II Storrs ^riMlturaKoIle^e 7w.Soi.^ Class -W. TTpBESESTED BY , raS 33UUO DJ oA,ISi 3 MUn3Ml aumioAsn^IP^ Digitized by the Internet Archive in 2009 with funding from Boston Library Consortium Member Libraries http://www.archive.org/details/laterextinctflorOOnewb DEPARTMENT OF THE INTERIOR MONOGEAPHS United States Geological Survey VOLUME XXXV WASHINGTON GOVERNMENT PRINTING OFFICE 1898 So^_ 3S UNITED STATES GEOLOGICAL SURVEY CHARLES D. WALCOTT, DIRECTOR THE LATER EXTINCT FLORAS OF NORTH AMERICA BY JOHN STRONG NEWBERRY A POSTHUMOUS WORK EDITED BT ARTHUR HOLLICK WASHINGTON GOVERNMENT PRINTING OFFICE 1S98 tostrobus the two forms of foliage are much more distinctly marked, the short appressed leaves closely investing the branches, resembling those before us, the open foliage quite different. The foliage of this plant is found in considerable abundance in the sandy layers of the Cretaceous on the Raritan River, and the cones were formerly numerous in the clay beds at Key port, where they were associated with great quantities of lignite, very 20 THE LATER EXTINCT FLORAS OF NORTH AMERICA. probably produced by the trees on which they were borne. In some cases the cones were replaced by pyrites, and these represent the original form and markings very perfectly, but require to be kept in alcohol or naphtha to prevent oxidation. They will be found in my memoir on the Flora of the Amboy Clays. Formation and locality : Cretaceous (Dakota group). Whetstone Creek, New Mexico. (Excluding fig. 9.) Note. — In the discussion of this species Dr. Newberry mentions having obtained cones from Nebraska and describes them, but does not refer to fig. 9, PI. XXVI, which is therefore questioned by me. — A. H. Sequoia Heerii Lesq. PI. XLVII, fig. 7. Hayden's Ann. Kept., 1871 [1872], p. 290; Tert. Fl. (1878), p. 77, PI. VII, figs. 11-13. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon Note. — The only reference by Dr. Newberry to this figure which I have been able to find is a pencil memorandum of the name, on the plate, and the specimen label giving the locality. — A. H. Sequoia Nordenskioldii Heeri Pi. XXVI, fig. 4. Fl. Foss. Arct., Vol. II (Miocene Fl. u. Fau. Spitzbergens, 1870), p. 36, PI. II, fig. 13b; IV, figs, la, lb, and 4-38. Taxites Langsdorfii Brong. ? Prod. (1828), p. 108. Sequoia Langsdorfii (Brong.) Heer. Fl. Tert. Helv., Vol. I (1855), p. 54, PI. XX, fig. 2; XXI, fig. 4. "Sequoia Langsdorfii ? Br." Newberry, Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 46; Ills. Cret. and Tert. PI. (1878), PI. XI, fig. 4. The leaves here figured are part of a large number of the same species collected by Dr. Hayden on the banks of the Yellowstone River. They are contained in fragments of a shaly argillaceous limestone, which have their surfaces covered by disconnected twigs with their leaves attached, that present the appearance of having been thrown down together, precisely as the deciduous branchlets of our cypress are detached by the frost. Among these are a few pieces of larger branches bearing short appressed leaves, which I have conjectured to be the permanent foliage of the tree. DESCRIPTIONS OF SPECIES. 21 These branches show at regular intervals the former points of attachment of deciduous (?) branchlets, but more of these are still in their places. They may have been dead twigs, some of which would naturally fall and accumulate with the leaves. The leaf-bearing branchlets are simple, and though lying together in great numbers and crossing at every angle, are distinct and disconnected. The probability would therefore seem to be that the foliage of the tree was deciduous, and although we have as yet no fruit to guide us, we may infer that it was not a Sequoia, but a Taxodium allied to our deciduous cypress. The leaves on the permanent branches are many-rowed, short, appressed, and awl-shaped. Those on the decidu- ous (?) branchlets are two-ranked, much longer, linear, acute or rounded, traversed by a strong median nerve, and decurrent at the base. The lower leaves on the branchlets are also generally shorter, sometimes much shorter, than those placed higher up. In my notes on these specimens, given in The Later Extinct Floras, written before the publication of Professor Heer's series of works on the arctic flora, these specimens were doubtfully referred to Sequoia Langsdorfii, to which they bear a considerable resemblance, but the foliage seems to have been more open and the leaves more decidedly decurrent. In these characters they approach very closely to the foliage of Sequoia Norden- skioldii, of which the description is published in the Fl. Foss. Arct, Vol. II, Abth. Ill, Miocene Flora und Fauna Spitzbergens, p. 36, PL IV, figs. 4-38. The correspondence is so close that I have been led to regard them as probably identical. More material, including the fruit, will be necessary to discriminate between these closely resembling conifers, and this reference, which seems authorized by the character of the foliage, must be considered as provisional until confirmed by evidence which is more conclusive. Formation and locality: Tertiary (Eocene ?). Yellowstone River, Montana. Sequoia spinosa Newb. PI. LIII, figs. 4, 5. Proe. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 504. "Branches slender; foliage open, rigid; leaves narrow, acute (acicidar) arched upward, appressed or spreading; spirally divergent; staminate 22 THE LATER EXTINCT FLORAS OF NORTH AMERICA. flowers in slender terminal aments, 2 inches long, 2 lines wide, anthers few, under peltate connective scales; cones ovate or subcyhndrical, com- posed of rhomboidal or square peltate scales." We have in the specimens before us, collected by Captain Howard, U. S. N., a new and strongly marked species of Sequoia, which is distin- guishable at a glance from all of its known congeners by its remarkably sparse, rigid, slender, and acute leaves. As usual among conifers of this group, there is some diversity in the character of the foliage, some of the leaves being closely appressed, others longer and more spreading. In gen- eral aspect the terminal branchlets resemble some of those belonging to S. Couttsice Heer (Phil. Trans., Vol. CLII, Pt. II; Foss. Fl. Bovey Tracey, PI. LX, figs. 1, 2, 3, 6, 15, 44, 45; Fl. Foss. Arct, Vol. I, PL XLV, fig 19), but the leaves are longer and more slender. None have been observed taking the squamose form exhibited by most of the foliage of S. Couttsice in the illustrations given by Professor Heer. The cones, too, are longer, being subcyhndrical, while in S. Couttsice they are nearly globular. One of the cones is represented in fig. 5, PI. LIII, unfortunately rather badly preserved. Quite a number are associated with the leaves in the specimens before us, but none more complete. The sterile aments are slender, the group of anthers much less crowded than usual. On some of the branchlets the foliage is more crowded and the leaves are broader than in the specimens figured on PL LIII, but this may be considered as a fair representation of its average character. Formation and locality: Tertiary (Miocene). Cook Inlet, Alaska. Taxodium distichum miocenum Heer. PI. XL VII, fig. 6; LI, fig. 3, in part; LII, figs. 2, 3 and 4 in part; LV, fig. 5, in part. Miocene Baltisehe Flora (1869), p. 18, PI. II; III, figs. 6, 7. Formation and locality: Tertiary (Miocene). Birch Bay, Washington (Wilkes Exploring Expedition). Note. — In the discussion of T. occidentale Dr. Newberry says that the speci- mens obtained at Birch Bay, Washington, by Professor Dana, and at Currant Creek, Oregon, by Rev. Thomas Condon, are hardly to be distinguished from the living T. distichum. — A. H. DESCRIPTIONS OF SPECIES. 23 Taxodium occidentale Newb. PI. XXVI, figs. 1-3; LV, fig. 5, in part.? Boston Journ. Nat. Hist., Vol. VII (1863), p. 576; Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1S68), p. -to; Ills. Cret, and Tert, PI. (1878), PI. XI, figs. 1-3. "Branchlets terete, leaves numerous, crowded, generally opposite, sessile, or very short petioled, one-nerved, flat, rounded at both ends." Branchlets terete, leaves distichous, sessile on very short petioles ; one- nerved, flat, rounded at both ends, the larger ones 4 centimeters wide by 20 centimeters long, the shorter ones elliptical, scarcely longer than wide. 1 The characters and variations of the foliage of this plant are very well shown in the figures given of it. From these it will be seen that the leaves are unusually broad for their length, are distinctly rounded at both ends, are sessile or very short petioled, and are not at all decurrent. Some of them are also very short, the shortest almost circular, and they are borne on the secondary as well as tertiary branchlets. In the notice of these leaves in The Later Extinct Floras they were compared with those of Taxodium dubium Heer, and it was stated that it differed from that species in having a larger number of leaves, less obliquely set on the branches, with rounded extremities, whereas in the foreign species the leaves are lanceolate in outline and acute at both ends. In his later works Professor Heer has expressed the opinion that Taxodium dubium is only a form of T. distichum, now living in our Southern States. This view has been generally accepted by fossil botanists, and the plants under consideration must be compared with the deciduous cypress. In looking over the large number of specimens which I have received from various localities I find that many of them can not be distinguished from the leaves of the living cypress. This is true of collections made by Professor Dana at Birch Bay, by Rev. Thomas Condon at Currant Creek, Oregon, and by Dr. Hayden in the lignite Tertiaries of the upper Missouri River. The specimens now figured, however, obtained by Dr. Hayden on the Yellowstone and Dr. Cooper in northern Montana, exhibit characters which would seem to be sufficient to separate them from the deciduous cypress, the leaves being relatively much broader and rounded at both ends. 1 In addition to the original published description, as quoted, the above subsequent manu- script description is also included. — A. H. 24 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Formation and locality: Tertiary (Eocene?). Yellowstone River, Mon- tana and northern Montana. (Excluding PI. LV, fig. 5, in part,.) Gtlyptostrobus Europ^eus (Brong.) Heer. PI. XXVI, figs. 6-Sa; LV, figs. 3, 4. 1 Fl. Tert. Helv., Vol. I (1855), p. 51, PI. XIX; XX, fig. 1. Taxodium Europce.um Brong. Ann. Sci. Nat., Vol. XXX (1833), p. 168. tl Glyptostrrobus Ewropcvus (Brong.)." Newberry, Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 43; Ills. Cret. and Tert. PI. (1878), PI. XI, figs. 6-8a. "Branches slender, bearing many branehlets; leaves of two forms, one short, thick, and appressed, the other longer (one-half inch), slender, diverg- ent, acute, the shorter form carinated, the longer less distinctly, if ever so; male catkins small, terminal, globular, composed of a few shield-shaped scales; fertile cones larger, ovoid in form, scales narrow, wedge-shaped at base, at summit expanded, semicircular, with waved or crenate margins, the dorsum of each more or less distinctly marked with 10 to 12 acute, radiating carina?." One of the most interesting plants of the European Tertiary is the Glyptostrobus, first discovered by Brongniart, and subsequently fully illus- trated in the magnificent work of Prof. 0. Heer, Flora Tertiaria Helvetia?, Vol. I, p. 52, PI. XVIII; XXI, fig. 1 ; Vol. Ill, p. 159. The genus is now only represented on the earth's surface by G. heterophyllus and G. pendulus of China, but during the middle Tertiary epoch was widely spread over both hemispheres. Most of the exposures of our older Tertiary strata have furnished specimens of some one of the various phases of what is regarded by Professor Heer as a single species, but which has been described under the three names of G. Ewopceus, G. Ungeri, and G. Oeningensis What are probably but varieties of this same plant were collected by the United States Exploring Expedition under Captain Wilkes, at Birch Bay, Washington, by George Gibbs, esq., geologist to the Northwestern Boundary Commission (see Boston Journ. Nat. Hist,, Vol. VII, No 4 (1863), p. 517), and are represented by numerous specimens in the collection of fossil plants made by Dr. Hayden on the Yellowstone and Upper Missouri. 'Dr. Newberry's only manuscript for PI. LV, figs. 3. 4, is a pencil memorandum referring them to "Glyptostrobus Ungeri Heer.'' — A. H. DESCRIPTIONS OF SPECIES. 25 Iii this country, as in Europe, the foliage of Glyptostrobus exhibits two forms wherever the plant is found; the short appressed, and the longer divergent leaves. In addition to this the specimens from the northwest coast have common character by which they may be distinguished at once from those collected by Dr. Hayden. The Western plant is more slender, the appressed leaves sharper and more delicate, the divergent leaves much longer, corresponding more nearly to the European form described as G. Ungeri, while those from the Upper Missouri resemble more the variety known as G. Europceus. The cones, however, found with the Missouri specimens are more like those of G. Ungeri than G. Europceus, the dorsum of the scale being marked by short, radiating carinas, as in the former, the margin being waved, but not regularly scalloped, as in the latter. From the extreme West we have as yet no cones which can be cer- tainly referred to this plant, so that the most important element in the comparison is wanting, but it would seem that here, as in Europe, the dif- ferent phases of the plant belonging to the genus Glyptostrobus are so linked together that they should be regarded as forming but a single species. At least we have not yet obtained sufficient material to justify us in attempting to define the limits of other species. The two living species of Glyptostrobus which Fortune found growing in China seem to resemble the fossil forms as much as they do each other, and it is perhaps doubtful whether they should not all be united under the same name. The living and fossil plants are associated with fan-palms, and belong to the flora of the southern temperate zone, or that of a lati- tude ten degrees south of the localities where the fossils occur. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota, and Birch Bay, Washington (Wilkes Exploring Expedition). Thuja interrupta Newb. PL XXVI, figs. 5-od. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 42; Ills. Cret. and Tert. PL (1878), PL XI, figs. 5, 5a. "Branchlets flat, narrow, linear, pinnate, opposite, except at the sum- mit of the branch, somewhat remote, connected only by the slender woody axis on which the leaves of the branchlets are not decurrent; leaves in four 26 THE LATER EXTINCT FLORAS OF NORTH AMERICA. rows appressed, those of the upper and lower ranks orbicular or obovate, shortly mucronate, lateral ones longer, subulate, terminating in awnlike points; larger branches naked or bearing closely appressed linear scalelike leaves." This is a very distinct and beautiful species collected by Dr. Hayden, near Fort Union, Dakota, presenting marked differences from any known living or fossil members of the genus. Its most remarkable character is its slender and graceful habit, and the separation of the pairs of leafy branchlets along the naked and slender branch. The leaves, too, are less crowded than in most other species, and the lateral ranks are prolonged into acute awnlike points, all of which must have given it an aspect considerably unlike that of any species hitherto described. At the time this species was described no true Thuja had been recog- nized in the fossil state. Thidtes salicornoides (Ung. Chlor. Prot. PI. II, fig. 1; XX, fig. 8) is regarded by Endlicher and Heer as a Libocedrus, to which it certainly seems, judging from the figures and descriptions given of it, to be more closely allied than to Thuja. Since that time, however, a number of fossil plants have been referred to the genus Thuja, principally derived from the amber. One species, T. saviana, Gaud., Neue Denkschr. Schweitz. Gesell., Vol. XVII (1860) Fl. Foss. Ital., 3d Memoir, p. 12, PL I, figs. 4-20; II, figs. 6, 7, has been established upon the fruits as well as the foliage, so that there can be no question in regard to its botanical position. Another species, T. mengeanus, Goepp. and Ber. Monogr. Foss. Conif. (1850), p. 181, PI. XVIII, figs. 10, 11, resembles so closely our T. occidentaUs that it has been referred by Goeppert to that species. Besides this, half a dozen additional species obtained from the amber have been described by Goeppert from meager material and consequently somewhat vaguely. It may be considered established, however, that during the Tertiary age the genus Thuja was in existence and well represented in the coniferous flora. The species now under consideration is represented by a large number of specimens, though usually of small size, in the collections made at Fort Union by Dr. Hayden, and has also been met with by Mr. George M. Dawson in the Tertiary lignite strata of Canada. No fruit has been found that can be certainly connected with the leaves, but there is in the collection one imperfect cone derived from the same locality with the DESCRIPTIONS OF SPECIES. 27 branches of Thuja which resembles closely in structure the cone of T. occidentals. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. ANGIOSPERM.E. MONOCOTYLEDONE^. Order GRAMINEiE. Phragmites sp. ,J ? Newb. PI. XXII, figs. 5, 5a. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 38; Ills. Cret. and Tert. PI. (1878), PI. VII, figs. 5, 5a. "Among the plants collected by Dr. Hayden from the Miocene beds near Fort Union are numerous fragments of what seems to be a species of Phragmites. These consist of portions of broad, unkeeled, flaglike leaves, marked by numerous longitudinal nerves, of which there are eight or nine more strongly marked, and between these about seven much finer, con- nected by alternate cross bars. No keel is shown in any of these fragments. In general structure these leaves closely resemble those of P. Oeningensis Heer (Fl. Tert. Helv., Vol. I, p. 64, PL XXIV): but the material is not sufficient to determine whether our species is identical with that. 11 Formation and locality: Fort Union, Dakota (Dr. Hayden)." Order PALMiE. Sabal Campbelli Newb. PL XXI, figs. 1, 2. Boston Journ. Nat. Hist., Vol. VII (1863), p. 515. "Leaf large, 8 feet in diameter, with fifty to seventy folds; petiole long, 16 lines or more in width, flat above, without a central keel and unarmed; nerves numerous and fine, about fifty in each fold — six principal nerves on each side of the midrib, with three intermediate nerves between each pair, the middle one being strongest." In its general character this palm, bears a strong resemblance to Sahal major, Ung. sp. (Chlor Prot., p. 42, PL XIV, fig. 2; FL Tert, Helv., Vol. I, 28 THE LATER EXTINCT FLORAS OF NORTH AMERICA. p. 88, PL XXXV; XXXVI, figs. 1, 2), the size of the leaf, the number of folds, and the character of the nervation being nearly the same ; but in our plant the petiole is flat or slightly arched, without the central keel of S. major Unfortunately we have as yet obtained no specimen showing the under side of the leaf, and therefore want the important diagnostic character of the length of the point of the petiole. From Sabal Lamanonis this species may be distinguished by its greater size, more numerous leaf-folds, finer and more crowded nervation, and by its flat unkeeled petiole. Fan-palms are not now found on the Pacific coast above Cape St. Lucas (lat. 23° north), though the average temperature would permit them to grow perhaps as far north as San Francisco (lat. 38°). In the valley of the Mis- sissippi and on the Atlantic coast they extend northward to the parallel of 35°. Formation and locality : Oetaceous (Puget Sound group). Bellingham Bay, Washington. Sabal grandifolia Newb. n. sp. PI. XXV ; LXIII, fig. 5 ; LXIV, figs. 2, 2a. Sabal CampbeUi Newb. (in part). Boston Journ. Nat. Hist., Vol. VII (1863), p. 515. "Sabal CampbeUi Newb." Ills. Cret. and Tert. PI. (1878), PI. X. Leaves very large, 8 to 10 feet in diameter, with eighty to ninety folds; petiole 1£ to 3 inches wide, flat or slightly arched above without a keel above or below ; margins smooth, terminating in an arch, often unsymmet- rical, on the upper side, from which the folds radiate; on the under side prolonged into a spine, 6 inches or more in length. This species was first made known by specimens brought by Dr. Hayden from the valley of the Yellowstone. These represent both the under and upper surfaces of the leaf, and among them are fragments from the central and marginal portions. Some of these specimens are the originals of the figures given on Pis. XXV and LXIV. A portion of a leaf supposed to belong to this species is represented in PI. LXIII, fig. 5. This was from Fischers Peak, New Mexico. In the great number of the remains of palms found in the Tertiary and Cretaceous rocks of the west — trunks, leaves, and fruit — it has been very difficult to define distinct species, and it is probable that many years will DESCRIPTIONS OF SPECIES. 29 elapse before perfect order can be brought out of the present confusion. The species now under consideration may, however, be identified by the large size of its leaf, its plain unkeeled petiole drawn out into a long acute sj}ine on the under side, the very numerous folds, aud the ci'owded, subequal nervation. The only species that rivals it in size and is liable to be confounded with it is Sabalites Grayanus Lesq. (Tert. Fl., p. 112, PI. XII, fig. 2), reported as found at "Golden, Colorado; Point of Rocks, Wyoming; Vancouver Island, and in Mississippi." Only fragments have, however, been found in some of these localities, and it is scarcely probable that their identification with the specimens from Golden will be confirmed by future observation. In the figure given by Lesquereux of the type of his species, the point of the petiole is not more than half as long as in some of the leaves of Sabal grandifolia; and if the strongly keeled petiole, of which a portion is repre- sented on the plate cited above, can be accepted as normal for S. Grayanus, this would in itself be sufficient to distinguish the species. The petiole of the leaf of S. grandifolia is smooth and gently arched above and below, never keeled. I formerly supposed this species to be identical with that found at Bellingham Bay, Washington (#. Canqjbelli, Newb.), and figured on PI. XXI of this monograph, but that species has somewhat smaller leaves, with a less number of folds and less crowded nervation. The best specimens yet obtained of Sabal grandifolia are those collected by Dr. Hayden in the Yellowstone Valley; but others, which indicate an almost equal size and exhibit essentially the same characters, were obtained by Mr. I. C. Russell from the green sandstones of the Laramie group on Fischers Peak, Colorado, and I have specimens representing this species from Walsenburg, Florence, Coal Basin, and other places where there are outcrops of the Laramie. Fan-palms occur in the Cretaceous rocks of Orcas Island and in the coal series of Fletts Creek, near Tacoma, Washington, but they are smaller and with fewer folds. Fragments of palm leaves were obtained by Dr. Evans on Vancouvers Island, and these have been referred to Sabalites Grayanus by Lesquereux, but they were very imperfect and of little value in the comparison of species. Formation and locality: Cretaceous (Laramie group). Fischers Peak, Colorado, and Tertiary (Eocene !), Yellowstone River, Montana. 30 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Sabal IMPERIALIS Dll. PI. XVI, figs. 6, 6a. Trans. Roy. Soc. Canada, Vol. I, Sec, IV, 1882 [1883], p. 26, PI. VI; Vol. XI, Sec. IV, 1893 [1894], p. 57, PI. XIV, fig. 61. Sabal sp. Newb. Boston Journ. Nat. Hist., Vol. VII (1863), p. 515. "Fragments only of a fan palm are contained in the collections made at Nanaimo; if, as now appears probable, the beds containing it are Cretaceous, it will doubtless prove to be a new species. "The only tangible characters exhibited in the specimens yet obtained are in the nervation. "The nerves are very fine, nearly sixty in each fold — six stronger ones on each side of the midrib, and between each two of these three finer ones, of which the middle is strongest." Formation and locality: Cretaceous (Puget Sound group). Nanaimo, Vancouvers Island. Sabal Powellii Newb. PI. LXIII, fig. 6; LXIV, figs. 1, la. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 504. "Leaves of medium size, 4 or 5 feet in diameter, petiole smooth, unarmed, terminating above in a rounded or angular area from which the folds diverge, beneath concavely nan-owing to form a spike 3 to 4 inches in length ; rays about fifty, radiating from the end of the petiole, perhaps sixty in the entire leaf compressed to acute wedges where they issue from the petiole; strongly angled and attaining a maximum width of about 1 inch; nerves fine, about twelve stronger ones on each side of the keel, with finer intermediate ones too obscure for enumeration." These leaves, as will be seen by the figures given, bear considerable resemblance to those described by Lesquereux under the name of Flabel- laria Eocenica (Tert, FL, p. Ill, PL XIII, figs. 1-3), but a large number of specimens in the collections made at Green River, agreeing among them- selves in all essential particulars, enable us to clearly define the species and show its distinctness from any yet found on this continent. From Fldbel- laria Eocenica it differs in having a larger number of folds and a longer point of support on the under side of the leaf. From Sabal Campbelli Newb. DESCRIPTIONS OF SPECIES. 31 it may be distinguished by its smaller size, less number of folds, and some- what shorter spike of the petiole. Sabal Gray an us Lesq., is larger, with nearly double the amount of rays and a keeled petiole. Sabal grandifolia Newb. is much larger and like S. Grayanus has twice as many folds. These large species may be distinguished from each other by the concavely pointed and keeled petiole of 8. Grayanus. In the figures given, that on PI. LXIII, fig. 6, represents the under side of the leaf at its base, showing pointed spike formed by the prolongation of the petiole. PI. LXIV, fig. 1, represents the summit of the petiole and base of the leaf on the upper side. Here the rays are inserted on either side of a nearly symmetrical angle of the petiole, but other specimens show that the line of insertion of the rays is sometimes obliquely arched, precisely as in the figure of the base of the leaf of Sabal grandifolia, shown in fig. 2, PI. LXIV. Fig. la of the same plate represents two folds of the leaf of Sabal Powelli, given of the natural size, to show the nervation. Formation and locality: Tertiary (Green River group). Green River Station, Wyoming. Manicaria Haydenii Newb. PL LXIV, fig. 3. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 504. "Frond large, leaves pinnately plicated, folds 1£ centimeters in width above, slightly narrowed below; flat or gently arched, smooth, springing from the midrib at an angle of 25 degrees above, 30 degrees below (in the specimens figured); folds attached to the midrib obliquely by the entire width, and to each other by their entire length (?) ; nervation fine, uniform (?), parallel." The specimen figured is only a small portion of an entire leaf, and is inadequate to supply material for a satisfactory description. It is, however, evidently the central portion of a palm leaf of which the general form was elongated and the length probably many times the breadth. It was com- posed of a large number of pinnate, united, flattened folds, divergent from the midrib at an acute angle. These folds were not keeled like those of Flabellaria and Sabal, but either plain or gently arched ; whether they were united throughout their entire length or were free toward the margin of the leaf is not certainly known, as we have nowhere seen the entire breadth of 32 THE LATER EXTINCT FLORAS OF NORTH AMERICA. the leaf; but it is probable that they were joined to the margin. Until more complete specimens of this plant shall be obtained nothing positive can be said of its relations to living palms; but it is evidently allied to Heer's Manicaria formosa (Fl. Tert. Helv. I, p. 92, PI. XXXVIII), and to the living Manicaria of South America. It certainly also belongs to the same genus with Lesquereux's palm leaves which he has grouped under the new generic name of Geonomites, but it has seemed to the writer more closely allied to Mannicaria than Geonoma. Its specific relations are also somewhat doubtful. It most resembles Geonomites tenuirachis Lesq. (Tert. FL, p. 117, PI. XI, fig. 1), but in the figured specimen of that plant the folds of the leaf spring from the midrib at a much more acute angle than in the specimen before us. This difference could be reconciled if it were certain that Lesquereux's specimens came from near the summit of the leaf, where the folds generally approach the direction of the midrib. Dr. Hayden reports the specimen to which the name of Geonomites tenuirachis was given as coining from the Raton Mountains and from strata which are older than that which furnishes the specimen now described. So far as now known there are no species common to the Raton Mountain beds and the Green River Tertiary. There is a strong probability, therefore, that the differences indicated have specific value. Formation and locality: Tertiary (Green River group). Green River Station, Wyoming. Order SMILACE^E. Smilax cyclophylla Newb. PI. LIV, fig. 3, in part. Boston Journ. Nat. Hist., Vol. VII (1863), p. 520. " Leaves circular or round, ovate, cordate or slightly peltate at base, five-nerved, central and interior pair of lateral nerves strongly marked, basilar pair delicate and scarcely reaching the middle of the leaf; second- ary nervation forming a polygonal network more or less rectangular." Unfortunately, the only specimen of this plant which I have — that collected by Professor Dana and figured in his Geology of the United States Exploring Expedition, Atlas, PI. XXI, fig. 10 — is imperfect, the upper part of the leaf being wanting. So far as its outline is indicated by the part which remains, it would seem to have been nearly orbicular. If DESCRIPTIONS OF SPECIES. 33 such was the case, it resembled in general aspect the leaves of S. orbicu- laris Heer (Fl. Tert. Helv., Vol. Ill, p. 167, PL CXLVII, figs. 18, 19), and perhaps as much those of the living S. rotund* 'folia. From 8. orbicularis it differs, however, in the shortness of the exterior pair of lateral nerves and in the polygonal reticulation of the secondary nervation. Formation and locality: Tertiary (Eocene f). Birch Bay, Washington. Order IRIDACE-ffi. Iris sp.f Newb. PL XXII, fig. 6. Ills. Cret. and Tert. PI. (1878), PI. VII, fig. 6. Note. — The only manuscript relating to this specimen which I have been able to find is the above designation, in pencil, on the margin of the plate. Locality not known. — A. H. MONOCOTYLEDON OF UNCERTAIN AFFINITIES. Monocotyledon gen. et sp.? Hollick. PL XL VI, fig. 9. Note. — This figure apparently represents the lower portion of a leaf of some monocotyledon, but neither the specimen nor any manuscript referring to it was found except a memorandum of the locality on the plate margin, and there is no indication of Dr. Newberry's ideas concerning its affinities. — A. H. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. DICOTYLEDONE^E. Order JUGLANDACEiE. JUGLANS NIGELLA Heer. PL LI, figs. 2 (in part), 4. FL Foss. Arct., Vol. II, Abth., II (1869), p. 38, PL IX, figs. 2-4. Note. — So identified by Dr. Newberry, as indicated by memorandum on margin of plate. — A. H. Formation and locality: Tertiary (Miocene). Admiralty Inlet, Alaska. mon xxxv 3 34 THE LATER EXTINCT FLORAS OF NORTH AMERICA. JlTGLANS OCCIDENTALIS Newb. PI. LXV, fig. 1; LXYI, figs. l-4c. Proe. U. S. Nat.' Mus., Vol. V (March 21, 1883), p. 507. "Leaves somewhat variable in form and size, from 3 to 8 inches in length and 1 to 2 inches in width, but generally 6 inches long by 1 J inches wide, broad-lanceolate in outline, widest in the middle, summit acute, base rounded, often unsymmetrical; margins entire; nervation delicate; midrib straight; lateral nerves, about twenty on each side, gently curved upward, the lower ones branched and anastomosing near their extremities, the upper simple and terminating in the margins; tertiary nervation very delicate, or obscure from being buried in the parenchyma of the leaf, forming an open and irregular network. Fruit small, elongated, somewhat prismatic; divi- sions of the envelope lenticular in outline, narrow, thin." The figures given of this species, collected by Dr. C. A. White, illustrate veiy well the average size and form of the leaves. The number contained in the collection is large, and they seem to have been extremely abundant in the locality where they were obtained. In a few instances they are found attached to the stems that bore them, but are generally separated and more or less torn and broken. The tree was evidently a strong-growing and luxuriant one, for some of the leaves are not less than 8 inches in length; the nervation is fine and often not discernible, probably from the thickness of the leaf; in some specimens, however, it is more distinct and has all the char- acters of that of the genus to which the leaves have been referred. The fruit, of which fortunately one specimen was found in immediate contact with the leaves, is small, marked with raised lines, elongate in form, and resembles mitre the fruit of Carya olivceforniis than any other of our living species. It miffht be inferred from the small size of the nut and its elongated form that it was immature, but near it lies a segment of the envelope which has appa- rently exfoliated at maturity. As only one specimen of the fruit has been discovered, it is possible that it does not represent the average size and form. This fruit is distinctly that of a Carya and not of a Juglans, as now defined, but the leaf is more like that of the latter than the former genus. It dis- tinctly falls within the old genus Juglans, but can hardly be reduced to either of its subdivisions which have now been given generic value. A species of Juglans collected near the same locality as this has been DESCRIPTIONS OF SPECIES. 35 described by Lesquereux under the name of -/. ScJiimperi, but his descrip- tion and figures indicate a plant different from this one. He describes the leaves of his species as being- broadest near the base, long and narrow, having a nervation that differs from that of the leaves before us; the lateral nerves being camptodrome — that is, uniting in festoons along the borders and the tertiary nervation forming rectangular areoles — while in our species a large part of the lateral nerves terminate in the margins and the tertiary nervation is more open and irregular. Formation a ml locality: Tertiary (Green River group). Green River, Wyoming. Carta antiquorum Newb. PL XXXI, figs. 1-4. Ann. X. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 72; Ills. Cret. and Tert. PI. (1878), PI. XXIII, figs. 1-4. "Leaves pinnate, large, leaflets lanceolate, long-pointed, acute, sessile, finely serrate, middle leaflet broadly lanceolate, widest above the middle, narrowed to the base, which is somewhat unequal ; lateral leaflets narrow, lanceolate, unsymmetrical throughout, somewhat falcate; nervation sharply defined, conspicuously parallel, medial nerve straight in the terminal leaf- lets, more or less curved in the lateral ones; secondary nerves springing from the midrib at a large angle, numerous, subparallel, all arched upward, their extremities prolonged parallel with the margins of the leaf; the upper ones strongly arched, but terminating more directly in the margins ; tertiary nerves distinct, mostly simple, straight, and parallel among themselves, con- necting adjacent secondary nerves nearly at right angles." The form, serration, and nervation of these leaves are entirely those of Carya, and while without the fruit it may not be possible to fix their place in the series more definitely than to say that they represent the genus Juglans as formerly constituted, including Carya, we may at least refer them with confidence to a place within the limits of that genus. The leaves of the species of Carya and Juglans are very similar, so much so that some of the Caryas, such as C. olivceformis, have leaves that could in the fossil state hardly be distinguished from those of Juglans. The specimens before us, however, seem to me to be more widely 36 THE LATER EXTINCT FLORAS OF NORTH AMERICA. separated from those of the known species of Juglans than are those of the Pecan, and there seems little doubt that the tree, if now living, would fall within the limits of Carya. In some specimens the lateral nerves are remarkably straight and numerous, giving to the leaf very much the aspect of those of iEsculus; but, from a comparison of the many leaves of this plant in the collection of Dr. Hayden, I infer that they were not palmately grouped, but pinnate, the form of the bases of the leaves indicating this. The tertiary nervation is also quite different from that of iEsculus. In the latter genus it usually forms an exceedingly fine network filling the interspaces between the secondary nerves, in which the straight transverse latticelike bars so characteristic of the fossils before us are wanting. At least this is the case with our American "Buckeyes." In 2E. Hippocastanum of the Old World something of the kind is visible, but in prevalence and regularity very unlike that in the fossil. In has been questioned whether these leaves should be referred to Juo-lans or Carya, and after somewhat extensive comparisons I was led to include them in the latter genus. In looking over the descriptions that have been given of various fossil species of Juglans we find that quite a laro-e number of them should be rather reckoned as pertaining to Carya, taking the fruit as a criterion. For example, in the J. corrugata of Ludwig (Palfeontogr., Vol. VIII, p. 178, PI. LXX) the form and the nervation of the leaf is very much like this before us, only the nervation is a little less regular and the marginal serration is coarser. The fruit associated with these leaves is more nearly allied to that of our J. nigra than it is to the fruit of the common species of Carya, whei-eas in the illustrations of J. levi- gata, Brong, given by Ludwig (Palseontogr., Vol. VIII, p. 134, PI. LIV, figg 1-6), we have leaves which correspond in a general way with these, as far as form and marginal serration are concerned; nervation exceedingly regular, but more camptodrome, and the fruit distinctly that of Carya. It will be necessary to wait the discovery of the fruits which were connected with these strongly marked leaves, an event which will be likely to occur at no distant date, before deciding to which subdivision of the old genus Juglans it belongs. Formation and locality: Tertiary (Eocene?). Mouth of Yellowstone River, Montana. DESCRIPTIONS OF SPECIES. 37 Order MYRICACEiE. Myrica (?) trifoliata Newb. n. sp. PI. XIV, fig. 2. Leaves in threes, lance-linear in outline, acute at summit and base; margins remotely and coarsely marked with appressed teeth; nervation delicate. These are leaves which are manifestly distinct from any others from the Dakota sandstones yet described, and are referred to Myrica with doubt, as nothing but the general resemblance of form and marginal serration can be cited as proof of affinity. In due time, however, more material illustrating the species will be discovered, and, we may hope, also the fruit. At present it stands simply as a positive addition to the list of arborescent plants hitherto found in the Dakota group, but one of which the botanical relations must be determined by future observations. Formation and locality : Cretaceous (Dakota group). Whetstone Creek, northeastern New Mexico- Order SALICACE.ffi. POPULUS ACERIFOLIA Newb. PL XXVIII, figs. 5-8. Ann. N.Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 65; Ills. Cret. and Tert. PI. (1878), PI. XIII, figs. 5-8. "Leaves long-petioled, broad-ovate in outline, often somewhat three- lobed, obtuse, slightly cordate at base, margins coarsely and unequally crenate; nervation radiate, strong; medial nerve straight, giving off one pair of lateral nerves near the center of the leaf, and above these about three smaller ones on each side. From the base of the midrib spring two pairs of lateral nerves on each side. Of these the lower and smaller pair diverge at an angle of 60 degrees to 70 degrees with the midrib, are nearly straight, give off numerous short branches on the lower side, and terminate in the lateral margin below the middle. The second and larger pair of laterals diverge from the midrib at an angle of about 35 degrees to 45 degrees, are straight or slightly curved upward, terminating in the margins 38 THE LATER EXTINCT FLORAS OF NORTH AMERICA. above the middle, or in the lobes, when lobes are developed; from these spring three or four branches on the outside, which, simple or branching, terminate in the scallops of the border. The tertiary nervation, shown very distinctly in some of the specimens, forms a network similar to that of the leaves of living - species of Populns, of which the areolae exhibit con- siderable diversity of form and size, being polygonal, with a roundish outline, or quadrangular." Collected by Dr. F. V. Hayden. The general aspect of these leaves is much like that of some of the living maples, but they are less distinctly trilobate. The crenation of the margin is coarse, irregular, and obtuse or rounded, as is usually the case with the leaves of a group of poplars, the leaves of which in other respects most resemble these. The surface is, in many specimens, some- what roughened, as though in the living leaf it was canescent; also a com- mon character among poplars, but rare or unknown among maples. The leaves of the maples are generally thin, and the network of the tertiary nerves is remarkably fine and uniform, affording a reliable generic charac- ter. This is visible in the leaves of all the recent maples, and is beau- tifully shown in the impressions of the leaves of A. pseiidopJatanus, given in Ettingshausen and Pokorny's Physiotypia Plant. Austria, PI. XVII, fig. 10. Among fossil species this perhaps resembles most P. leucophylia (Foss. Flor. v. Gleichenberg, Denkschrift, k. k. Acad. Wien., Vol. VII (1854), p. 177, PI. IV, figs. 6-9), but is much more distinctly crenate-toothed on the margin. The teeth of P. leucophylia are either obsolete or remote and acute, making a sinuate-dentate margin. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. Populus cokdata Newb. PI. XXIX, fig. 6. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 60; Ills. Cret, and Tert. PL (1878), PI. XIV, fig. 6. "Leaves orbicular or round heart-shaped, deepl} r cordate at the base; margins strongly toothed, except the inner border of the lobes of the base; DESCRIPTIONS OF SPECIES. 39 nervation radiate; medial nerve straight, simple below, branched near the summit; lateral nerves, three pairs diverging at nearly equal angles, from a common point of origin; lower lateral nerves small, simple, arched upward at their summits, terminating in the margins; second pair of lateral nerves springing from the basal point of radiation nearly at right angles with the midrib, arching upward as they approach the lateral margins, and support- ing each about three branches on the inner side; third pair of lateral nerves diverging from the midrib at its base at an angle of about 45 degrees, bearing one or two lateral branches, and terminating in the margin above the middle of the leaf." Of this neat species there are no complete specimens in the collection made by Dr. Hayden, none of them showing the summit of the leaf. Enough is, however, discernible in them to show that they represent a species of Populus different from any other in the collection and from any before described. Of the species at present growing on the North Ameri- can continent the leaves of P. heterophytta approach most nearly to these, but the nervation of the leaves of that tree is never so distinctly radiate. In the character of its marginal dentations this species resembles P. mutabilis crenata Heer, but is clearly distinguished from that by its cordate base and corresponding' radiate venation. Populus Zaddachi Heer (Fl. Tert, Helv., Vol. Ill, p. 307) has a still closer resemblance to this than either of the species mentioned, and it has been regarded by Lesquereux as identical with it, but in all the figures of that species published the dentation of the margin is less strong and acute and the nervation is less radiate. In P. cordata the basilar pair of lateral nerves reaches the margins below the middle of the leaf, and the second pair of lateral nerves spring from nearly the same point, while in P. Zaddachi the basilar pair reach the margin above the middle and the second pair leave the midrib considerably above the origin of the basilars. The leaf figured by Professor Heer (Fl. Foss. Alaskana; Fl. Foss. Arct,, Vol. II, Abth. II, PI. II, fig. 5), has the character of the fossil before us and would seem to represent the same species. Yet notwithstanding the differ- ences already pointed out, this is referred by Professor Heer to P Zaddachi. The nervation is, however, so different from that of the typical forms of that 40 THE LATER EXTINCT FLORAS OF NORTH AMERICA. species that I am compelled to regard them as distinct till proof is furnished to the contrary. Formation and locality: Tertiary (Eocene?). Banks of Yellowstone River, Montana. Populus (?) cordifolia Newb. PI. Ill, fig. 7 ; V, fig. 5. Ann. N.Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 18; Ills. Cret. andTert. PI. (1878), PL V, fig. 5. "Leaves heart-shaped, slightly decurrent on the petiole ; margins entire; nerves fine but distinctly defined; medial nerve straight or slightly curved, running to the margin; lateral nerves, six on each side, given off at an angle of about 50 degrees, nearly parallel among themselves, straight near the base of the leaf, slightly curved toward the summit; lower lateral nerves giving off on the lower side about four simple or once-forked, slightly curved branches, which terminate in the basilar margin; second pair of lateral nerves giving off about three similar branches on the lower side, which run to the lateral margins; third pair supporting about two, and fourth pair one branch on the lower side near the summit; tertiary nerves springing from the secondary nearly at right angles, slightly arched and running across nearly parallel to connect the adjacent secondary nerves." Collected by Dr. F. V. Hayden. In its general aspect this species closely resembles the preceding, but several specimens which I have before me agree in being less rounded and more heart-shaped, and the lateral nerves are more numerous and given off at a larger angle. In these leaves the basilar nerves reach the lateral margins below the middle, and their second branches, as a consequence, have more the aspect of some of the leaves of the Cupuliferse, such as Corylus. The latticelike arrangement of the tertiary veins in this, as in the other species of the group, is very characteristic of the Cupuliferse, though not strictly limited to them. If we could imagine a Corylus with rounded or broadly cordate leaves, of which the margins were entire, we should have a very near approach to these plants. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. DESCRIPTIONS OF SPECIES. 41 Populus cuneata Newb. PI. XXVIII, figs. 2-4 ; XXIX, fig. 7. Ann. N.Y. Lye. Nat. Hist.,Vol. IX (April, 1868), p. 64 ; Ills. Cret. and Tert. PI. (1878), PI. XIII, figs. 2-4, under P. nervosa var. ; and PI. XIV, fig. 7, under P. Nebr ascends. "Leaves small, obovate, somewhat wedge-shaped at the base, obtusely pointed at the summit, coarsely, obtusely, and irregularly dentate on the margins, three-veined, basilar nerves given off at an acute angle, terminating above the middle of the margin; secondary nerves few-forked, and often inosculating." This species is represented by numerous specimens in the collection made by Dr. Hayden. It will be seen to be distinctly separable from any of the species published with it, and the same may be said in regard to those published elsewhere. In general form it bears some resemblance to P. attenuata, Al. Braun (Heer, Fl. Tert. Helv., Vol. II, p. 15, PI. LVII, figs. 8-12, and PI. LVIII, figs. 1-4); also to some forms of P. mutabllis% Heer; but the nervation is less crowded than in those species, and both are acuminate-pointed. An elongated form is shown on PI. XXIX, fig. 7. Formation and locality: Tertiary (Eocene ?). Banks of Yellowstone River, Montana. Populus cyclophylla Heer. PI. Ill, figs. 3, 4; IV, fig. 1. Proc. Phila. Acad. Nat. Set, 1858, p. 266. Lesq., Ills. Cret. and Tert. PI. (1878), PI. Ill, figs. 3, 4; PI. IV, fig. 1, under P. litigiosa Heer. Populites cyclophylla (Populus) Heer. Lesq., Am. Journ. Sci., Vol. XLVI (July, 1868), p. 93. Populites cyclophylla (Heer)? Lesq., Cret. Fl. (1874), p. 59, PI. IV, fig. 5; PI. XXIV, fig. L The specimens upon which Heer founded his species are given on PL III, and are before me as I write. The smaller specimen represented by fig. 3 is characteristic and normal, except that it is not more than half the average size of the leaves of this species. Fig. 4 is but a fragment, and it is very doubtful whether it should be considered as belonging to P. cyclo- phylla. The leaf figured on PI. IV is about of the average size, and though incomplete, may be accepted as a fair representative of the species. Such leaves are not uncommon in the Dakota group at Fort Harker, and a 42 THE LATER EXTINCT FLORAS OF NORTH AMERICA. precisely similar one is figured by Lesquereux on PL IV of his Cretaceous Flora. It is more than doubtful whether any of these leaves belong to a true Populus; the nervation is more distinctly and regularly pinnate than in any living species of the genus, and the probability is that we have here the relics of a genus of trees now extinct, but closely related to the poplars. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska,- and Fort Harker, Kansas. Populus (?) Debeyana Heer. PL IV, fig. 3; V, fig. 7. Nouv. Mem. Soc. Helv. Sci. Nat., Vol. XXII (18(56), p. 14; PL I, fig. 1. Juglans Debeyana (Populus?) Heer, Lesq. Am. Journ. Sci., Vol. XLVI (July, 1868), p. 101. Juglans (?) Debeyana Heer, Lesq. Cret. Fl. (1874), p. 110, PL XXIII, figs. 1-5; Ills. Cret. and Tert. PI. (1878), PL IV, fig. 3; V, fig. 7. A number of leaves in the collection made by Dr. Hayden are clearly identical with that referred with doubt by Professor Heer to Populus from the generalities of its nervation, and impressions of what would seem to have been glands at the base on either side of the point of insertion of the petiole. In our specimens, however, there are no glandular impressions, and the departure from the normal type of nervation in Populus noticed by Professor Heer is still more conspicuous. The strong pair of basilar nerves so characteristic of the poplars is entirely wanting, the inferior lateral nerves being small, and the stronger ones, which succeed them above, are not opposite. In view of the marked departure which these leaves exhibit from the nervation and form of the typical poplars, Professor Heer suggests that they may represent an extinct genus of the order Salicinea?, but it seems to me their affinities are closer with the Magnoliacea?, and that it is even probable that they represent a species of the genus Magnolia. Lesquereux has suggested that this leaf should be referred to Juglans, comparing it with J. latifolia Heer, from the Tertiary of Switzer- land; but a considerable number of specimens before me fail to convince me of the justice of this reference, and yet they hardly suggest any other botanical relations. The leaves were evidently very thick and leathery, and the nervation is crowded and strong. It will be necessary that some DESCRIPTIONS OF SPECIES. 43 other parts of the plant shall be obtained before this question can be satisfactorily settled. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Populus elliptica Newb. PI. Ill, figs. 1, 2. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 18G8), p. 16. Ficus ? rhombokleus Lesq. Am. Journ. Sci., Vol. XLVI (July, 1868), p. 96; Ills. Cret. and Tert. PL (1878), PI. Ill, figs. 1, 2. Phyllites rhomboideus, Lesq. Cret. Fl. (1874), p. 112, PI. VI, fig. 8. "Leaves long'-petioled, suborbicular or transversely elliptical, slightly cuneate at the base, and apiculate at summit; lower half of leaf entire; superior half, or more, very regularly and rather finely obtusely serrate, or crenate, the points of the teeth inclining upward; primary nerves usually five, sometimes three, radiating from the base at equal angles; from these the secondary nerves spring at acute angles." This is an exceedingly neat and well-defined species, very fully repre- sented in Dr. Hayden's collections. It is symmetrical in form, broader than high, forming a transverse ellipse, from the opposite sides of which rise the corresponding and equal projections of the apiculate summit and slightly decurrent base. The crenation of the upper portion of the leaf is very regular and neat, the teeth of small size, and turned upward. The general aspect of the leaf is not very different from that of some specimens of the living P. tremuloides, but the entire margins at the lower half of the leaf, the more elliptical outline, shorter point, and larger and more regular teeth, mark its specific differences with sufficient distinctness, while the corre- spondence which the leaves of the two species present in the general charac- ters of form, nervation, and crenation, affords satisfactory evidence of generic identity. In the Tertiary plants collected by Dr. Hayden on the upper Missouri a species of Populus occurs (P. rotundifolia), which exhibits a striking resem- blance in general form to that now under consideration. In that species, however, the crenation of the superior margin is uniformly coarser and less acute, and the nervation is more delicate. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. 44 THE LATER EXTINCT FLORAS OF NORTH AMERICA. POPULUS FLABELLUM Newb PI. XX, fig. 4. Boston Journ. Nat. Hist., Vol. VII. (1863), p. 524. "Leaves flabellate, orbicular or reniform, obtuse, wedge-shaped at base, slightly decurrent onto the petiole. Margins entire or waved; princi- pal nerves three, two lateral ones reaching nearly to the summit; secondary nerves fine, flexuous, forked." There is no living species of Populus of which the normal form of the leaves approaches very closely to that of those under consideration, though one, three-nerved like these, may be occasionally found among the round-leaved poplars. Among the Tertiary plants collected by Dr. Hayden on the Yellowstone is a species, yet unpublished, very much like this, both in the form and nervation of the leaves, and among the Cretaceous plants collected by him in Nebraska is another nearly equally like it; but in both these the upper margins of the leaves are more or less crenulated. Formation and locality: Cretaceous (Puget Sound group). Chuckanutz, near Bellingham Bay, Washington. Populus genetrix Newb. PL XXVII, fig. 1. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 64; Ills. Cret. and Tert. PI. (1878), PL XII, fig. 1. "Leaves large, cordate in form, acuminate; margins serrate, with rather small appressed teeth; three-nerved; nervation sparse but strong; midrib straight, with few small branches; basilar nerves very strong, given off at an acute angle, much branched at the summit, reaching nearly to the margin far above the middle ; from each of the basilar-lateral nerves spring five to six exterior branches, the lower ones very strong and branched, the upper slender and simple." In general aspect this leaf is very similar to that of the living P. bal- samifera, and apparently differs from it only in its nervation. It is more decidedly three-nerved than those of any of the living group which it may be supposed to represent — P. balsamifera, P. candicans, P. monilifera, etc.; yet one may occasionally find a leaf of either of these species which in this respect approaches the fossil before us. The dentation of the margin is DESCRIPTIONS OF SPECIES. 45 essentially that of P. balsamifera, and it can hardly be doubted that we have here the progenitor of one or more of the group of poplars with which I have compared it, and which now grow in the region where these fossil plants were collected. The different species of Populus among the Tertiary plants collected by Dr. Hayden are far more generally three-nerved than are the living species which now inhabit this country. In this respect they resemble more the foreign P. alba; and it may be said that the majority of species described in this memoir are more closely allied to the section Coriaceae than to the Balsamitae. Professor Schimper, in his Paleontologie Vegetale, Volume II, page 690, refers this species to Populus balsamoides Groepp., basing this conclusion upon manuscript information received from Professor Heer. It is impossible, however, to harmonize the discrepancies which exist between the specimens before us and the figures and descriptions of Professor Heer. (Fl. Tert. Helv., Vol. II, p. 18, PI. LIX; LX, figs. 1-3; LXIII, figs. 5, 6; Vol. Ill, p. 173.) In all the figures and descriptions given of P. balsamoides the medial nerve is far stronger than the lateral nerves. These form many pairs, of which the lower reach the margins below the middle of the leaf. On comparing the figure now given it will be seen that the differences are very marked, for the leaf of P. genetrix is practical^ three-nerved; at least the midribs and the two chief lateral nerves are nearly of equal strength. The lower pair of lateral nerves may be considered as mere branches of the second pair. From these differences I am compelled to regard P. genetrix and P. balsamoides as distinct species. Formation and locality: Tertiary (Eocene 1). Banks of Yellowstone River, Montana. Populus litigiosa Heer. Pi. Ill, fig. 6. Nouv. Mem. Soc. Helv. Sci. Nat., Vol. XXII (1866), p. 13, PI. I, fig. 2; Ills. Cret. and Tert. PI. (1878), PL III, fig. 6. The specimen of which the figure is cited above is that of which a tracing was sent by Mr. Meek to Professor Heer, and on which he based his description. This specimen is too imperfect to furnish a full diagnosis 46 THE LATER EXTINCT FLORAS OF NORTH AMERICA. of the species or to afford comparison with the other fossil plants with which it is associated. It is evident, however, that the general form of the leaf and the char- acter of the nervation are similar to those of P. cyclophylla Heer, but it would seem that the margin is somewhat waved, and the nervation is rather more open than in the larger specimens of the species with which I have com- pared it. The basal pair of nerves also form a slightly greater angle with the midrib, and branches given off from them below are longer, supplying a broader expanse of the leaf. Like several of the other less common leaves of the Dakota group, these must remain as somewhat doubtful material until further collections shall add to our knowledge of them. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. PoPULUS MICROPHYIXA Newb. PL III. fig. 5. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 186S), p. 17; Ills. Cret. and Tert. PI. (1878), PL III, fig. 5. " Leaves very small, scarcely an inch in length, roundish in outline, somewhat wedge-shaped at base, where they are entire; the upper part of the leaf rounded and deeply toothed, teeth conical, acute or slightly rounded at the summits; nerves radiating from the base, branching above, the branches terminating in the dentations of the margin." This very neat species, from the collection made by Dr Hayden, might be supposed to be only a form of P. elliptica, with which it is asso- ciated, but a number of specimens of each show no shading into each other, and it is scarcely possible that so wide a variation of marginal denta- tion should exist in the same species. Although the leaves of P. elliptica are two or three times as large as those of the species under consideration, the teeth of the margins are less than half the size and are of a different type, being inclined upward, the sides of each tooth of .unequal length, while the dentations of P. microphylla are conical in outline, with nearly equal sides. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. DESCRIPTIONS OF SPECIES. 47 Populus Nebrascencis Newb. PL XXVII, figs. 4, 5. Ann. N. Y. Lye. Nat. Hist,, Vol. IX (April, 1868), p. 62; Ills. Cret. and Tert. PL (1878), PL XII, figs. 4, 5. " Leaves long-petioled, 2 to 3 inches long, ovate, pointed, regularly rounded at the base, coarsely and irregularly toothed except near the base where the margins are entire; nervation strong, radiating from the base of the leaf; medial nerve straight, simple (or supporting very small nerves), except near the summit, where two or three larger branches rise from it; lateral nerves, two pairs on each side, springing from a common point of origin; lower pair arched upward, nearly parallel with the margin of the leaf, to which they send off one or more simple branches; second pair of laterals diverging from these at an angle of 30 degrees, arching upward, and running parallel with the midrib, terminating in the margin near the summit, each giving off about three exterior branches, which curve upward and terminate in the dentations of the border." This species, by its general form and nervation, approaches closely to P. smilacifolia, but the base is rounded (sometimes slightly wedge-shaped), never distinctly cordate; the superior lateral nerves are not quite so much drawn together toward the summit, and the margins are differently and much more coarsely dentate. A large number of specimens of this species present constant and distinctive characters. They exhibit considerable variation in size, being from 1 to 3 inches in length, but in form, nervation, and marginal dentation they are alike. These specimens, from the collections made by Dr. F. V. Hayden, are derived from different localities, and without doubt represent a distinct species which was spread over the Tertiary continent. By the character of the impressions left on the stone, as well as by the coarse and unequal dentation of the margins, we may infer an affinity between this and the downy-leafed poplars of the present epoch, such as P. alba of Europe, etc., while in the smooth surface and finely denticulate or entire • margin of P. smilacifolia we have evidence of resemblance to P. tremuloides. 48 THE LATER EXTINCT FLORAS OF NORTH AMERICA. There is no fossil species for which this can well be mistaken. Some of the forms of P. crenata Unger (Foss. Fl. Sotzka, p. 166 [36], PI. XXXVI [XV], figs. 2-5) resemble these leaves, but they are not so dis- tinctly radiate nerved. Unger represents the teeth of the margin as more acute, and more like those of P. tremula, with which he compares his fossil species. Some varieties of Populus Zaddachi Heer (Fl. Tert. Helv., Vol. Ill, p.. 307; Fl. Foss. Arct., Vol. I, p. 98, PL VI, figs. 1-4; XV, fig. lb) are somewhat like this species, and it has been suggested by Mr Lesquereux that they are identical; but in all the figures of that species published the margins are serrate-dentate, whereas in the leaves before us they are much more closely crenate-dentate; also most of the leaves are cordate at the base, and this is a feature given by Heer in his description, but among quite a large number of the leaves of P. Nebrascencis which have served as a basis for the specific description, the form is ovate, the base rounded, some- times a little produced, but never cordate or even emarginate. Formation and locality : Tertiary (Eocene?). Banks of the Yellowstone River, Montana. Populus nervosa Newb. PI. XXVII, figs. 2, 3. Ann. N. Y. Lye. Nat. Hist,, Vol. IX (April, 1868), p. 61; Ills. Cret. and Tert. PI. (1878), PL XII, figs. 2, 3. "Leaves rounded in outline, margins nearly entire, or slightly serrate at the base, sharply but not deeply toothed on the sides, on the summit strongly doubly serrate, with a tendency to become three-lobed; nervation strongly marked and crowded; basal nerves springing from the midrib above the margin, given off at an angle of 30 degrees or more, reaching the margin above the middle, where they terminate in the most prominent teeth or lobes; from these basilar nerves are given off five or six strong lateral nerves, which arch upward and, more or less forked, terminate in the mar- ginal teeth ; above the basilar nerves three or four pairs of strong lateral nerves are given off from the midrib, which run parallel with the basilar pair, and terminate, like them, in the compound teeth of the upper margin. The lateral nerves are connected by numerous strong secondary nerves, DESCRIPTIONS OF SPECIES. 49 which are generally simple and slightly arched, sometimes broken, and anastomosing with each other. This latter character gives a lattice-like appearance to the leaf, to a degree unusual in the genus." Collected by Dr. F. V. Hayden. The strong nervation of this species is one of its most marked charac- ters, and has suggested the name given to it. By this and the double den- tation of the superior margin, as well as by their acerine form, these leaves are easily distinguishable from any of those with which they are associated and any hitherto described. Formation and locality: Tertiary (Eocene 1 ?). Banks of Yellowstone River, Montana. POPULUS NERVOSA ELONGATA Newb. PI. XXVIII, fig. 1. Populus nervosa var. B. elongata Newb. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 62 ; Ills. Cret. and Tert. PI. (1878), PL XIII, fig. 1. "Leaves ovoid or oblong in outline, wedge-shaped at base, abruptly pointed at summit, basal margins entire, sides rather finely toothed, superior margin, coarsely, somewhat doubly dentate; nervation strongly marked, less crowded than in var. A.; basal nerves springing from the midrib above the basal margin nearly straight, reaching the sides above the middle and terminating in the first large dentations of the upper margin; exterior lateral nerves of the basal pair, three or four in number, remote, nearly simple, curved upward, and terminating in the lateral teeth; secondary nerves above basal pair, three on each side of the midrib, parallel with the basal pair, and connected with them, each other, and the midrib, by numerous strong, generally simple, lattice nerves." Collected by Dr. F. V. Hayden. The nervation of these leaves is essentially the same as that of those last described, and which, notwithstanding the difference of form that they represent, I am inclined to consider as belonging to the same species. This diversity of form is not greater than may be seen in the leaves of any poplar tree, and the differences of dentation are not greater than those observed in different leaves of many living and fossil species. The origin of the large basilar nerves above the base of the leaves, the strong and mon xxxv 1 50 THE LATER EXTINCT FLORAS OF NORTH AMERICA. latticed nervation, and the dentation of the same general character, with the fact that all the specimens are from the same locality, all combine to lead me to consider the two forms as specifically identical Formation and locality: Tertiary (Eocene!). Yellowstone River, Mon- tana. POPULUS POLYMORPHA, Newb. PI. XL VI, figs. 3, 4; XLVII, fig. 4; XLIX, figs. 4, 7, 8, 9 [misprinted 1]; LVIII, fig. 4. Proc. IT. S. Nat. Mus., Vol. V (March 21, 1883), p. 506. "Leaves petioled, ovate, rounded or slightly wedge-shaped at the base, acute or blunt-pointed at the summit; margins coarsely and irregularly crenate, dentate, or crenate-dentate ; nervation strongly marked, pinnate; in the more elongated forms, about eight branches on each side of the midrib given off at an acute angle; in the broader forms the lower nerves issue at nearly a right angle; the upper ones at an angle larger than in the preceding form." The leaves of this tree are the most numerous of all represented in the collection from Oregon made hj Rev. Thomas Condon, several hundred in greater or less completeness being included in the specimens which have been passed in review. They show a marked diversity of form, some being long ovoid or elliptical, rather pointed at base and summit; others ovoid or roundish with a rounded base ; some are light and delicate, others have strong nerves, and evidently were thick and leathery in texture. More generally a base similar to that on PI. XLIX, fig. 9, accompanies a summit coarsely dentate or crenate. It is with some hesitation that this leaf has been referred to Populus, but it presents greater affinities in nervation and marginal markings with this group than any with which they have been compared. The general aspect of the leaf represented on PL XLVI, fig. 4, is quite that of some of the poplars, particularly of the group represented by the abele (P. alba, L.), while the specimens figured on PI. XLIX, figs. 4 and 7, and PI. XLVII, fig. 4, are so different from the prevailing style of poplar leaves that the propriety of referring them to this genus seems questionable. There are, however, connecting links between all these different forms, and the general DESCRIPTIONS OF SPECIES. 51 resemblance of the group to the leaves of the poplars is strong enough to warrant their provisional association. Among the fossil leaves which have been described as species of Populus some of the many forms of P. mutabilis Heer show a considerable resem- blance to these before us, and one phase of Populus leucophylla Ung. (Fl. Gleichenberg, p. 177 [21], PI IV, figs. 6-9), especially that represented in fig. 9 of the plate cited, could hardly be distinguished from some of the Bridge Creek leaves Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Populus khomboidea Lesq. PI. XX, figs. 1, 2. Am. Journ. Sei , Vol. XXVII (1859), p. 360. In the collection of the Northwest Boundary Commission are numerous specimens which I have referred with some doubt to species of Populus described by Lesquereux. My specimens are, however, too imperfect to permit me to decide with certainty the question of their identity. Asso- ciated as they are with Inoceramus, there can be no reasonable doubt of their Cretaceous age. Among the fossil leaves brought from Orcas Island, there are some which bear considerable I'esemblance to these, but they are too imperfect to render the comparison satisfactory. Formation and locality: Cretaceous (Puget Sound group). Nanaimo, Vancouvers Island. Populus rotundifolia Newb. PI. XXIX, figs. 1-4. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 506; Ills. Cret. and Tert. PI. (1878), PI. XIV, figs, l-i, under P. cuneata. "Leaves of small size, rarely more than an inch in diameter, approxi- mately circular in outline, either quite round or transversely or longitudi- nally elliptical; slightly wedge-shaped at the base, and decurrent on the long petiole; basal margin entire; upper half of leaf coarsely crenate, dentate, and usually short pointed at the summit; nervation flabellate, con- sisting of a median and two principal lateral nerves, which give off numer- ous branches " 52 THE LATER EXTINCT FLORAS OF NORTH AMERICA. When the leaf is more than usually elongated, as in fig. 3, the basilar nerves spring from the midrib a little below the junction of the main lateral branches. The normal form is well represented in fig. 1, but it is not unu- sual to see those which are slightly flabelliform, like fig. 4. The tissue of the leaf would seem to have been thick and leathery, since the surfaces are unusually smooth, and the nerves sunk in the parenchyma are often scarcely perceptible. The leaves described above present some anomalies in form and struc- ture as compared with most of our poplars, since they are frequently fla- belliform, and were apparently of much thicker and denser tissue than those of any living species. They present, however, a marked resemblance to those described and figured in this report under the names of P. elMptica and P. flabellwm, one from the Dakota group of Kansas, the other from the Upper Cretaceous of Orcas Island on the northwest coast, and P. cuneata from the Tongue River Tertiary; and all the group, in form, nervation, and serration, have sufficient likeness to some of the living poplars, particularly to P. tremuloides of America and P. pruinosa of Songaria, to warrant their being included in the same genus. There are some tropical trees of which the leaves present considerable resemblance to our fossils, especially one of the Proteacese (Adenanthos cune- atus of Australia), the leaves of which are small, cuneate at base, rounded at summit, where they are coarsely crenate, having almost precisely the form of one of the specimens of the fossil in question. This is, however, apparently an abnormal form, and the similarity which I have noticed is perhaps accidental and certainly of little value. The nervation of these fossil leaves is considerably different from that of Adenanthos, and a mere resemblance in form, however close, would hardly warrant us in supposing that the fossil plant could have any very near affinity with one so far removed geographically and botanically from the flora with which it is associated. Probably all the specimens represented by figs. 1, 2, 3, and 4 belong to one species, though that from which fig. 3 was taken was obtained in a different locality from any of the others and has a somewhat different aspect. Taken by itself this might readily be supposed to belong to a rosaceous plant, perhaps a Rubus, Pyrus, or Crataegus; but it would be difficult to find its exact counterpart in any living species of these genera. It is perhaps DESCRIPTIONS OF SPECIES. 53 safer to consider it only an unusual form of fig. 1 and refer it provisionally to the same species. Its geological value will be secured by the truthful figure given of it. Formation and locality: Tertiary (Eocene?). Yellowstone River, Mon- tana; Fort Union, Dakota; Carbon Station, Wyoming. POPULUS SMILACIFOLIA Newb. PI. XXIX, fig. 5. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 66; Ills. Cret. and Tert. PI. (1878), PI. XIV, fig. 5. "Leaves ovate, pointed, slightly cordate at the base; margins finely and obtusely crenulated; nervation radiate, delicate and sparse; medial nerve straight, giving off only fine and scarcely perceptible lateral nerves below, and two or three longer branches near the summit; two pairs of lateral nerves radiate with the medial nerve from the same point at the base of the leaf; of these the lower two are small, nearly simple, and arched evenly upward ; the other two, nearly as strong as the midrib, spring from the base at an angle of about 25 degrees, and after diverging to the middle of the leaf, curve upward toward the summit, near which they terminate in the margins. These lateral nerves support four or five simple or once-forked branches, each given off exteriorly, which curve upward, and terminate in the lateral margins. The tertiary nerves are given off nearly at right angles from the secondaries and form a delicate polygonal or quadrangular network over the surface of the leaf." Collected by Dr. F. V. Hayden. The lower pair of lateral nerves should properly be considered as branches of the larger ones, so that the leaf is more distinctly three- veined than that of any living species of Populus. This character, with the smooth surface and nearly entire margins, gives these leaves the general aspect of those of Smilax and suggested the name given them. Their nervation, however, is sufficiently distinct from that of Smilax, and is clearly that of Populus, though in a somewhat exaggerated form. In Smilax three or five nerves radiate from the base of the leaf and terminate together at the summit, which those of the leaves of Populus never do. In Smilax, too, the principal nerves give off no large branches, but all the 54 THE LATER EXTINCT FLORAS OF NORTH AMERICA. interspaces are filled with a labyrinth of anastomosing veins, forming- a very different network from that of Populus. The marginal serration of the present species would seem to have been much like that of the leaves of the living P. tremuloides, but still finer, while the size of the leaf was considerably larger. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. PoPULITES ELEGANS Lesq.? PI. VIII, fig. 3. Am. Journ. Sci., Vol. XLVI (July, 1868), p. 94. Note. — So identified by Dr. Newberry, as indicated by memorandum on the margin of the plate. — A. H. Formation and locality: Cretaceous (Dakota group). Fort Harker, Kansas. Salix angusta Al. Br.? Pi. LXV, fig. 2. In Bruckm. "Fl. Oening. Foss." Wiirtemb. Naturwiss. Jahresh. (1850), p. 229. S. angustifolia Al. Br., inBuckland, Geol. and Mineral., p. 512 (1837). » A very narrow-leaved willow; is exceedingly common in the Green River beds, some slabs of the rock being quite covered with the leaves. These are narrow, lanceolate, tapering gradually to a long and strong petiole and to a long, narrow, and acute point above. The margins are entire and sharply defined, the midrib strong, the lateral nerves numerous and fine. In general form these leaves agree very well with the excellent figures of Salix angusta, given by Heer in his Fl. Tert. Helv., Vol. II, p. 30, PI. LXIX, figs. 1-11, but the base is in our specimens narrower, so much so that the blade seems to be decurrent on the petiole. The leaves from Green River apparently represent the same species as that figured by Lesquereux, (Tert. Fl., p. 168, PI. XXII, figs. 4, 5) but perhaps not that shown in fig. 5, as in all the many specimens now before me the base is narrower and more 1 The oldest published name for this species is S. angustifolia Al. Br., 1837, but this name was preoccupied by the living species. This fact was apparently recognized by Braun, as he sub- sequently changed it to S. angusta, which is here adopted.— A. H. DESCRIPTIONS OF SPECIES. 55 wedge-shaped than the latter. Unfortunately the specimen represented in fig. 4 has the base and summit broken away, and the identification is therefore not absolutely certain, but as it was obtained in the same region where Dr. White collected the narrow-leaved willows before us there is every probability that they are the same. Whether the narrow-leaved willow of the Green River beds is identical with that found in the so-called Miocene or Oeningen is, however, an open question. That both are willows there can be no reasonable doubt, but the leaves of so many species of willow are narrow lanceolate with tapering bases and summits that it is quite impossible to be sure of an identification based on a mere general resemblance. All we can say, therefore, is that during the deposition of the Green River Tertiary beds willow trees grew on the banks of the rivers and lakes of that region, having long, narrow leaves with simple margins and undistinguishable by any well-marked character from those obtained from the Tertiary of Oeningen. 1 Formation and locality: Tertiary (Green River group). Green River, Wyoming. Salix cuneata Newb. PL II, figs. 1, 2. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 21; Ills. Cret. and Tert. PI. (1878), PI. I, figs. 1, 2 [fig. 1 under Salix Meehii]. "Leaves of medium size, sessile or short-petioled, entire, elongate, narrow, acute at both ends, broadest toward the apex, gradually narrowed below to the base; medial nerve distinct; secondary nerves delicate, springing from the midrib at an angle of about 20 degrees near the middle of the leaf, 15 to 20 degrees below, straight and parallel near the bases, gently arched above and inosculating near the margins." Collected by Dr. F V. Hayden. This species presents some marked characters by which it may be dis- tinguished from those before described. It is true that the variations of form among the leaves of our recent species of willow are almost infinite, and even in the same species and from the same tree leaves may be obtained i A comparison of our figure with those of Heer and Lesquereux leads me not only to doubt their identity, but to think that ours is more likely to be a Eucalyptus. The marginal nervation is certainly more characteristic of the latter genus than of Salix. — A. H. 56 THE LATER EXTINCT FLORAS OF NORTH AMERICA. of such different aspect that, taken separately, they might readily be mis- taken for those of different species. Since the difficulty in the determina- tion of recent willows is so great that it has become proverbial, specific distinctions derived from the leaves only, especially in those obtained from the same locality, may justly be looked upon with suspicion. Here, as elsewhere, however, it is probable that recent botany will derive some aid from the careful study of fossil plants, and the nervation will probably be found to afford constant characters where the outlines of the leaves can hardly be relied on. It may be seen by reference to the foregoing descriptions of Salices that a number of characters combine to distinguish what, for geological convenience, I have chosen to regard as distinct species. Salix Meekii is lanceolate, tapering nearly equally to both ends, which are alike acute; this leaf is petioled and the nervation regular and delicate. 8. flexuosa is sessile, linear, and rather abruptly narrowed to point and base; nervation obscure, apparently very delicate and uniform. S. cuneata is comparatively thick and leathery, the form symmetrical, lanceolate, pointed, but scarcely acute at both ends; the midrib strong, prolonged into a short, robust petiole; secondary nerves unequal, given off at a large angle, thick at base, slender, tortuous, and irregularly confluent near the margins. In S. membranacea the leaves are large and thin, broadest near the base, which is rounded, summit long-pointed and acute ; nervation distinct and regular, but delicate. Formation and locality: Cretaceous (Dakota group). Mouth of Big Sioux River, Nebraska. Salix flexuosa Newb. PI. II, fig. 4; XIII, figs 3, 4; XIV, fig. 1. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 21.; Ills. Cret. and Tert. PI. (1878), PI. I, fig. 4. " Leaves narrow, linear, pointed at each end, sessile or very short- petioled; medial nerve strong, generally somewhat flexuous; secondary nerves pinnate, leaving the principal nerve at an angle of about 40 degrees, somewhat branched and flexuous, but arching so as to inosculate near the marsrins." DESCRIPTIONS OF SPECIES. 57 This is perhaps only a variety of S. Meekii, which it resembles in its nervation, as far as can be observed in specimens fossilized in sandstone, but, although much narrower in its general form, it is less acuminate at either extremity, and is apparently sessile. As in some of our living narrow-leaved willows, these leaves are generally somewhat flexuous, and as they are seen lying in their natural curves on the surfaces of the rock they have as familiar and perfectly willowlike a look as leaves of Salix angustifolia would if artificially fossilized in the manner followed by Goeppert. Since the above description was written I have collected this species from a number of widely separated localities and found it to hold its char- acter with great constancy. Formation and locality : Cretaceous (Dakota group). Big Sioux River, Blackbird Hill, Cedar Spring, etc., Nebraska, and Whetstone Creek, New Mexico. Salix foliosa Newb. n. sp. PI. XIII, figs. 5, 6. Leaves long-petioled, broadly linear ; 8 to 9 inches long by 1 inch wide ; suddenly narrowed to the base ; acute at the summit ; margins entire, sometimes undulate; nervation delicate. Leaves of this species occur in great abundance on the banks of Whetstone Creek in northeastern New Mexico, and characteristic figures are given of specimens collected by myself in that locality. The leaves are larger than those of any other known Cretaceous Salix, unless it be S. membranacea ; but it differs from that in its leaves being wedge-shaped instead of rounded at the base. From the locality referred to, where the fossils are contained in a fine- grained, light-colored sandstone, in which the most delicate tissues would be preserved, we may expect the fruit of these and other fossil plants to be discovered, with a decided illumination of the botanical affinities of the plants of the Dakota group. Formation and locality : Cretaceous (Dakota group). Whetstone Creek, New Mexico. 58 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Salix Meekii Newb. Pi. II, fig. 3. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 19; Ills. Cret. and Tert. PI. (1878), PL I, fig. 3 [under 8. cuneata]. "Leaves petioled, thin and delicate, lanceolate, acute at both ends, nervation delicate, midrib slender, secondary nerves fine, springing from the medial nerve at an angle of 35 degrees, gently arched and anastomosing near the margins; network of tertiary veins somewhat lax, but composed of nervules of such tenuity as to be rarely visible." This is the plant of which an outline sketch was sent Professor Heer bv Mr. Meek. In that sketch the general form was alone given, the details of nervation, as well as the texture of the leaf, not being deducible from it. Professor Heer considered it a Laurus, and as probably identical with Laurus primigenia Ung., a common species in the Tertiary of Europe. Aside from the a -priori improbability of this plant, found in the Middle Cretaceous rocks, being identical with one which in the Old World dates back no further than the Miocene, there are characters in the fossil itself which seem to separate it from even the genus Laurus. The nervation has a different aspect from that of any of the Lauracese with which I am acquainted, being both more lax and delicate, the secondary nerves less accurately arched, and their summits more wavy ; the patterns formed by their anastomosis less regular and determinate. In these respects, as well as in its comparatively thin and delicate texture, it resembles much more the willows than the laurels. It seems hardly worth while to compare the plant before us with any of the living willows, for everything indicates that all the species of the Cretaceous, both vegetable and animal, long since perished Among the great number of fossil species found in the Tertiary strata there are several which have a general resemblance to it and from which it might be unwise to regard it as distinct if they were from the same formation. Salix elongata Web. (Palseontogr. (1852), PI. XIX, fig. 10) has nearly the same form, but the secondary nerves are given off at a larger angle and are much more arched. From its associate species in the Cretaceous strata it seems not diffi- cult to distinguish it, Salicites Hartigi Dunker ( Palaeontogr. (1856), p. 181, DESCRIPTIONS OF SPECIES. 59 PI. XXXIV, fig. 2) is apparently much. more strongly nerved. The gen- eral form was perhaps similar, although Bunker's specimen wants both point and base. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Salix membranacea Newb. PI. II, figs. 5-8, ' 8a. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 19; Ills. Cret. and Tert. PI. (1878), PI. I, figs. 5-8a [fig. 8a not named on plate]. "Leaves petioled, large, smooth, and thin, lanceolate, long-pointed, rounded or abruptly narrowed at the base, near which they are broadest; margins entire; medial nerve slender, often curved, secondary nerves remote, very regularly and uniformly arched from their bases, terminating in or produced along the margins till they anastomose; tertiary nerves given off nearly at right angles, forming a very uniform network of which the areoles are polygonal and often quadrate." This is a strongly marked species, collected by Prof. George H. Cook, of which I have specimens fossilized in fine clay and exhibiting with great distinctness all the details of nervation. It was evidently thin and mem- branous in texture, though attaining a large size. Like most of the willows, it is frequently unsymmetrical, one side being most developed and the midrib curved. The leaf is broadest near the base, and is -thence narrowed into a long and acute point. Formation and locality: Cretaceous (Raritan). Amboy Clays, Raritan River, New Jersey. Order BETULACE-ffi. Carpinus grandis Ung. PI. LIV, fig. 3, in part ; LV, fig. 6. Synop. Foss. PI. (1845), p. 220. Leaves which seemed to represent this very widespread species of Carpinus were collected by Professor Dana at Birch Bay, near the mouth 1 This specimen may also be found figured in Flora of the Amboy Clays, PI. XXIX, fig. 12. (Mon. U. S. Geol. Surv., Vol. XXVI.)— A. H. 60 THE LATER EXTINCT FLORAS OF NORTH AMERICA. of Frazer River, and appear in PL XXI, fig. 10, of the Atlas which accompanies the Geology of the Wilkes Exploring Expedition. Upon the same slab are seen the branches of Glyptostrobus Ungeri (!), the branchlets and cone of Taxodium distichum miocenum, leaves of Rhamnus Gaudini (?), and Smilax cyclophytta Newb. Some of these are reproduced on PI. LIV, fig. 3 (Carpinus and Smilax); PI. LV, figs. 3 to 6 (Glyptostrobus, Tax- odium, Carpinus). Very few fossil plants were brought from this locality, but they seem to represent a horizon somewhat different from that which has supplied any other specimens in the collection. Leaves of various kinds appear to be exceedingly abundant and beautifully preserved there, and it is to be hoped that the locality may be visited by some other collectors, who shall bring us a fuller representation of its riches. Formation and locality : Tertiary (Eocene !). Birch Bay, Washington. Corylus Americana fossilis Newb. PI. XXIX, figs. 8-10. Corylus Americana Walt. Newb. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 59; Ills. Cret. and Tert. PL (1878), PI. XIV, figs. 8-10. Among the variety of specimens of the leaves of C. Americana with which I have compared these fossils, there are some which, if fossilized, would form impressions absolutely undistinguishable from them, and I have therefore found it impossible to fix upon any characters by which they can be separated. As compared with the fossils which I have referred to C. rostrata, these leaves are a little more rounded in outline, the nervation somewhat more open and delicate, the marginal teeth more nearly equal in size, and more obtuse. Of all the species of Corylus, living or fossil, which have been described, there is none of which the leaves so much resemble the ones under consid- eration as do those of C. Americana. Collected by Dr. F. V. Hayden. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. DESCRIPTIONS OF SPECIES. 61 Corylus MacQuarbii (Forbes) Heer. PI. XXXII, fig. 5; XLVIII, fig. 4. Alnites ? MacQuarrii Forbes. Quart, Journ. Geol. Soc. London, Vol. VII (1851), p. 103, PI. IV, fig. 3. Corylus MacQuarrii Heer. Urwelt. d. Schw. (1865), p. 321. Corijlus grandifolia Newb. Ann. N. Y. Lye. Nat. Hist. , Vol. IX (April, 1868), p. 59 ; Ills. Cret. and Tert. PI. (1878), PI. XV, fig. 5. "Leaves large (5 to 6 inches long), short-petioled, unequally cordate at the base, pointed above, coarsely and unequally dentate; nervation strong midrib straight or curved, not sinuous; lateral nerves, six to seven pairs; lower pair diverging at a larger angle than the upper ones, and sup- porting a number of short, generally simple, branches, on the lower side, which terminate in the basal margin; second pair diverging at an angle of 45 degrees, reaching the margin about the middle, supporting about four branches on the outside; upper pair simple or branched once, rarely twice." Collected by Dr. F. V. Hayden. This was evidently a large, thick, roughish leaf, having more the aspect and texture of the leaves of the mulberry than of the hazel. The nervation is, however, much nearer that of the latter genus. Indeed, in all essential characters it is the same as that of the three species of Corylus with which it is associated. The dentation of the margin, also, is acute, unequal, partially double, much more like that of the leaves of Corylus than of any of those with which I have compared it. As is remarked in the description of C. orbiculata, a large amount of material has been collected and described since the description of C. grandi- folia was written, and it has been shown that numerous leaves of Corylus of large size occur in the Tertiary beds of many parts of North America and extend to the European continent. Comparing our specimens with these figures and descriptions, we are led to believe that our C. grandifolia is only a large and strong form of G. MacQuarrii. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. ', longitude 134° 19', Alaska. Collected by United States steamer Saginaw, Februarv 18, 1869. Alnus serrata Newb. PI. XXXIII, fig. 11. Aim. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 55; Ills. Cret. and Tert. PI. (1878), PL XVI, fig. 11. "Leaves oval or elliptical, slightly cordate at the base, rounded or sub- acute at summit; margins serrate throughout, serrations fine, sharp, and appressed below, coarse and double above; nervation pinnate, strongly marked ; basilar pair of lateral nerves short and simple, upper ones branched near the extremities." Collected by Dr. F. V. Hayden. These leaves have nearly the form of Alnns Kieffersteinii Ung. (Odor. Prot, p. 115, PI. XXXIII, figs. 1—4), and a nervation similar in kind, but more crowded. The marginal serration is also coarser. Formation and locality • Tertiary (Eocene !). Banks of Yellowstone River, Montana. Alnus serrulata fossilis Newb. n. sp. PI. XL VI, fig. 6. Among the leaves from Bridge Creek occurs one very beautifully preserved, which is represented in fig. 6, PL XL VI. It will be seen at a glance that it closely resembles the leaves of A. serrulata, and I have been unable to find any characters upon which to base a distinction. More material will of course be needed before the fact may be considered estab- lished that our most common alder was growing in the Tertiary. There would be nothing- surprising, however, in such a discovery; indeed, it was DESCRIPTIONS OF SPECIES. 67 to be expected that this species, so widespread as it now is, should have some representative in the Tertiary flora. We know that our living flora of North America is the progeny by direct descent of the Tertiary flora, and the result of investigation will undoubtedly be to increase the number of species considered identical in the two floras. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Alnus sp.? Newb. PL XLVI, fig. 7. Note. — Accompanying this figure, on the margin of the plate, and on the specimen label, are memoranda by Dr. Newberry referring it to this genus and giving the locality. Further information in relation to it is lacking. — A. H. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Alnites grandifolia Newb. PI. IV, fig. 2. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 9 (name only); Ills. Cret. and Tert. PI. (1878), PI. IV, fig. 2. Leaf orbicular, with coarsely and obtusely dentate margins ; nervation strong, consisting of a straight midrib with six to seven lateral branches, which are nearly opposite and diverge at less than a right angle with each other. Branchlets spring from these on the outer side; several from the lower pair, two from the second pair, which, like the upper of the two given off from each of the thud pair, terminate in the dentations of the border. The tertiary nerves which connect the secondary branches are imperfectly parallel, somewhat closely approximate and continuous, forming a more regular lattice work than is formed in any of the associated leaves except those of Protophyllum. No complete specimens of this strongly marked leaf have as yet been obtained, and nothing but an approximation can be made to its botanical affinities. It is, however, so distinctly marked that it deserves notice if for nothing else than that the attention of collectors may be drawn to it. It has been provisionally placed in the ill-defined genus Alnites, because it bears considerable resemblance to some of the leaves of Alnus, but perhaps quite as much to those of Hamamelis. The existence of closely related 68 THE LATER EXTINCT FLORAS OF NORTH AMERICA. species of the latter genus in the floras of America and Japan gives reason to suppose that this was an element in the old flora which spread from America into Asia and Europe, and therefore gives a probability of its being found in the Tertiary and even Cretaceous flora. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Order FAGACEiE. Fagus cretacea Newb. PL I, fig. 3. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 23 (named, but not specifically described); Ills. Cret. and Tert. PI. (1878), PI. II, fig. 3. Leaves 2 to 3 inches in leugth, ovate in outline, pointed above and below, petioled, nervation sharply defined, regular, lateral nerves parallel, straight below, gently arched above, terminating in the margins, which are sometimes gently undulate, the nerves terminating in the prominences of the margins; in other leaves the margins are quite entire and nothing of this last-mentioned character is seen. Collected by Dr. F. V. Hayden. This pretty species is represented in the collection by but a single specimen. This is, however, remarkably well preserved, giving the general form and the details of nervation with great distinctness. From the char- acter of the nervation I have little hesitation in referring it to the genus Fagus. Some of the Rhamnacese, particularly species of Rhamnus and Frangula, have leaves which would be very like the one before us if fossil- ized; but in the fossil plant the lateral nerves are sharply defined, numerous, almost perfectly parallel among themselves, and run quite to the margins, which are seen to be slightly waved, the termini of the nerves being most prominent and the intervals between them forming shallow sinuses. In Rhamnus, however, even in B. frangula, of which the leaves so much resemble this, the margins are not waved and the lateral nerves do not terminate as distinctly in them as they do in Fagus and in our fossil. A striking similarity may be noticed between some of the leaves of the living Fagus sylvatica, and this, though there is no probability of that species having begun its life so early in the history of the globe as the first part of the Cretaceous period. The resemblance is noted only as giving good DESCRIPTIONS OF SPECIES. 69 grounds for the reference of the fossil to the genus Fagus. It will be neces- sary, however, to find the fruit before the fact can be accepted as fully proven of the existence of beeches during the Cretaceous. A large number of fossil species of Fagus have been described from the Tertiaries of Europe by Unger, Dunker, Heer, etc., but the genus has never before been obtained from the Cretaceous formation. Formation and locality: Cretaceous (Dakota group). Smoky Hill, Kansas. Quercus antiqua Newb. PI. XIII, fig. 2. Ann. N. Y. Lye Nat. Hist., Vol. IX (April, 1868), p. 26. "Leaves of medium size, lanceolate in outline, acute, often somewhat flexuous; margins serrate-dentate, with strong, obtuse teeth, which are appressed or turned toward the summit; midrib strong and reaching the apex; lateral nerves numerous, of unequal strength, gently arched upward, terminating in the marginal teeth." The specimens upon which this description is based are fossilized in a somewhat coarse ferruginous sandstone, which has not preserved the minor details of the nervation; but the generalities of form and structure, which are clearly enough shown, seem to indicate that it represented in the Cretaceous flora the chestnut oaks of the present epoch. Several Tertiary species bear considerable resemblance to it, as Q. Mediterranea Ung., and Q Haidingera Ett; but in both these species the marginal dentations are less uniform in size, and, when having a similar outline, are smaller. Formation and locality: Cretaceous (Dakota group). Banks of Rio Dolores, Utah. QUERCUS BANKSLEFOLIA Newb. PI. XVIII, figs. 2-5. Bost. Journ. Nat. Hist., Vol. VII (1863), p. 522. "Leaves very long, linear, lanceolate, long-pointed and acute at either end; margins set with numerous nearly uniform, acute, appressed teeth turned toward the superior extremity; midrib strong, running the entire length of the leaf; lateral veins numerous, simple, strongly marked, parallel, arched upward, terminating in the teeth of the margin; reticulated 70 THE LATER EXTINCT FLORAS OF NORTH AMERICA. nervation buried in the thick parenchyma of the leaf, and generally invisible in the fossil state." This beautiful leaf resembles, in the style and strength of its nerva- tion, those of the living chestnut oak, but is more slender than any other species, living or fossil, which has come under my observation. Among described fossil species Q. Drymeja Ung. (Chlor. Prot., p. 113, PI. XXXII, figs. 1-4), Q. lonchitis Ung. (Fl. Sotzka, PI. IX, figs. 3-8), and Q Saffordi Lesq. (Greol. Survey of Arkansas, p. 319, Tab. VI, fig. 3) seem to approach it most closely, the former two, indeed, being very nearly allied to it; but in these species the leaves are broader and the lateral nerves are more remote. In Q. Saffordi the leaf is, perhaps, equally slender, but the teeth are coarser and less depressed, and the nervation much less strong and regular, resembling in this respect that of the willow oaks (Q. Phellos, etc.). The living species with which our plant may be compared are Q. Xalapensis and, judging from Professor Heer's description of it, Q. Sartorii Liebman. Both of these are from Mexico. Formation and locality: Cretaceous (Puget Sound group). Chucka- nutz, near Bellingham Bay, Washington. QUERCUS CASTANOIDES Newb. PI. LXV, fig. 6. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 506. " Leaf linear-lanceolate, acute, 6 inches long by 1 inch broad; margins remotely and somewhat irregularly set with coarse, in some cases spinous, teeth; nervation strong; midrib straight, sharply defined; lateral branches unequally spaced, simple, forked near the extremity, terminating in the marginal denticles." Only imperfect fragments of this leaf are contained in the collection made by Dr. C. A. White, but these are quite sufficient to show the species to be distinct from any other known. The irregularity in the dentation of the margin and in the spacing of the main nerve branches separate this from the chestnuts and bring it within the genus Quercus, and it would seem to be allied to the living and fossil chestnut oaks. More leaves and the fructification will be needed before a complete description can be written, but it is hoped that the figure now given will serve for its recog- DESCRIPTIONS OF SPECIES. 71 nition, and that since it is plainly different from any of its associates it will be in the future identified and its structure and relations be more fully made out. Formation and locality: Tertiary (Green River group). Green River, Wyoming. Quercus castanopsis Newb. PI. LVI, Fig. 4. Proc. IT. S. Nat. Mus., Vol. V (March 21, 1883), p. 505. "Leaves oblong-elliptical, rounded at the base; nervation regular; midrib straight, branches parallel, simple, terminating in the principal teeth of the margin; margins doubly dentate, the larger teeth receiving the extremities of the nerve branches, and each carrying a minor denticle; .upper surface smooth; texture of the leaf coriaceous." Collected by Mr. S. M. Rothhammer. But a single specimen of this leaf is before us, yet this is so peculiar and strongly marked that it seems to deserve description. In general aspect it closely approaches the leaves of Castanea and- Fagus, but the margins are doubly dentate, a feature I have not found in any of the beeches or chestnuts. It is present, however, in some of the chestnut oaks, as in Q. Olafseni Heer (Fl. Foss Arct., Vol. I, p. 109, PL X, fig. 5; XI, figs. 7-11; XLVI, fig. 10). It seems safer, therefore, to refer the leaf to Quercus rather than to the other genera mentioned. Formation and locality: Tertiary (Eocene!). Yellowstone River, Montana. Quercus consimilis Newb. PL XLIII, figs. 2-5, 7-10. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 505. "Leaves petioled, lanceolate, acuminate, wedge-shaped or rounded at base, where they are often unequal; margins usually dentate, occasionally only undulate, sometimes entire below, denticulate above; teeth acute, often spinous, sometimes short and closely appressed; nervation fine and regular; lateral nerves slender, parallel, generally arched upward; below, where margin is entire, camptodrome; above, craspedodro me, the branches terminating in the marginal teeth; tertiary nervation consisting of minute 72 THE LATER EXTINCT FLORAS OF NORTH AMERICA. branches connecting the lateral nerves either directly or anastomosing, with fine quadrangular network filling the intervals. Fruit ovoid; when mature 2 centimeters in length by 15 millimeters in breadth; cupule scaly, covering nearly half of the glans." Collected by Rev. Thomas Condon. Of the leaves of this species the collection contains many hundreds which show a considerable diversity of size and form; some are only 2 inches in length, others 6; some have the margin acutely toothed through- out, in others the margin of the lower part of the leaf is entire, the upper denticulate; while in others still the margins are entire or gently undulate to near the summit where they are always more or less denticulate. These leaves closely resemble those that have been described under the name of Q. Drymeja Ung. (Chlor. Prot, p. 113, PI. XXXII, figs. 1-4; Foss. Fl. Sotzka, p. 163 [33], PL XXIX [VIII], figs. 1, 2; Heer, Fl. Tert. Helv, Vol. II, p. 50, PI. LXXV, figs. 18-20), and also some of them, those in which the margins are closely and sharply denticulate, are not unlike Q. lonchitis Ung. (Foss. Fl. Sotzka, p. 33, PL IX [XXX], figs. 3-8), but the prevailing character is such as apparently distinguishes them from either of these species or any other described, namely, first, the base broader than in Q. Drymeja, frequently entire for one-third or one-half of the length of the leaf; second, the margins generally denticulate, but sometimes merely undulate or entire except near the summit — a range of variation which does not seem to prevail in the species named. In the figures given on PL XLIII, fig. 2 represents the more common or average form and size, figs. 3, 4, and 5 the more denticulate variety. In order to make the series complete it would have been necessary to occupy the entire plate with representations of the different forms observable in the collection. In many of the specimens the preservation is complete, the outlines being sharply defined, the minutest subdivisions of the nerves being retained. The number of acorns and cupules contained in the col- lection is also large, and while it is possible that not all belong to this species, as it is by far the most > abundant we are compelled to connect the abundant acorns with the numerous leaves. In fig. 7 an immature acorn is shown still attached to the stem; in fig. 8, a detached cupule; in fig. 9, the base of a large acorn; in fig. 10, a large cupule seen from above. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. DESCRIPTIONS OF SPECIES. 73 Quercus coriacea Newb. PL XIX, figs. 1-3; XX, fig. 5. Bost. Journ. Nat, Hist., Vol. VII (1863), p. 521. "Leaves lanceolate, long-pointed, acnte, wedge-shaped at base, decur- rent on the petiole; margins entire, or rarely bearing a few acute teeth toward the summit; nervation strongly marked; midrib strong; lateral nerves numerous, subparallel, branching and inosculating at the summit." This is one of the willow oaks represented among recent species by Q. imbricaria, etc. The figures given illustrate the variations of form exhibited in the collection. From these it will be seen that, with the general character of Q. chlorophylla Ung. and Q. elcena Ung., it is distinct from both, the first being rounded above and with finer nerves, the second larger and narrower, with a nervation finer and closer and the summits of the lateral nerves more distinctly and regularly united. Formation and locality: Cretaceous (Puget Sound group). Chucka- nutz, near Belhngham Bay, Washington. Quercus dubia Newb. PI. XXXVII, fig. 5. Proc. IT. S. Nat. Mus., Vol. V (March 21, 1883), p. 506; Ills. Cret. and Tert, PL, (1878), PL XX, fig. 5, under Phyllites cupanioides. "Leaf ovoid in outline, unsymmetrical ; margins strongly and remotely toothed; teeth subacute or obtuse; nervation delicate; midrib flexuous; lateral branches, about six on a side, somewhat waved, branched, and interlocking, and terminating in the marginal denticles; surface smooth, consistence probably somewhat coriaceous." Collected by Dr. F. V. Hayden. This is a strongly marked leaf which most resembles that of some of the live oaks. The texture was evidently leathery, the surface smooth ; the nervation is that of Quercus or Ilex, as well as the marginal dentation. The species with which it may be compared are Q. aspera Ung. (Chlor. Prot, p. 108, PI. XXX, figs 1-3), Q. Buchii Web. (Pakeontogr. (1852), p. 171 [57], PI XIX [II], fig. 4), and Q ilicoides Heer (Fl. Tert. Helv., Vol. II, 74 THE LATER EXTINCT FLORAS OF NORTH AMERICA. p. 55, PI. LXXVII, fig. 16); but from all these it may be distinguished by its coarse, generally obtuse, marginal denticles. Formation and locality: Tertiary (Eocene!). Tongue River, Montana. Quercus elliptica Newb. PI. XVIII, fig. 1; XX, fig. 3. Bost. Journ. Nat. Hist., Vol. VII (1863), p. 523. "Leaves elliptical or ovate, rounded or somewhat wedge-shaped at base, pointed above; margins entire. Surface smooth, consistence thick and leathery; nervation strong; lateral nerves numerous, diverging at a large angle, slightly arched upward, often sinuous, forked and anastomosing above." In its nervation this species resembles several of the laurel-leaved oaks already described from the Tertiary rocks of Europe, such as Q. nereifolia, Q. Heerii, Q. elaena, etc., but is distinguishable from all these and other otherwise similar species by its broad elliptical or ovate outline. The margins in the specimens before us are apparently entire, but they are probably sometimes toothed, as in most allied species. Formation and locality: Cretaceous (Puget Sound group). Chuckanutz, near Bellingham Bay, Washington. Quercus feexuosa Newb. PI. XIX, figs. 4-6. Bost. Journ. Nat. Hist., Vol. VII (1863), p. 521. "Leaves 4 to 6 inches long, lanceolate, often more or less curved, pointed, acute, narrowed at the base to the petiole; margins somewhat irregularly sinuate-dentate; nervation strongly marked, lateral nerves forked and anastomosing at the summit." This is apparently one of the chesnut oaks, but has not the regularity of nervation which characterizes most of that group, of which Q. castanea may be taken as a type. Among fossil species there are many to which it bears considerable resemblance, such as Q. Gaudini Lesq., Q. Gmelini Ung. Q. urophylla Ung., etc., but from these and all others described it seems to be sufficiently distinct, In Q. Gaudini the secondary nerves are curved and run along DESCRIPTIONS OF SPECIES. 75 the margins. In the other species mentioned they are less numerous and more curved and the marginal teeth are coarser. Formation and locality: Cretaceous (Puget Sound group). Chuckanutz, near Bellingham Bay, Washington. Querous gracilis Newb. PL LXVII, fig. 4. Proc. U. S Nat, Mus., Vol. V (March 21, 1883), p. 504. " Leaves narrow, lanceolate, long-pointed, acute, wedge-shaped at the base; margins set with remote, low, acute teeth ; nervation regular and tine; nerve branches fifteen to twenty on each side, curved gently upward, and terminating in the marginal teeth." Collected by Dr. J. S. Newberry. This is another of the lanceolate, serrate-leaved oaks of which Q. Dry- meja Ung. (Chlor. Protog, p. 113, PI. XXXII, figs. 1-4) may be considered as a type. It differs from that species, however, in its more crowded nervation, smaller teeth, and shallower sinuses. In the figure given the nervation is represented as too strong, and the marginal teeth are not sufficiently acute. Several very beautifully pre- served specimens are before us, which give a very exact and complete view of it, and its resemblance to Q. Drymeja is so strong that if it had occurred in the same horizon and locality there would have been no pro- priety in separating them; but in addition to the differences that have been mentioned, the geological horizons are so different that the probability of finding any identity of species is extremely small. For the present, therefore, it has been thought best to regard this as distinct from the great number of leaves that have been in North America and Europe referred to Q. Drymeja. Formation and locality : Cretaceous (Montana group). Point of Rocks, Wyoming. Quekcus Gronlandioa Heer. PI. LI, fig. 3, in part ; LIV, figs. 1, 2. Fl. Foss. Ai-ct., Vol. I (1868), p. 108, PL VIII, fig. 8 ; X, figs. 3, 4; XI, fig. 4; XLVII, fig. 1. Note. — So identified by Dr. Newberry, as indicated by memorandum on the margin of the plate and on specimen label. — A. H. Formation and locality : Tertiary (Miocene). Cook Inlet, Alaska. 76 THE LATER EXTINCT FLORAS OF NORTH AMERICA. QUERCUS LAUEIFOLIA Newb PL LIX, fig. 4 ; LX, fig. 3. Pioc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 505. "Leaves petioled, lanceolate, 6 inches in length by 1J inches in width, equally narrowed to the point and petiole; margins entire, or faintly toothed, or undulate; nervation regular; midrib strong', straight, lateral branches, about ten pairs, arching gently upward, terminating in the margins." Collected by S. M. Rothhammer, on the expedition of Gen. Alfred Sully. Although reluctant to add one more to the large number of ill-defined species of oak which have been established upon the fossil leaves brought from the far west, this seems to be inevitable, inasmuch as the leaves before us are iu all probability those of Quercus and distinct from any hitherto described. The most striking feature in these leaves is their elegant lanceo- late and symmetrical form, broadest in the middle and narrowing regularly to the pointed base and summit. The craspedodrome nervation and the undulate or faintly toothed margins seem to separate these leaves from Laurus and connect them with the oaks. The figures given but imper- fectly represent the leaves in question, but it is hoped that the description will permit their identification when found. Formation and locality : Tertiary (Eocene ?). Burned shales over lignite beds, Fort Berthold, Dakota. Quercus paucidentata Newb. PI. XLIII, fig. 1. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 505. "Leaves oblanceolate, 6 inches in length by 1£ in breadth, narrowed to the base, sometimes unsymmetrical, long-pointed, and acute at the summit; margins entire below, coarsely toothed above; nervation strong and regular, about ten branches on each side of the 'midrib, which curve upward, festooned below, terminating in the teeth above." Collected by Rev. Thomas Condon. No complete specimens of these leaves are contained in the collection, DESCRIPTIONS OF SPECIES. 77 the one figured being the best. The texture was evidently thick and leathery. The apex is erroneously represented in the figure, as subsequent development of the specimen shows that it terminates in a long-drawn acute point. Among described species this may be compared with Q. Nimrodis Ung. (Foss. Fl. Sotzka, p. 163 [33], PI. XXXI [X], figs. 1-3), and Q. Merloni Heer (Fl Tert. Helv., Vol. II, p. 53, PL LXXVI, fig. 12), but in those species the marginal teeth are stronger and are not, as in this, confined to the summit. The substance of the leaf of the specimens before us was evidently very thick and leathery. Formation and locality : Tertiary (Miocene). Bridge Creek, Oregon. Quercus salicifolia Newb. PI. I, fig. 1. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 24; Ills. Cret. and Tert. PI. (1878), PI. II, fig. 1. "Leaves petiolate, smooth, thick, entire, lanceolate, abruptly pointed at both ends; medial nerve strong, straight, or more or less curved; secondary nerves of unequal size, strong near their points of origin, becoming fine, flexuous, and branching as they approach the margins of the leaf, where some of them inosculate by irregular curves, while others terminate in the margins." Collected by Dr. F. V. Hayden. This species differs considerably in its general aspect from the willow- like leaves with which it is associated, and must have been much thicker and smoother. The midrib is very strong, terminating below in a thick, but short, petiole. The lateral nerves are much less uniform and regular than those of the leaves to which I have referred. They are at first strong, but soon diminish, and many of them extend but halfway to the margin, the others being unequally curved and branching irregularly or anas- tomosing- with each other. The finer details of nervation are not given in the specimens before me, and perhaps more ample material will show that our fossil should not be regarded as a Quercus, but, as far as its characters are given, they agree best with those of that genus. The texture of the leaf was evidently thick and its surface glossy, more so than in any Salix now living; the nervation, too, is more of the oaks than willows; the alternation of larger with smaller secondary nerves, all 78 THE LATER EXTINCT FLORAS OF NORTH AMERICA. diminishing rapidly and irregularly branched aud flexuous above, are characters common to the leaves of all the willow-oaks. Some leaves of the living Q. imbricaria would closely resemble these if fossilized in the same manner. In the Lauracese with lanceolate leaves the nervation is generally much more exact and regular than in the specimen before us, the side nerves being* generally curved gracefully and more or less uniformly upward, their extremities anastomosing, or, more rarely, reaching the margin. If the fine reticulation of the tertiary nerves was distinctly visible there would perhaps be little difficulty in determining with a good degree of certainty the generic relations of this fossil. In the oaks this reticulation is very fine, the areola?, of rather uniform size and quadrangular or polygonal, about as broad as long. In the willows the meshes are larger, more irregular, and more or less elongated. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Quercus simplex Newb. PL XLIII, fig. 6. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 505. "Leaves lanceolate, long-pointed, narrowed, and slightly rounded at the base; margins entire; nervation fine and regular." In collections made by Rev. Thomas Condon at Bridge Creek, Oregon, are numerous leaves similar to that described above. Some are larger, but all present the same characters. The form of the leaf is similar to that of Q. consimilis, with which it is associated and from which it differs only by its entire margin. Since in that species the margins are sometimes nearly entire, it is possible that in the leaves before us that character may be intensified, giving an entire variety. Of this, however, proof can only be obtained by further collections. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Quercus sinuata Newb. PI. XIII, fig. 1. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 27. "Leaves small, obovate in general outline, narrowed to the petiole, or slightly decurrent ; margins deeply lobed, lobes rounded, broader than the DESCRIPTIONS OF SPECIES. 79 .sinuses that separate them, three nearly equal on either side, summit broadly rounded or obscurely lobed, often oblique; nervation strong and simple, midrib straight or slightly flexed, giving off lateral branches, which run to the margins of each lateral lobe." The general form of this leaf is much like that of our living Q. obtusiloba, though it is smaller and more symmetrical. Among the many fossil species which have been described there is none which approaches this very closely, most of them bearing either simple, entire leaves, or toothed, rather than lobed ones. Formation and locality: Cretaceous (Dakota group). Banks of Rio Dolores, Utah. Quercus Sullyi Newb. PL LX, fig. 2. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 506. "Leaves ovate, pointed, wedge-shaped, or rounded at the base; mar- gins set remotely or closely, with acute, spiny-pointed teeth; nervation strong, somewhat flexuous; lower pair of lateral nerves giving off numerous branches; middle and upper pairs simple below, forked at the summit." Collected by S. M. Rothhammer, on the expedition of Gen. Alfred Sully. The characteristics of these leaves are but imperfectly shown in the figure, but the general form, margin, and nervation can be very well made out from the numerous fragments contained in the collection made by the Sully Expedition. It is evident that we have here one of the Ilex-like oaks, and indeed it may be a question whether it is not rather a holly than an oak. The leaf was generally unsymmetrical, the nervation strong but flexuous, the surface roughened by the tertiary nerve branches. In a general way these leaves resemble those of the common evergreen oak, Quercus agrifolia of California, but the spines of the margin are smaller and more numerous, the leaves more elongate and pointed. It is evident, however, that the tree which bore them belonged to the same group of oaks. Formation and locality: Tertiary (Eocene!). Burned shales over lig- nite beds, Fort Berthold, Dakota. 80 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Order ULMACE^E. Ulmus speciosa Newb. PI. XLV, figs. 2-5, 7, 8. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 507. Ulmus pseudo-Americana Lesq., Cret. and Tert. Fl. (1883), p. 249, PI. LIV, fig. 10. "Leaves 4 to 6 inches in length by 2 inches in width, petioled, long- ovoid, or elliptical in outline, pointed at summit; margins coarsely and doubly serrate; nervation strong, regular, fifteen to twenty parallel branches one either side of midrib. Fruit large, 27 centimeters in diam- eter, subcircular, emarginate." This large and fine species of elm is represented by hundreds of specimens in the collection made by Rev. Thomas Condon, and while most are imperfectly preserved, there are some which show all the details of form and structure. The general aspect of the leaves is not unlike that of TJ. Bronnii Ung. (Chlor. Prot, p. 100, PI. XXVI, figs. 1-3), but is fully twice as large and coarsely and doubly serrate. The leaf represented by fig. 8 is one of many which occur in the collection, all presenting nearly the same character; that is, they are smaller than those just described, with much finer marginal dentation. That dentation is, however, double and like that of the larger leaves, though less pronounced, and there are no characters presented by these leaves which would justify us in regarding them as representing a distinct species. For the present, therefore, it has been thought better to leave these as small forms of TJ. speciosa. Among living species TJ. fulva approaches closer to those now under consideration than any other, and the differences between the fossil and living forms are not so great but that we may very well regard one as the progenitor of the other. In TJ. fulva the leaves are smaller and relatively broader, being ovoid in outline, but the character of the marginal dentation and of the nervation is essentially the same. The samara, represented by fig. 7, is supposed to be the fruit of the laro-e elm described above. It is verv similar in size and character to the fruit credited to TJ. Bronnii by Ung., but is somewhat broader. It has not yet been distinctly connected with the leaves we have called TJ. sjpeciosa, DESCRIPTIONS OF SPECIES. 81 but there seems to have been no other tree growing in the locality where these specimens are found of which this could well be the fruit. The fruit of U. fulva has nearly the same form as this, but is only about half as large, while the fruit of U. Americana is still smaller and is obovoid and cilliated. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Planera ckenata Newb. PI. LVII, fig. 3. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 508. "Leaves oblong, ovate; short petioled; 5 centimeters long by 25 millimeters wide; base rounded; summit blunt-pointed; margins coarsely crenate; nervation simple, delicate, six simple branches on each side of the midrib terminating in the crenations of the margin." Collected by Dr. F. V. Hayden. In general aspect these leaves resemble some of the varieties of P. Ungeri, but differ from them in the crenate margins, the lobes being fewer and all rounded. In these respects it differs also from the species described in this volume, P. longifolia Lesq. (PL LVII I, fig. 3), P. variabilis Newb. (PI. LXVI, figs. 5, 6, 7), and P. nervosa Newb. (PI. LXVII, figs. 2, 3). Formation and locality: Tertiary (Eocene ?). Tongue River, Montana. Planera longifolia Lesq. PI. LVIII, fig. 3. Hayden's Ann. Rept., 1872 [1873], p. 371; Tert. Fl. (1878), p. 189, PL XXVII, figs. 4-6. Note.— So identified and located by Dr. Newberry, as indicated by memoran- dum on margin of plate. Further information lacking. — A. H. Formation and locality: Tertiary (Miocene). Florissant, Colorado. Planera microphylla Newb PL XXXIII, figs. 3, 4. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 55; Ills. Cret. and Tert. PL (1878), PL XVI, figs. 3, 4. "Leaves very small, ovate-lanceolate, generally unsymmetrical, curved or falcate, cordate at base, pointed but rarely acute, coarsely and bluntly mon xxxv 6 82 THE LATER EXTINCT FLORAS OF NORTH AMERICA. toothed; nervation strong; lateral nerves diverging at an angle of about 50 degrees in five to six pairs branching toward the summit, and inosculating along the margins; tertiary nerves strong, leaving the secondaries nearly at right angles, much branched and anastomosing to form a coarse and irregular network." Collected by Dr. F. V. Hayden. In its general form this leaf has a striking resemblance to Planera Ungeri Ett. (Abhandl. k. k. geolog. Reichsanstalt. Wien, Vol. II (1851), Foss. Fl. Wien, p. 14, PI. II, figs. 5-18), Ulmus Zelkovafolia Ung. (Chlor. Prot, p. 94, PI. XXIV, figs. 7-13; XXVI, figs. 7, 8), but it is apparently con- siderably smaller, narrower, and more coarsely toothed. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. Planera nervosa Newb. PL LXVII, figs. 2, 3. Proc. IT. S. Nat. Mus., Vol. V (March 21, 1883), p. 508. "Leaves ovate or lanceolate, pointed, wedge-shaped, or rounded at the base, petioled; margins set with coarse, appressed teeth; nervation strong*, crowded, regular; lateral nerves simple, parallel, terminating in the teeth of the margins." Collected by Dr. C. A. White. The most striking feature in these leaves is their strong, crowded, reg- ular nervation, from thirteen to nineteen nearly equidistant simple nerve branches issuing from either side of the midrib. The nervation is equally regular in P. longifolia, Lesq., Tert. Fl., p. 189, PI. XXVII, figs. 4-6; this volume, p. 81, PI. LVIII, fig. 3, but is lighter, and the marginal dentation is coarser, the teeth more obtuse. Fig. 4, on Lesquereux's plate cited above, resembles more the leaves before us and apparently belongs to a species distinct from the other two leaves with which it is there associated, possibly to this one. The leaves of P. longifolia are found in great abundance at Florissant, Colorado, and they are so much alike that there is no difficulty in separating them from other described species; while in the localities where the leaves of P. nervosa occur there are none which have the few long, horizontally cut teeth of P. longifolia, Hence while there is considerable resemblance in DESCRIPTIONS OF SPECIES. 83 the general aspect of these leaves, there can be little question that they are specifically distinct. Formation and locality: Tertiary (Green River group). Green River, Wyoming. Planera variabilis Newb. PI. LXVI, fig. 5-7. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 508. "Leaves lanceolate, to broad ovate; usually unsymnietrical, petioled; summit acute, sometimes long-pointed; base rounded or wedge-shaped; margins coarsely crenulate-dentate or serrate, with remote, appressed teeth; midrib straight, strong; lateral nerves delicate, frequently alter- nating stronger and finer, gently arched upward, terminating in the teeth of the border; the finer intermediate ones sometimes fading out before reaching the margin." Collected by Dr. C. A. White. Some of the various forms of leaves ascribed to Planera Ungeri fairly represent those before us, and their generic resemblance is apparent; but in our plant the leaf is more pointed, the serratures are coarser, generally more obtuse, and, when acute, more appressed. Planera longifolia Lesq., has larger, more symmetrical, and less acute leaves, with coarser triangular teeth. (See PI. LVIII, fig. 3.) From the other species described in this volume this may be distin- guished by its greater size, more ovate form, coarser serrations, and relatively smaller crenations. Planera emarginata Heer (Fl. Tert. Helv., Vol. II, p. 61, PI. LXXIX, fig. 24) has much more acute teeth and more bristling aspect. Several figures have been given of this species, in order to show the diversity of form it assumes, and it could be easily imagined that they were specifically different ; but coming as they do from one locality, and in the large collections made from this, we have an unbroken series, all per- vaded by a similarity of aspect, we must conclude that they are all from one kind of tree. Possibly future collections will prove that the narrower, more rigid form, with the deeply cut and acute serrations, and parallel, nearly straight lateral veins, shown in fig. 7, belongs to a different species; but in the very large number of Planera leaves before me it is impossible 84 THE LATER EXTINCT FLORAS OF NORTH AMERICA. to make any division without making several. They are, therefore, all grouped together for the present. Formation and locality: Tertiary (Green River group). Green River Station, Wyoming. Celtis parvifolia Newb. PI. LIII, fig. 6. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 510. "Leaves small; oblong-ovate in outline; rounded and unsymmetrical at the base, pointed at the summit; margins, except at the base, coarsely dentate; nervation sparse; two principal branches on each side of midrib, one pair springing from the base and throwing off branchlets, another strong pair issuing from the midrib at the middle of the leaf, other delicate branches given off near the summit." Collected by Dr. F. V. Hayden. In its general aspect, as well as its details of structure, this leaf very closely resembles C. Australis, differing from our living C. occidentalis, as well as from the fossil species that are found in the Tertiary beds of this country by its simpler nervation, its smaller size, and the relatively coarser serration of the margin. Formation and locality: Tertiary (Eocene?). Tongue River, Montana. Order MORACE^E. Ficus (?) Alaskana Newb. PI. LI, fig. 1 ; LII, fig. 1 ; LV, figs. 1, 2. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 512. "Leaves large, reaching 8 to 10 inches in length and breadth; trilobed, generally unsymmetrical; lobes pointed, usually obtuse; margins entire or locally undulate; nervation strong, conspicuously reticulate; principal nerves, three, giving off branches, which divide near the margins, some- times connecting in festoons, sometimes craspedodrome ; tertiary nervation forming a coarse network of usually oblong meshes filled with a fine polygonal reticulation; upper surface of the leaf smooth and polished, lower roughened by the reticulation of the nerves." Collected by Captain Howard, U. S. N. These beautiful leaves have been referred with much doubt to Ficus. They present considerable resemblance to some of the leaves of Ficus DESCRIPTIONS OF SPECIES. 85 tilicefolia Heer, particularly the lobed form shown in Fl. Tert. Helv., Vol. Ill, p. 183, PL CLII, fig. 14, and the nervation is sometimes similar, though generally less distinctly camptodrome. The differences, however, between our leaves and the usually simple unsymmetrical obliquely based leaves of T. tilicefolia show specific and perhaps generic distinctness. The localities which furnished the specimens now figured show by the great abundance of leaf impressions brought from there that they were at one time the home of rich and luxuriant vegetation, the slabs which carry these leaves being crowded with those of many different genera and species closely impacted together. Among these are the great oak leaves, 1 foot to 15 inches in length and 6 inches in width (Q. Gronlandica), Taxodium distichum miocenum, Juglans nigella, Prunus variabilis, large leaves of Platanus and Pterospermites, Corylus MacQuarrii, etc. This Ficus (?) seems to have been as abundant as any other, and collectors who shall visit the locality hereafter, by taking proper pains, will be able to find abundant and satisfactoiy representatives of all these and many other plants, and will undoubtedly obtain conclusive evidence of their botanical relations. Formation and locality: Tertiary (Miocene). Cook Inlet and Admi- ralty Inlet, Alaska. Ficus asarifolia minor Lesq. PI. LXVII, figs. 5, 6. Hayden's Ann. Rept., 1874 [1876], p. 303; Tert. Fl. (1878), p. 20s. Not F. asarifolia Ett., Fl. Bilin., p. 156, PI. XXV, figs. 2, 3, 6. Note. — These specimens uncpiestionably represent the variety of the species referred by Lesquereux to F. asarifolia Ett. in Hayden's Annual Report, 1874 [1876], p. 303; but this species has serrated margins, while in ours the margins are entire or slightly undulate. This distinction was recognized by Dr. Newberry in a memorandum on the plate, but he failed to state what name he intended to give to the American leaves. — A. H. Formation and locality: Cretaceous (Montana group). Point of Rocks, Wyoming. Ficus (?) Condoni Newb. PL LVI, fig. 1; LVII, fig. 1; LVIII, fig. 1. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 512. " Leaves large, sometimes nearly 2 feet in length, three to five-lobed, slightly decurrent, and the petiole sometimes stipulate; margins entire, or 86 THE LATER EXTINCT FLORAS OF NORTH AMERICA. gently undulate; nervation very strongly marked and closely reticulate, roughening the surface, camptodrome, but nerve branches sometimes terminating in the margins of the middle lobe." Collected by Rev. Thomas Condon, to whom the species is dedicated as a recognition of the important contribution he has made to paleontology in the discovery and exploitation of these interesting plant beds. The remains of this remarkable plant occur in great abundance in the Bridge Creek Tertiary beds, and it is represented in the collections made there by a large number of specimens. Some of these indicate leaves 18 inches to 2 feet in length and nearly as much in breadth. The most striking feature which they exhibit after their great size is the marked reticulation of the surface, which has given a peculiar lacelike roughening to the rock in the leaf impression. This character, as well as the general form and nerve structure, is fairly well given in the figures, and no one having seen them will have difficulty in recognizing the fossil. The reference to the genus Ficus wants the confirmation of the fruit before it can be accepted as established, but among all the leaves with which these have been compared there are none to which they bear so great resemblance as to those of the Moraceae, and especially with those of the leaves of Ficus and Artocarpus. The nervation is strikingly like that of a number of species of Ficus, such as F. scabriuscula, F. oppositifoli'a, F. Roxburghiana, F. sycomorus, and perhaps to none more than to that of the common fig, F. Carica. Hence, with regret in adding to the already large number of ill-defined fossil species of Ficus, it has seemed best to provisionally refer these leaves to that genus, giving them a place to which, without the evidence of the fruit, they are apparently as much entitled as any others. Sometime the fructification will be found, and then all doubt will be set at rest. There is good evidence that the genus Ficus was well represented in the luxuriant, warm temperate or subtropical flora which prevailed over so much of North America during the Tertiary age, .as it is now in the forests of tropical and subtropical America. At the same time it is necessary to say that of the large number of species of Ficus more than 20, which have been described as occurring in our Tertiary rocks, the identification has been in many instances based upon evidence that must be regarded as unsatisfactory. One of the most striking characters of these leaves is formed by the DESCRIPTIONS OF SPECIES. 87 reflexed stipule-like lobe at the base of the leaf. This is a feature that it has in common with some species of Platanus, especially Platanus basilobata Ward (Synopsis, Flora Laramie Group, 6th Ann. Rept, U. S. Geol. Surv. for 1884-85 [1886], Pis. XLII, XLIII), and something' of the kind is frequently found in strong growing shoots of the living Platanus occidentalis. As I have said in my description of Platanus nobilis, there are some char- acters in the leaves of that tree which raise the question whether it was a true Platanus, and yet my reference of it to that genus has been confirmed by Sir William Dawson and Dr. Lester F. Ward. The former has found leaves which he considers those of P. nobilis having this basilar lobe, and he has suggested that Dr. Ward's P. basilobata should be named P. nobilis var. basilobata. I should not be surprised if, in the light of more material, P. nobilis and the species now under consideration should be united in a new genus; but without additional material such a step would be hardly wise. Formation and locality : Tertiary (Miocene). Bridge Creek, Oregon. FlCUS MEMBRANACEA Newb PI. LIX, fig. 2. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 512. "Leaves sessile, 4 to 6 inches in length, by 2J to 3£ in width; ovate, abruptly and usually blunt-pointed, narrowed to the base, generally unsymmetrical, margin entire, nervation delicate, open, camptodrome; ten or more branches given off on either side of the midrib, curving upward, and forming a festoon near the margin." Of these leaves there are quite a number in the collection from Alaska, made by Captain Howard, and such as exhibit considerable diversity of form, as will be seen by the figures. That shown on PI. LIX is imper- fect and imperfectly represented; it is smaller than the average and more pointed, and the base should be prolonged and narrowed. The reference of these leaves to Ficus is provisional and can not be insisted upon. The nervation is that of this genus, and a considerable resemblance is shown to those described by Lesquereux (Tert, Fl., p. 194, PI. XXVIII, figs. 9-12) under the name of F. oblanceolata, but they are larger, broader in form, and the nervation is much more open. The texture of these leaves was evidently thin and membranous, a character plainly shown by 88 THE LATER EXTINCT FLORAS OF NORTH AMERICA. the contrast in appearance which they present to oaks, poplars, prunes, etc., with which they are associated; this is also indicated by the delicate, open, and flexuous nervation. Formation and locality: Tertiary (Miocene). Cook Inlet, Alaska. Ficus planicostata Lesq. 1 ? PI. XLVI, fig. 1. Hayden's Ann. Rept.,1872 [1873], p. 393; Tert. Fl. (1878), p. 201, PI. XXXI, figs. 1-8, 10-12. The leaf here figured is hardly sufficient for satisfactory determination ; it is imperfect at the summit and throughout part of the margin ; however, the insertion of the petiole and the nervation give it characters which are separated widely from any other leaves with which it is associated in the collection. The petiole is broad, and is inserted obliquely in the base of the leaf. The nervation is beautifully camptodrome, the branches of the basal pair of lateral nerves, as well as the summits of the lateral nerves above, forming a most beautiful and regular festoon. This is essentially the nervation of F. planicostata, and although the specimen is much smaller and narrower than the average of the leaves ascribed to that species, I have thought best to refer it doubtfully to this place until further material will permit the definitive settlement of the question. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Ficus reticulata (Lesq.) Hollick. PI. XII, figs. 2, 3. Laurophyllum reticulatum Lesq. Hayden's Ann. Rept. 1872 [1873], p. 425; Cret. Fl. (1874), p. 76, PI. XV, figs. 4, 5. Ficus laurophyllum Lesq. Hayden's Ann. Rept. 1874 [1876], p. 342, PI. V, fig. 7. Ficus laurophylla Lesq. Cret. and Tert. Fl. (1883), p. 49, PI. I, figs. 12, 13. Quite a number of specimens of these very distinctly marked leaves are contained in the collection received from Mr. Sternberg from Fort Harker, and still larger and finer ones since obtained through other channels show that the leaves sometimes attained a size considerably greater than that represented in fig. 2, but it was as wide and much longer. All these are alike in showing a smooth and polished surface, a thick, leathery texture, DESCRIPTIONS OF SPECIES. 89 a remarkably strong, straight, smooth midrib; pinnate, delicate, irregularly spaced, branched camptrodome lateral nerves. Except that they are more lanceolate and pointed, these leaves would hardly be distinguishable from those of Ficus elastica if fossilized. In form, exactness of outline, and strength of midrib, they resemble the leaves of Nerium, but the nervation is quite different. Formation and locality: Cretaceous (Dakota group). Fort Harker, Kansas, and Blackbird Hill, Nebraska. Protoficus in^qualis Newb. PL LVIII, fig. 2; LX, fig. 1. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 512. "Leaves 4 to 5 inches long, by 3 inches wide; oval, pointed at the summit, narrowed and rounded at the unsymmetrical base; margins entire or in part undulate; nervation strongly defined but open; about seven branches on each side of the midrib, the lower two or three giving off branches below, the upper simple, arched upward, terminating in the margin, the intervals between the branches spanned by numerous, generally simple tertiary nerves." Collected by Dr. F. V. Hayden. The general aspect of these beautiful leaves is not well given in the figure. They seem to have been thick and polished above, roughened below by the strongly marked nervation. They resemble in many respects the leaves of Protoficus, described by Count Saporta, from the travertines of Sezanne, as will be seen by comparing his figure of Protoficus crenulata (Fl. Foss. Sezanne, p 67, PI. VI, fig. 5). Our leaves differ from that, however, in this, that the base is unsymmetrical, the margin is entire or undulate, and the nervation is craspedodrome. This latter character is not common, but is not unprecedented among the figs, the leaves of several species of which bear considerable resemblance to these, e. g., F. sycomorus. It will also be noticed that the leaves under consideration are not unlike those described by Lestpiereux under the name of Ficus planicostata var. Goldiana (Tert. Fl., p. 202, PL XXXIII, figs. 1-3), but differ from them in the inequality of the base and the details of nervation. It seems highly probable, however, that they should form species of the same genus. Formation and locality: Tertiary (Eocene!). Tongue River, Montana. 90 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Order ARISTOLOCHIACE^E. Aristolochia cordifolia Newb. PI. XXXIX ; XL, fig. 7 ; LX, fig. 4. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 74; Ills. Cret. and Tert. PI. (1878), PL XXII, under Catalpa crassifoliaj XXV, fig. 7. Catalpa crassifolia, Newb. Op. cit. , p. 56. "Leaves large, fleshy, ovate, heart-shaped at base, pointed above, sometimes misymmetrical ; margins entire; nervation strongly developed; midrib straight or flexuous; lateral nerves about seven pairs; lower pair strongest, not reaching the middle of the leaf, giving off each about four branches on the lower side, of which the lower ones spring from the base of the laterals and are much branched; upper laterals branched at their summits, branches uniting to form a festoon somewhat remote from the margin; tertiary nervation invisible." Collected by Dr. F. V. Hayden. These leaves are referred in the Annual Report of the New York Lyceum of Natural History with hesitation to Catalpa, which they consid- erably resemble in form and nervation; but a large number of specimens submitted to inspection since the description was written exhibit characters which lead me to suspect that they represent a species of Aristolochia. This additional material shows the leaves to have been sometimes very large, more than 1 foot in diameter, broadly cordate in outline, often unsymmetrical. Fig. 4, given on PI. LX, exhibits the broader and more rounded form and the open festooned nervation; but this is scarcely more than one-third of the linear dimensions of the largest. The texture of the leaf seems to have been very thin, the nervation is sparse and open, though the principal nerves must have been somewhat fleshy. There are also associated with these leaves slender tortuous stems that seem to be portions of a vine. Taking these facts into consideration, I have been led to refer these leaves to Aristolochia and to compare them with the large, broadly cordate leaves of A. sipho. Future collections will undoubt- edly furnish material which will render it possible to speak with confidence in regard to the generic relations of the plant. Formation and locality: Tertiary (Eocene?). Banks of Amil Creek, Dakota. DESCRIPTIONS OF SPECIES. 91 Order NYMPHiEACE^. Cabomba (?) gracilis, Newb. PI. XXII, fig. 1 ; XXIII, fig. 1. Cabomba gracilis Newb. Proc. IT. S. Nat. Mus., Vol. V (March 21, 1883), p. 514. Ills. Cret. and Tert. PI. (1878), PL VII, fig. 1, under "aquatic rootlets of Equisetum"; VIII, fig. 2, under "Equisetum." "Stem slender, smooth; submerged leaves set at intervals of half an inch to an inch apart on the stem, opposite dichotomously and frequently branched, segments narrowly linear, or filiform, flattened, smooth, trun- cated, scarcely distinguishable from the stem and leaves of C. Caroliniana. 11 A large number of intertwining, smooth, narrow stems, with opposite, many-forked, linear leaves, are contained in some of the collections made from the Tertiary beds of the upper Missouri by Dr. F. V- Hayden. They were at first regarded as aquatic rootlets, but an examination of a multi- tude of well-preserved specimens shows that they are leaves and not roots, and comparing them with living plants they are found to imitate with a most perfect exactness the stems of leaves of Cabomba. The smaller speci- mens, like that figured, accurately represent the filiform variety of Cabomba Caroliniana of our Southern States. Mingled with these stems and leaves are obscure fragments of what may have been the peltate leaves, since some of them show a sort of umbilicus as though the point of attachment of the stem. Had there been but one or two of these specimens corre- sponding to the above description, their nature would have been left in so much doubt as to render it unwise to call attention to them; but occurring as they do in connection with other aquatic plants in very large numbers, and having a definite and invariable character, the stems smooth and lacking all the characteristics of creeping root stalks or aquatic roots, the leaves expanded, each pair in its own plane, and the pairs alternating, show that we have here to do with the stem and foliage of an aquatic plant of a marked and peculiar character. To this character no living plant seems to approach so nearly as Cabomba, and here the resemblance is so close that the probabilities become very strong that the reference to that genus will be confirmed hereafter by the discover)' of the floating leaves and flowers. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota 92 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Cabomba inermis (Newb.) Hollick. PL XXII. fig. 2; XXIII, fig. 2. Psilotum inerme, Newb. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 38; Ills. Cret. and Tert. PI. (1878), PI. VII, fig. 2, under "aquatic rootlets of Equisetum"; VIII, fig. 3, uuder Psilotum inerme. Associated with the last -described species are a large number of dichotomously forked, flattened leaves, which are imperfectly represented in the figure given. These have all the general character of the smaller ones, but are many times larger — 5 to 6 inches in length — so large, indeed, that it seems impossible that they should have appertained to the same species. A distinct and significant name has therefore been given to them. 1 These leaves are flattened and smooth, and have precisely the aspect of the broader leaves of the living Cabomba. Groups of these springing from a common base were formerly likened to Psilotum, and described in the Later Extinct Floras as P. inerme; but the study of additional material has led to the conviction that the probabilities are very much stronger that we have here a representation of a species of Cabomba. The isolated position of Cabomba in our modern flora is an indication that it is a relic of the past, and it was to be expected that in the sediments of the ancient fresh-water lakes of the far West, where the leaves of palms are preserved, affording evidence of a warm climate like that of our Southern States, traces of the former existence of Cabomba should be found. With some of the groups of leaves of the plant now under consideration are imperfect traces of fructification which in their general character confirm the reference to Cabomba, and yet are not sufficiently well preserved to thoroughly estab- lish the botanical affinities of these plants. It is to be hoped that attention being called to this peculiar group of fossils, they will be specially sought and found in the Fort Union beds in such condition as to establish beyond question their botanical affinities. In fig. 2, PL XXII, a pair of leaves is represented which are interme- diate in size between the two forms described, and these are erroneously shaded in such a way as to give the impression of rounded stems; in fact, these leaves are perfectly flat and correspond in form and structure to the 1 Dr. Newberry's manuscript name for this species is C. grandis, but under the accepted rules of nomenclature the original published specific name inerme must stand. — A. H. DESCRIPTIONS OF SPECIES. 93 others, but the plant was evidently somewhat decayed and mutilated before fossilization. Taking the series of figures now given and referred to Cabomba, they might be supposed to represent three species or different phases of one, but the very large number of the smallest form contained in the collection, and the close correspondence in size and form exhibited by them, seems clearly to justify the conclusion that they represent but a single species, while the larger form also generally exhibits the same characteristics. The interme- diate size represented in fig. 2, PL XXII, has few representatives in the collection, and hardly affords material for the creation of a distinct species. It has been thought better, therefore, to refer this to the larger one, to which it is most nearly allied in size. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. Brasenia (?) antiqua Newb. PI. LXVIII, fig. 7. Brasenia antiqua Newb. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 514 (not B. antiqua Daws., Trans. Roy. Soc. Canada, III, sec. 4, p. 15, 1885 [1886]). "Stems long, flexuous, cylindrical (now flattened), smooth, many times branched toward summit, bearing pedunculate spheroidal capitula consisting of numerous club-shaped pods." We have here the remains of an aquatic plant, having the general structure of Brasenia as regards stem and fruit, but the specimens are too imperfect to enable us to decide with confidence on its botanical relations. No leaves or flowers have yet been found, and the seeds are scarcely sufficient for its classification. Our common water shield, Brasenia peltata, is a very widely disseminated plant, as it is found on both sides of our continent and in Japan and the East Indies. This indicates that it has long been an inhabitant of the earth's surface, and whether the specimen before us can be accepted as evidence of its existence in North America during the Tertiary, the probabilities are strong that Brasenia was an inhabitant of the old lakes of the West and that its remains will be met with. Formation and locality: Tertiary (Green River group). Green River, Wyoming 94 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Order MAGNOLIACEiE. Magnolia alteenans Heerl PI. V, fig. 6. Nouv. Mem. Soc. Helv. Sci. Nat., Vol. XXII (1866), p. 20, PL III, figs. 2-4; IV, figs. 1, 2. Note. — So identified, provisionally, by Dr. Newberry, as indicated by memo- randum on margin of plate. Locality probably Blackbird Hill, Nebraska. — A. H. Magnolia elliptica Newb. n sp. PI. XII, fig. 1. Leaf 6 inches long by 3 1 inches broad, elliptical in outline, rounded at the base, acute at the summit; midrib strong and straight; lateral nerves numerous, strong, nearly simple, arched upward, parallel, inoscu- lating near margin (camptodrome). Collected by Dr. F. V. Hayden. Among described species, this approaches nearest to M. Hilgardiana Lesq. of the Tertiary of the Mississippi, but is shorter, broader, more rounded at the base, and more abruptly pointed at the summit. There is some doubt in regard to the age of the strata from which this plant was derived, and it is possible that it is tertiary and is but a phase # or varietv of the species with which it has been compared. Formation and locality: Tertiary (Eocene!). Tongue River, Montana. Magnolia obovata Newb. Ann. N. Y. Lye. Nat, Hist,, Vol. IX (April, 1868), p. 15. "Leaves large, obovate, entire, thick and smooth; pointed and slightly decurrent on the petiole; nervation strong; midrib straight and extending to the summit; lateral nerves pinnate, set at somewhat unequal distances, straight and parallel below, forked and inosculating above, forming a festoon parallel with the margin; tertiary nerves forming an irregular network of polygonal and relatively large areoles." Note. — As may be seen by comparing the descriptions, this species is mani- festly identical with the one described by Dr. Newberry under the name Nyssa retusta (see p. 125 of this monograph), and inasmuch as the latter name has priority DESCRIPTIONS OF SPECIES. 95 of place in the publication where they both originally appeared, the name Magnolia obovata becomes a nomen nudum. How this could have escaped Dr. Newberry's attention or the attention of subsequent workers and reviewers is strange. — A. H. Magnolia rotundifolia Newb. PL LIX, fig. 1. Proc. U. S. Nat. Mus., Vol. V (March 31, 1883), p. 513. "Leaves petioled, large (8 inches in length by 6 inches in width), round-ovate in outline, rounded or blunt-pointed above and slightly wedge- shaped below; margins entire; nervation open and delicate; four to six lateral branches given off from the midrib at remote and irregular dis- tances, curving gently upward, and forming festoons near the margin." Collected by Dr. F. V. Hayden. In general form this fine species would seem to be somewhat like M. regalis Heer (Fl. Foss. Arct, Vol. IV, Abth. I, p. 81, PI. XX; XXI, figs. 1, 2) and 31. Nordenskibldia Heer (op. cit., p. 82, PI. XXI, fig. 3; XXX, fig. 1), but with a much more slender and less crowded nervation than the first and a more rounded form than the second. A number of specimens in the collection show some diversity of form, and it is possible that the leaf figured is more rounded and less pointed than the average, but unless there should be very great departure from this standard there is little probability of this species being united with any other. The ner- vation is almost precisely that of the living M. acuminata, and there can not be any reasonable doubt that it is a representative of the same genus. Formation and locality: Cretaceous (Laramie group). Fischers Peak, Colorado. Lieiodendron Mkekii Heer. PL VI, figs. 5, 6. Proc. Phil. Acad. Nat. Sci. 1858, p. 265; Nouv. Mem. Soc. Helv. Sci. Nat., Vol. XXII (1866), p. 21, PI. IV, figs. 3, 4; Ills. Cret. and Tert. PI. (1878), PI. VI, figs. 5, 6 [fig. 6 under L. primcemi/rn]. Note. — So identified by Dr. Newberry, as indicated by memoranda on margin of plate and on specimen label. — A. H. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska 96 THE LATER EXTINCT FLORAS OF NORTH AMERICA. LlRIODENDRON PRIM^VUM Newb. PI. VI, fig. 7. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 12; Ills. Cret. and Tert. PI. (1878), PI. VI, fig. 7. [Not named on plate.] "Leaves three-lobed, upper lobe emarginate, all the lobes rounded; nervation delicate, principal nerve straight or slightly curved, terminating in the sinus of the superior lobe ; secondary nerves gently arching upward, simple or forked near the extremities, a few more delicate ones alternating with the stronger." Collected by Dr. F. V. Hayden. This leaf is considerably larger than that of L. Meekii Heer, less deeply lobed, and the lobes more broadly rounded. In its general aspect this species approaches much nearer the living tulip tree and the Tertiary species of Europe (L. Procaccinii Ung.) than that described by Professor Heer from the collections of Dr. Hayden (L. Meekii). The leaves of the former species are, however, generally more deeply lobed and the lobes are acute, but I have collected leaves of L. tuUpifera of small size with all the lobes rounded and in all respects remarkably like that under consideration. On the whole this is so like the leaf of our tulip tree that there can be little doubt that it represents a species of the same genus which grew on our continent at the commencement of the Cretaceous epoch. This is one of the most important facts deduced from the collections of Dr. Hayden, for the genus Liriodendron is now represented by but a single known species, which is confined to North America. Dming the Miocene Tertiary epoch, however, it formed part of the flora of Ihxrope, as well preserved leaves of a species very closely allied to, if not identical with, the living one grew in Italy, Switzerland, and Iceland. Thus this comes into the interesting category of Magnolia, Liquidam- bar, Sassafras, etc., genera which flourished both in Europe and America during the Miocene epoch, but which have long since ceased to exist on the European continent. These specimens also teach us the still more interesting truth that Liriodendron, Sassafras, Magnolia, Quercus, Salix, Platanus, Populus, and many others of our living genera date back on this continent to a period long anterior to the dawn of the Tertiary age, and having survived all the DESCRIPTIONS OF SPECIES. 97 changes of the incalculable interval now form the most conspicuous ele- ments in our existing forests. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Order BERBERIDACEiE. Berberis simplex Newb. PI. LVI, fig. 2. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 514. "Leaves pinnate, with three or more pairs of leaflets; leaflets ovoid, rounded or emarginate at base, acute, with two to four large spiny teeth on each side." Collected by Rev. Thomas Condon. This, so far as known, is the first example of the occurrence of a Berberis in the fossil state in America, and of this we have only a single specimen, though that is unmistakable in its character. It is evidently allied to B. aquifolium, which grows so abundantly in the region where the fossil was found, but differs from it in the small number and large size of the teeth on the margins of the leaflets in the fossil. It is true that occasionally the smaller variety of B. aquifolium (B. repens Land.) has leaflets very much like these, and I have before me as I write a specimen which I collected at Lake City, Colorado, in which some of the leaflets are almost precisely like these, differing from the fossil only in the less prolonged acute apex, and the narrower, somewhat wedge-shaped base. The surface of the fossil is quite smooth, showing almost nothing of the details of nervation; and this in a rock where the finer nerve markings are often most beautifully shown, as in the leaf represented on the same plate and which was obtained from the same beds. Hence we may conclude that in texture the leaf was thicker and its surface smoother than in B. aquifolium, in which the strong reticu- lated nervation is distinctly shown on both sides. In some specimens of B. Nepaulensis from the Himalayas we find a closer resemblance to the fossil plant than is offered by any of our native species, viz, sessile and slightly cordate leaflets with a simpler nervation, showing on the under side only the midrib and a basal pair of branches; teeth three to five on each side, the point produced as in the fossil. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. MON XXXV 7 98 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Order LAURACEiE. Sassafras cretaceum Newb. PI. VI, figs. 1-4 ; VII, figs. 1-3, VIII, figs. 1, 2. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 14; Ills. Cret. and Tert. PI. (1878), PI. VI, figs. 1-4. S. Mudgii Lesq. Am. Journ. Sci., Vol. XL VI (July, 18G8), p. 99 ; 8. Mudgei Lesq. Cret. Fl. (1874), p. 78, PI. XIV, figs. 3, 4 ; XXX, fig. 7. S. subintegrifolius Lesq. Am. Journ. Sci., Vol. XLVI (July, 1868), p. 99; S. (?) sub- integrifolium Lesq. Cret. Fl. (1874), p. 82, PI. Ill, fig. 3 (misquoted fig. 5.) S. Harkeriana Lesq. Hayden's Ann. Rept., 1872 [1873], p. 425; S. Harkerianum Lesq. Cret. Fl. (1874), p. 81, PI. XIII, figs. 3, 4; XXVII, fig. 2. S. obtusus Lesq. Hayden's Ann. Rept., 1871 [1872], p. 303; S. obtusum Lesq. Cret. Fl. (1874), p. 81, PI. XIII, figs. 2-4. Populites salisbur ice folia Lesq.? Am. Journ. Sci., Vol. XLVI (July, 1868), p. 94. S. (Araliopsis) cretaceum Newb. var. dentalum Lesq. Hayden's Ann. Rept., 1874 [1876], p. 344; S. cretaceum Newb. Lesq. in Cret. Fl. (1874), p. SO, PI. XI, figs. 1, 2. S. acutilobum Lesq. Cret, Fl. (1874), p. 79, PI. XIV, figs. 1, 2. S. {Araliopsis) cretaceum Newb. var. obtusum Lesq. Cret. Fl. (1874), p. 80, PI. XII, fig. 3 ; XIII, fig. 1. "Leaves petiolate, decurrent at base, very smooth above, strongly- nerved below; three-lobed ; lobes entire and acute. The nervation is all strongly defined; the central nerve straight or nearly so; the lateral primary nerve springing from it at an angle of 3U degrees; secondary nerves regularly arched till they approach the margin of the lobes, when they are abruptly curved and run together. From these the tertiary nerves are given off at a right angle, and from these the quaternary nerves spring at a similar angle, together forming a network of which the areoles are subquadrate." Collected by Dr. F. V. Hayden. It is perhaps not certain that the relationship between this beautiful fossil and the living Sassafras is as intimate as I have suggested, for Dr. Hayden obtained no fruits with the leaves, though from the abundance of the latter it is to be hoped that they may yet be found in the same locality. Until the fructification shall be procured, the suggestion that a species of our modern genus Sassafras flourished as far back as the epoch of the DESCRIPTIONS OF SPECIES. 99 deposition of the Middle Cretaceous strata, may be accepted with a certain degree of mental reservation. It is true, however, that there is a most marked correspondence, both in external form and nervation, between the living and the fossil plants, the differences being no greater than we might expect to find between species of the same genus. The nervation of the fossils is stronger and more regular, and the whole aspect of the leaf rather neater and more symmetrical. With the material already before us we may at least infer that there was living in the American forests of the Cretaceous period a Lauraceous tree, bearing trilobate leaves, having the general aspect and nervation of those of our Sassafras. The large collections made from the Dakota group at Fort Harker and elsewhere since the above note was written have included a great num- ber of trilobate leaves, which are not separable by any constant and well-marked character from those which formed the basis of the above description, viz, figs. 1 to 4, PI. VI. On these, however, Lesquereux has established a number of species of Sassafras, namely, S. acutilobum (the form figured on PI. VII, fig\ 1), 8. Harkerianmn (shown in our fig. 2, PI. VIII), 8. Mudgei, (PI. VII, fig. 2) 8. obtusum (PI. VIII, fig. 1), 8. subin- tegrifolius (PL VII, fig. 3), etc. A very large number of beautifully preserved specimens collected by Mr. Sternberg at Fort Harker, and which have been submitted to me for examination, show so many connecting links between these different forms that I am quite unable to separate them into distinct species. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska; Fort Harker and Smoky Hill Fork, Kansas. Sassafras cretaceum recurvatum (Lesq.) Newb. PI. IX, fig. 2. Sassafras recwvatus Lesq. Hayden's Ann. Rept., 1872 [1873] p. 424. Platanus recivrvata Lesq. Cret. Fl. (1874), p. 71, PI. X, figs. 3-5. Note.— Dr. Newberry considered this leaf to be a variety of his 8. cretaceum, as indicated by a memorandum on the margin of the plate. — A. H. Formation and locality: Cretaceous (Dakota group). Fort Harker, Kansas 100 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Cinnamomum Heerii Lesq. PL XVII, figs. 1-3. Am. Journ. Sci., Vol. XXVII (1859), p. 361 ; Trans. Am. Phil. Soc, Vol. XIII (1869), p. 431, PI. XXIII, fig. 12 ; Cret. Fl. (1874), p. 84, PI. XXVIII, fig. 11. Guided only by the brief description given by Lesquereux, I can not be positive that the species of Cinnamomum before us is identical with that procured by Dr. Evans from Vancouvers Island. In Lesquereux's speci- mens the summit of the leaf was wanting, but he conjectures that the lateral nerves extended to the point. Among my specimens are several in which the upper extremity of the leaf is preserved. From these it appears that the lateral nerves terminate in the margin before reaching the point. This would separate it from C. Buchi, and would bring it nearer to C. Scheuchseri or C. lanceolatum. My specimens, however, indicate a larger and thicker leaf than that of either of these species. It would be a matter of no little interest to determine the relations of the specimens of Cinnamomum contained in the Northwest Boundary Col- lection with those brought from Vancouver Island and Bellingham Bay by Dr. Evans, as that would probably permit us to decide whether the plant beds of Orcas Island should be grouped with those of the mainland or with those of Nanaimo. Formation and locality : Cretaceous (Puget Sound group). Orcas Island, Washington. Order HAMAMELIDACE^. LlQUIDAMBAR EUROPIUM Al. Br. PI. XL VII, figs. 1-3. In Buckl. Geol. and Mineral., p. 513 (1837). In the collection of fossil plants made by Rev. Thomas Condon at Bridge Creek, Oregon, occur a number of fragments of the leaves of a Liquidambar which I am unable to distinguish from some of the forms of the species known as L. Europceum Al. Br. The leaves are large, five to seven lobed, the lobes ovoid, long-pointed, and finely serrate. A frag- ment of a leaf apparently precisely like this is figured by Heer in his Flora of Alaska (Fl. Foss. Arct, Vol. II, Abth. II, p. 25, PI. II, fig. 7), and is referred by him to L. Europceum, The fruit associated with the leaves at Bridge Creek, as represented in fig. 3, is smaller than that of the living DESCRIPTIONS OF SPECIES. 101 Liquidambar of the Atlantic coast of North America, and the capsules are smaller. The leaves of Liquidambar are found generally distributed through the Middle Tertiary of Europe and have been described from many localities. They exhibit a great diversity in size and form, as is true of the living species above referred to, and it is the opinion of Heer and Schimper that this is the descendant of the fossil one. Lesquereux has described a species of Liquidambar from the Pliocene deposits of Chalk Bluff, California, which he regards as distinct from L. Europcewm. The largest specimen which he figures has almost exactly the form of those before us, but he says that they are usually small, and three-lobed. Probably this also is to be regarded as only a variety of L. Europmim, and all forms as hardly distinguishable from the living L. styraciflua. This species is quite variable. In northern Mexico the tree and leaves are small and the latter are all three-lobed. In Louisiana the Sweet Gum often forms the greater part of the forest growth ; the trunk attains the height of 60 to 80 feet, with a diameter of 2 to 3 feet. The tree grows along the coast as far north as Massachusetts, and has leaves 6 to 7 inches in diameter. They are generally five-lobed, but I have found on the same tree leaves that were three-, five-, and seven-lobed. Formation and locality : Tertiary (Miocene). Bridge Creek, Oregon. Liquidambar obtusilobatus (Heer) Hollick. PI. V, fig. 4; XII, fig. 4. Phyllites obtusilobatus Heer. Proc. Acad. Nat. Sci. Phila. (1858), p. 266. Acerites pristinus Newb. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 15. Liquidambar integrifolius Lesq. Am. Journ. Sci., Vol. XL VI (July, 1868), p. 93; Cret. Fl. (1874), p. 56, PI. II, figs. 1-3; XXIV, fig. 2; XXIX, fig. 8; Ills. Cret. and Tert. PI. (1878), PI. V, fig. 4, under Acerites pristinus. This is the leaf first described by Professor Heer, from an outline sketch, in the Proceedings of the Academy of Natural Sciences, Philadel- phia, 1858, page 266, under the name of Phyllites obtusilobatus. When, in 1868, the Later Extinct Floras of North America was published, an imperfect specimen was described by the writer as Acerites pristinus. Subsequently several much better specimens were obtained by Lesque- reux which led him to refer it to the genus Liquidambar. His descrip- tion is given in American Journal of Science, Vol. XLVI (July, 1868), 102 THE LATER EXTINCT FLORAS OF NORTH AMERICA. page 93, and in his Cretaceous Flora, page 56, where it is illustrated by numerous figures. Nearly all of these represent somewhat deeply five- lobed leaves, of which the lobes are pointed and sometimes acute. The figure given on PI. XII of this monograph shows that the lobes may some- times become broadly rounded. Since this note was written I have found in the Amboy Clays of New Jersey — a formation about on a level geologically with the Dakota group — leaves which I can not distinguish from those figured by Mr. Lesquereux. 1 All these five-lobed entire margined leaves contrast some- what strongly with those of the living species, and I am disposed to doubt the propriety of referring them to the same genus. The leaves of L. styraciflua are quite variable in size and form, but always have pointed lobes and serrated margins. In Northern Mexico all the "sweet gum" trees have three-lobed leaves, rarely more than 3 inches in diameter, while in New Jersey the leaves are from five to seven lobed and gen- erally from 5 to 6 inches in diameter. In the Puget Sound group a small three-lobed leaf occurs which could hardly be distinguished from these of the Mexican variety of the common species. These, like those of L. Europceus, as figured by Unger and Heer, can not be doubted to be Liquidambar, but the leaves now under consider- ation seem to me more likely to belong to the group of three- to five-lobed Aralias that are so common in the Dakota and Amboy groups. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska, and Fort Harker, Kansas. Order PLATANACEiE. Platanus aspera Newb. PI. XLII, figs. 1-3; XLIV, fig. 5; LIX, fig. 3. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 509. "Leaves attaining a diameter of 1 foot or more; petioled; rounded at the base, more or less three-lobed, sometimes nearly ovoid; nervation strong, about nine branches on each side of the midrib; margins deeply, and often compoundly toothed." Collected by Rev. Thomas Condon. 'Dr. Newberry probably has reference to Aralia rotundiloba Newb. Flora of the Amboy Clays, p. 118, PI. XXVIII. fig. 5; XXXVI, fig. 9 (Mon. U. S. Geol. Snrv., Vol. XXVI).— A. H. DESCRIPTIONS OF SPECIES. 103 We have here in the specimens which are figured and others similar, representatives of a fine species of Platanus which is apparently distinct from any hitherto described. In general form it most resembles P. Haydenii Newb., and may prove to be only a variety of this species; but the leaves of P. Haydenii obtained in Wyoming have only an undulate or bluntly toothed maro-in; it is well known, however, that this is a character which is exceed- ingly variable, and specific distinctions can hardly be based upon it. How- ever, the marginal teeth shown in figs. 1 and 2, the base and summit of the leaf, are so peculiar in then- size and their compound character that without connecting links we should not be justified in uniting these leaves with any others. In fig. 3 of the plate cited it will be noticed that the dentation at the base of the middle lobe is smaller and more like that in P. Haydenii, but the margins in this specimen are so incomplete that they afford information of but little value. Its chief importance is its demonstration of the large size and distinctly trilobate outline of some of the leaves of this tree. The leaf figured in PL XLIV, fig. 5, presents a marked difference of form from those represented on PI. XLII, but the character of the margins is the same, and it seems probable that this is only the ovoid form which the young and some of the mature leaves are prone to assume. Until further light shall be thrown on the subject it is safest to consider all the leaves mentioned in this note as belonging to the same species. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Platanus Haydenii Newb. PI. XXXVI; XXXVIII; LVI, fig. 3. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 18G8), p. 70; Ills. Cret. and Tert. PI. (1878), PI. XIX; XXI. "Leaves large, long-petioled, when mature three, perhaps rarely five lobed; lobes nearly equal, long-pointed, acute; on either side of the mid- dle lobe five to eight obtuse teeth; margins of the lateral lobes sinuately toothed to near the base ; younger leaves ovate, acuminate, coarsely toothed throughout, except near the base, which is slightly decurrent; nervation strong, radiate from the base, primary nerves three, which are nearly straight, and terminate in the three lobes of the border. From the midrib 104 THE LATER EXTINCT FLORAS OF NORTH AMERICA. spring seven or eight pairs of lateral nerves above the basilar pair; these diverge at an angle of about 35 degrees, are slightly flexed at the base, straight or nearly so above, where they are somewhat truncated, their branches terminating in the marginal teeth. The basilar nerves diverge from the midi'ib at an angle of about 35 degrees and run nearly straight to the extremities of the lateral lobes. They each give off on the lower side seven or eight branches, of which the second or third is strongest. These are more or less curved and branched, the branches terminating in the teeth of the margin. Fruit two to three lines long, prismatic, clavate." Collected by Dr. F. V. Hayden. This fine species, which is well represented in the collection, is closely related to Platanus aceroides, so common in the Miocene strata of Europe. There are, however, noticeable differences, which seem to me to have a specific value. The leaves of P aceroides, though exhibiting a great variety of form, are, I believe, always acutely toothed, while in the specimens before us the teeth are never acute, except those which in the young leaves represent the lateral lobes of the mature form. In P. aceroides also, accord- ing to Heer (Fl. Tert. Helv., Vol. II, p. 71, PI. LXXXVII and LXXXVIII, figs. 5-15), the nervation is more sparse, the angle of divergence of all the nerves greater, the number of lateral branches of the midi'ib less, and the number of marginal teeth considerably greater. Professor Heer says (loe. cit.) that in P. aceroides the middle lobe of the leaf has two to three denta- tions on either side, while in P. Haydenii the mature leaf has eight to ten teeth on each side of the middle lobe. The difference before specified in the form of the marginal teeth is very marked and strikes the eye at a glance. In P. aceroides they are few, long, and acute, sometimes even uncinate, while in P. Haydenii they are more numerous, less prominent, and always obtuse, sometimes merely giving a wavy outline to the margin of the leaf. Detached seeds are all that we have of the fruit, and these, though plainly derived from a Platanus, in their condition of fossilization afford no good characters with which to compare this species with the two now living on this continent, or with the living and fossil species of the Old World. P. aceroides, according to Heer, had fruit in racemes like the Mexican plane tree, while the fruit of P. occidentalis is single. In general aspect the species now before us is more like the eastern than the western of our DESCRIPTIONS OF SPECIES. 105 American sycamores, to the former of which it has considerable likeness and may very well have been its progenitor. The fine leaf figured on PI. XXXVIII, from La Bontes Creek, is probably a young or abnormal state of this species, as it occurs with the ordinary trilobate form. Formation and locality: Tertiary (Eocene ?). Banks of the Yellow- stone River, Montana. Platanus latiloba Newb. PL I, fig. 4. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 23; Ills. Cret. and Tert. PL (1878), PL II, fig. 4. Platanus obtusiloba Lesq. Am. Journ. ScL, Vol. XL VI (July, 1868), p. 97. Sassafras (Araliopsis) mirabile Lesq. ? Cret. Fl. (1874), p. 80, PL XII, fig. 1. "Leaves petiolate, three-lobed, decurrent at the base, lobes broad, obtuse, or abruptly acuminate; principal nerves three, secondary nerves issuing from these at an acute angle, tertiary nerves leaving the secondary at a right angle, forming a network over the surface of the leaf, of which the areolse are subquadrate." Collected by Dr. F. V. Hayden. Judging from the imperfect specimens which we have of this species, it is quite distinct from any described. Having the general form and nervation of the leaves of P. occidentalism the margins are much less deeply sinuate, the lobes less acuminate, and the entire outline of the leaf more simple. The same is true of its relations with P. orientalis of the Old World. The fossil species, of which several have been described by Unger and Groeppert, are quite distinct from this. The species described by Unger (P. Sirii and P. grandifolia) are much more deeply lobed, while that figured by Heer, Goeppert, and Ettingshausen (P. aceroides) is less deeply lobed, but more strongly toothed. All fossil species heretofore known are from the Tertiary strata, this being the first instance where the genus has been found in rocks of the Cretaceous epoch. A large number of nearly complete specimens of the leaf described above have recently been obtained from the Dakota sandstones near Fort Harker, Kansas. Some of these have come into the possession of Lesquereux, who has included them in the genus Sassafras, and has figured 106 THE LATER EXTINCT FLORAS OF NORTH AMERICA. and described some of them in his Cretaceous Flora under the name of Sassafras (Araliojasis) mirabile. Count Saporta has raised the question whether any of the trilobate leaves referred by Lesquereux and myself to Sassafras really belong to this genus, and has suggested that their affinities are more likely to be with Aralia. This question can only be definitely settled by the discovery of the fruits of the tree which bore these leaves; these will undoubtedly be found when they are carefully looked for by collectors. Waiting such time, however, we may say that some of the many trilobate leaves found in the Dakota group by their form and nervation are much more like the leaves of Sasafras than those of any other living genus. In these the form is ele- gantly trilobate, the margins entire, the lobes rounded or obtusely pointed; the nervation is camptochome. Possibly these leaves will be found to shade into those now under consideration, but judging from the material now before us the difference is considerable. For example, these leaves are larger, have a waved and sometimes even denticulate margin above, while the nerves are stronger and straighter, terminating in the denticles of the border. In all these respects they are more like the leaves of Platanus than those of Sassafras, and they are therefore for the present retained in the genus to which they were referred in the first published description. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Platanus nobilis Newb. PI. XXXIV; XXXVII, fig. 1; L, fig. 1. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 67; Ills. Cret. and Tert. PI. (1878), PI. XVII; XX, fig. 1, under P. Haydenii. " Leaves large, 1 J feet in length and breadth, petioled, three-lobed or subfive-lobed, lobes acute, margins of lobes and base entire, or near the summits of the lobes delicately sinuate-toothed; nervation strongly marked, generally parallel; medial nerve straight, two basilar nerves of nearly equal length and strength diverge from it at an angle of 30 to 35 degrees, are straight throughout, and terminate in the apices of the principal lateral lobes. Above the basilar nerves about 16 pairs of lateral nerves are given off from the midrib at about the same angle; these are nearly straight and parallel, terminating in the teeth of the margin. From DESCRIPTIONS OF SPECIES. 107 each of the basilar nerves diverge about the same number of pairs of branches as from the midrib, and these are also nearly straight and parallel, and terminate directly in the margin. Of these the second or third exterior one on each side is often much the stronger of the series, and is then prolonged into a small but distinct lateral, triangular, acute lobe, giving the leaf a somewhat pentagonal form. From this basilar branch of the lateral nerves, twelve or more short, generally simple, branchlets spring on the lower side, and four to five on the upper side near the summit, all of which terminate in the margins. The tertiary nerves connect the adjacent secondary nerves nearly at right angles; sometimes they are straight and parallel, but oftener more or less broken and branching where they meet, near the middle of the interspaces. Where the systems of nervation of the lateral and middle lobes come in contact, the tertiary nerves are stronger and form a somewhat irregular network, of which the areolae are large and subquadrate." Collected by Dr. F. V. Hayden. In o-eneral aspect these magnificent leaves are considerably unlike those of any known species of Platanus, and I have felt some hesitation in referring them to that genus. The texture was evidently thicker and the surfaces smoother than in the leaves of most Sycamores, and, on the whole, they recall the leaves of Cecropia or some other of the broad, leathery, polished leaves borne by the trees of the tropics. On close examination, however, they are found to present the radical structure of the leaves of Platanus, and, aside from their association with so many genera plainly belonging to the flora of the temperate zone, their form and nervation seem to me to afford at least presumptive evidence that they were borne by a tree of that genus. They will, perhaps, suggest to the fossil botanist the leaves described by Unger under the names of Platanus Hercules, P. Jatrophcefolia, etc. (Chlor. Prot., p. 137, PI. XLV, figs. 6, 7, etc), and which he subsequently removed from that genus. But those palmate, many-lobed leaves were very unlike these now before us, and resemble much more the leaves of Jatropha or Sterculia than those of Platanus. The crowded, somewhat heavy and regular nervation of these leaves, their thick texture and polished surface, must have given the tree on which they grew an aspect quite different from that of P. occidentals; but P. orientalis, and sometimes P. racemosa, have thick and polished leaves, 108 THE LATER EXTINCT FLORAS OF NORTH AMERICA. and the deviation from the common form is not so great in these fossils as in the living species I have named, or the fossil species named by Unger, P grandifolia and P. Sirii (Chlor. Prot, p. 136, PI. XLV, figs. 1-5, and Foss. Fl. Sotzka, p. 36 [166], PL XV [XXXVI]), fig. 1. In size these leaves exceed those of any known species of Sycamore, and if we are correct in referring them to Platanus, they may be considered the only relics we have of by far the noblest species of the genus. Some of the leaves are a foot and a half in length and of about equal breadth, and yet they do not so far exceed the ordinary size of the leaves of the Sycamores as do the leaves of Acer macropliyllum those of other species of maple. Since the above notes were written, Lesquereux has described (Tert. Fl., p. 237, PI. XXXIX, figs. 2-4) some trilobate, sometimes five-lobed leaves, which he compares with Platanus nobilis, and is inclined to regard them as identical; but it will only be necessary to refer to the figures now given, especially • that on Plate L, to show that the differences are such as to distinctly separate them. In Aralia notata Lesq., the general plan is not unlike that of the leaves in question (which is true also of most trilobate leaves), but here the resemblance ceases, for in A. notata the mar- gins are entire and the lateral nerves connect in festoons along the margin (camptodrome), whereas in P. nobilis the lateral branches terminate in the teeth with which the margins of the lobes are set (craspedodrome). In the Report of Progress of the Geological and Natural History Survey of Canada for 1879-80, Appendix N, Prof. J. W. Dawson gives notes on a number of species of plants collected on the Souris River, and among others he mentions Platanus nobilis, of which good specimens were procured by Dr. Selwyn and Dr. Gr. M. Dawson, and he confirms, by observations on these specimens, my reference to the genus Platanus. He alSo mentions a feature which does not appear in any of the specimens I have seen, namely, two short basal lobes extending backward on the petiole. This is not, however, unprecedented in the leaves of Platanus, as I have seen something of the kind in the large leaves borne by young and vigorous plants of P. occidentalis. The figure given on PL L is of the natural size, and attests the magnitude claimed for some of the leaves of this magnificent tree. When it is realized that the main nerves of the middle and lateral lobes must unite at a point some inches below the part DESCRIPTIONS OF SPECIES. 109 represented at the bottom of the figure, and that the central lobe was at least 6 inches and the lateral lobes 3 or 4 inches larger than represented, it will be seen that the leaf could not have been much less than a foot and a half in length and breadth. These dimensions are rivaled by no living species of Platanus, but I have fragments of the leaves of P. Baynoldsii which could have been little less in size. The leaf figured on PL XXXVII, fig. 1, is an immature form of this species. This is established by its occurrence with the larger and more deeply lobed leaves, with which it is connected by intermediate forms. Formation and locality: Tertiary (Eocene ?). Near Fort Clark, Dakota. Platanus Raynoldsii Newb. PL XXXV. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 18(38), p. 69; Ills. Cret. and Tert. PI. (1878), PI. XVIII. "Leaves of large size, sub-orbicular or rudely triangular in outline, more or less rounded below, three-pointed above, often decurrent on to the petiole, margins at base entire, on the sides and above, coarsely and obtusely double-serrate, the lobes of the upper margin short and broad, less produced than in most other species; nervation strong but open, having the general character of P. occidentalis and of the fossil species P. aceroides." Collected by Dr. F. V. Hayden. The younger leaves are rounded in outline and decurrent on the petiole. Those more fully developed (which are sometimes 15 inches in length and breadth) , more triangular in form, not always decurrent, and having lobes more produced, offer considerable resemblance to those of P. aceroides, an extinct species from the Miocene of Europe, the nervation being similar in kind and not greatly different in degree. The leaf is, however, always less angular than in P. aceroides and P. Haydenii, and the character of the mar- ginal serration is essentially different from that of any known species. In P. aceroides the margins are set with long, acute, curved, simple teeth, as in the living P. occidentalis; in P. Haydenii the margins are for the most part only sinuate; and in P. nobilis the middle lobes only are toothed, and those but slightly ; while in the species before us, with the exception of the basal margin, the whole outline is marked by a broad, strong, double dentation. 110 THE LATER EXTINCT FLORAS OF NORTH AMERICA. The figure given on PL XXXV is that of a complete leaf about half the size, linear, of the largest contained in the collection. In texture the leaf was apparently similar to that of P. occidentalism rather thin and more or less roughened. Formation and locality: Tertiary (Eocene?). Banks of Yellowstone River, Montana. Order ROSACEA. Pyrus cretacea Newb. PI. I, fig. 7. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 12; Ills. Cret. and Tert. PL (1878), PL II, fig. 7. "Leaves petioled, small, roundish-oval or elliptical, often slightly emarginate, entire or finely serrate; medial nerve strong below, rapidly dimiuishing toward the summit; lateral nerves four or five pairs with intermediate smaller ones, diverging from the midrib at unequal angles, curved toward the summits, where they anastomose in a series of arches parallel with the margin; tertiary nerves forming a network of which the areolae are somewhat elongated." Collected by Dr. F. V. Hayden. There are a number of leaves in the collection, of which the characters, as far as they are discernible, agree more closely with those of the species of Pyrus than with any other with which I have compared them. All the traces of then original structure which remain, however, are quite insufficient to permit their generic limitation to be determined with any degree of cer- tainty. The leaves of many of the allied genera of the Rosacese have so much in common that even with the leaves of the living plants it would be difficult, if not impossible, to separate them. The fossils before us are, however, very characteristic of the formation which contains them, and for that reason require notice, and, as far as practicable, description. There are several other leaves in the collection which seem to me to have belonged to Rosaceous trees, and there is perhaps no a priori improba- bility that Pp-us began its existence on this continent with its congeners and companions in our forests of the present day. Formation and locality: Cretaceous (Dakota group). Smoky Hill, Kansas. DESCRIPTIONS OF SPECIES. Ill Amelauchier similis Newb. PL XL, fig. 6. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 48; Ills. Cret. and Tert. PL (1878), PL XXV, fig. 6. "Leaves petioled, ovate, obtuse or acuminate, rounded or slightly cordate at the base; margin coarsely toothed, except near the petiole, where it is entire; nervation pinnate, delicate; medial nerve straight, six to seven pairs of lateral nerves diverging from the midrib at an angle of about 40 degrees, slightly curved upward, especially near the summit, the upper ones nearly simple, but giving off a perceptible branch near the summit on the lower side, which runs into the next tooth below. The lower pair spring from the extreme base of the leaf, are strong and simple, and strike the margin where the dentation commences. The second pair of lateral nerves each send off two or three slender nerves from near the summit to the teeth of the adjacent margin; tertiary nerves very fine, leaving the secondaries at right angles, and forming a fine network of which the areolse are nearly quadrate." Collected by Dr. F. V. Hayden. The number of specimens of this species in the collection is small and all but one are imperfect. This one is the impression of a thin, delicate leaf, of which all the details of nervation are preserved as perfectly as they could have appeared in the living plant. The other specimens indicate that the leaves were usually pointed, often acute. From the nervation and character of dentation of these leaves, I think we may at least say that the plant which bore them was Rosaceous, and among the Rosaceous genera with which I have compared them they approach most nearly to Amelanchier, some of the leaves of A. Canadensis being entirely undistinguishable from them in form or nervation. A. Canadensis now grows over all the temperate parts of the continent and would seem from its wide range to be an old resident of the conti- nent and as likely to be represented in the Tertiary as any other of our plants. Formation and locality: Tertiary (Eocene!). Banks of Yellowstone River, Montana. 112 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Crataegus flavescens Newb. PL XL VIII, fig. 1. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 507. "Leaves small, about 1 inch in length and breadth; lobed; lobes rounded and bearing a few teeth or crenulations ; the summit of the leaf trilobed, with two lateral lobes below on either side." Several small, lobed leaves are contained in the collection made by- Rev. Thomas Condon, which bear such resemblance to those of some species of Crataegus that we seem to be justified in referring them to this genus. Of these the one figured is the most complete in outline; this in its general proportions and markings approaches closely to the leaves of C. flava Ait., but in that species the leaves are usually somewhat larger and the lobes are set with several acute teeth. Eighteen fossil species of Crataegus have been described, and of these three from the Tertiary deposits of North America, namely, C. antiqua Heer (Fl. Foss. Arct, Vol. I, p. 125, PI. L, figs. 1, 2), C. Warthana Heer, and C. cequidentata Lesq. (Tert. FL, p. 297, PI. LVIII, figs. 4, 4a); but these are much larger and have rhomboidal and undivided leaves ; indeed, it is not certain that they all belong to the genus Crataegus. Of foreign species there is none with which this is likely to be con- founded. C. dyssenterica Mass. (Fl. Foss. Senigall, p. 414, PL XIX, fig. 1), is similarly lobed, but the leaves are larger and much more deeply cut. The resemblance of the leaves before us to those of the living C. flava is so close that it is quite possible that the present is the derivative from the ancient species, a possibility suggested in the specific name chosen. Formation and locality : Tertiary (Miocene). Bridge Creek, Oregon. Prunus variabilis Newb. PI. LII, figs. 3 and 4 (in part), 5. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 509. " Leaves short-petioled, very variable in form; lanceolate or broadly lance-ovate, 2 to 3 inches long by 1 to 2 inches wide; acuminate at the summit, wedge-shaped at base; margins thickly set with minute, acute, appressed teeth." Numerous leaves, which evidently belong to the genus Prunus, occur DESCRIPTIONS OF SPECIES. 113 in the collections from Alaska made by Captain Howard, and sometimes several on the same slab that exhibit no differences except the marked variation in form shown in the figures and alluded to in the name given. Compared with the living species, these leaves have much the aspect of some of the forms of P. Virginiana, the marginal serration being very much the same, though the leaves of the living plant are usually obovate. A species of Prunus is described by Professor Heer from the Tertiary strata of Greenland under the name of P. Scottii (Fl. Foss. Arct, Vol. I, p. 126, PI. VIII, fig. 7), but the only leaves he describes and figures are much larger and longer and more coarsely toothed than these. Numerous species of Prunus have been described from the Tertiary of the Old World, but so far as we can judge there are none that have the somewhat peculiar lanceolate leaf, broader in the middle than elsewhere and narrowed at both ends, terminating in a long point, like the one under consideration. It has been thought necessary, therefore, to distinguish this by a special specific name. Formation and locality: Tertiary (Miocene). Cook Inlet, Alaska. Order LEGUMINOS^E. Cassia sp.f Newb. PI. XLVI, fig. 10. Note. — The only information which I have been able to obtain in regard to this figure is the manuscript note, "Cassia fruit," by Dr. Newberry, on the margin of the plate, and the locality given on the specimen label. — A. H. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Leguminosites Marcouanus Heer. PL V, fig. 3. Proc. Acad. Nat. Sci. Phila. (1858), p. 265; Ills. Cret. and Tert. PL (1878), PL V, fig. 3, under Phyllites obcorclatus. The original tracing of this leaf, on which Professor Heer has writ- ten the name given it, enables me to identify it with certainty and to correct an error which has been committed in reference to it, namely, that MON XXXV 8 114 THE LATER EXTINCT FLORAS OF NORTH AMERICA. its name has been given to another larger, broader, obovate leaf found with it, and described by Professor Heer with the name of Phyllites obcordatus. The areneral form of these leaves is not unlike, but the one now imder consideration is narrower, slightly unequal at the base, and has a remarkably sparse nervation, as will be seen by referring to the figures. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Order ANACARDIACEjE Rhus (?) nervosa Newb. PL XXXIII, figs. 5, 6. Rhus nervosa Newb. Ami. N. Y. Lye. Nat, Hist., Vol. IX (April, 1868), p. 53; Ills. Cret. and Tert. PI. (1878), PI. XVI, figs. 5, 6. "Leaves pinnate, leaflets oblong or linear in outline, rounded or cordate at the base, pointed above; margins coarsely and acutely serrate; nervation pinnate, strong; lateral nerves numerous, leaving the midrib at an acute angle, simple or somewhat branched, parallel, gently arched upward, and terminating in the teeth of the border." Collected by Dr. F. V. Hayden. The specimens of this plant scarcely afford material for satisfactory classification. They bear a strong resemblance to the pinuate leaflets of some of our shrubby species of Rhus, especially of B. copaMina and B. typhina. The nervation and marginal serration are essentially the same, and the texture of the leaf would appear to have been similar, but the nerves are stronger and the dentation coarser than in most specimens of these species with which I have compared it, With the trifoliate and oak-leaved species it has little in common, and will not be likely to be confounded with any of the fossil species which have been described. The general form of the leaf is not unlike B. Meriani Heer (Fl. Tert. Helv., Vol. Ill, PI. CXXVI, figs. 5-11), but the margins of the leaves of that species are not as deeply toothed. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. DESCRIPTIONS OF SPECIES. 115 Order ACERACEiE. Acer sp.1 Newb. PL XLVI, fig. 8. Note.— The only information which I have been able to obtain in regard to this figure is the manuscript note, "Acer fruit," by Dr. Newberry, on the margin of the plate, and the locality as given on the specimen label. — A. H. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Negundo triloba Newb. Pi. XXXI, fig. 5. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1808), p. 57; Ills. Cret. and Tert. PI. (1878), PL XXIII, fig. 5. "Leaves thin and delicate, but distinctly nerved, pinnate in one or more pairs, leaflets lanceolate or lance-ovate, long-pointed, rounded or slightly cordate at base, sliort-petioled ; margins coarsely, remotely, and irregularly toothed; terminal leaflet trilobate, the margins toothed or ser- rated; nervation of lateral leaflets pinnate, nine or ten pairs of lateral nerves diverging from the midrib at an angle of about 50 degrees, arching upward, more or less branched toward the summit. Of these the basal pair are shortest and simple, following the course of the adjacent margin; the second pair are strongest, and throw off each three or four curved branches on the lower side." Collected by Dr. F. V. Hayden. The general aspect, including texture, form, dentation, and nervation of the lateral leaflets is strikingly like that of the corresponding parts of the leaf of the living Negundo aceroides. The genus Negundo is represented among living plants by but a single species, and this is so like Acer in all but its leaves that Professor Gray intimates that it should hardly be con- sidered distinct from that genus. A fossil species has been discovered in the Tertiaries of Europe, N. Ewopceum Heer (Fl. Tert, Helv., Vol. Ill, p. 60, PI. CX VIII, figs. 20-22), but it would seem to have been a smaller species than the living one, and had obovate wedge-based leaves quite different from those before us. If, in the light of more and better material, it should prove that a species of Negundo lived on the American continent during the Tertiary 116 THE LATER EXTINCT FLORAS OF NORTH AMERICA. age, it would be a fact of no little interest, and would strengthen the claims of N eg undo aceroides to a distinct generic place in the botanical series. In that case, however, its trilobate terminal leaflet would still further indicate its acerine affinities. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. Order SAPINDACE^E. Sapindus affinis Newb. PL XXX, fig. 1; XL, fig. 2. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 51 ; Ills. Cret. and Tert. PL (1878), PL XXIV, fig. 1 ; XXV, fig. 2. "Leaves pinnate in many pairs of leaflets, with a single lanceolate terminal one; leaflets smooth, thick, lanceolate, long-pointed, acute, sessile or short-petioled, unsymmetrical, rounded or wedge-shaped at base; nerves fine and obscure, ten or more branches diverging from the midrib on either side at somewhat unequal distances, and of unequal size. These arch upward, giving off several lateral branches at right angles, or nearly so, and die out near the margins, or are carried around in a curve parallel with it, and thus connect." Collected by Dr. F. V. Hayden. These leaves are most strikingly like those of Sapindus, and taken by themselves would afford perhaps sufficient ground for uniting them with that genus. They are also very like a series of leaves found in the Tertiaries of Europe, figured by Professor Heer, in Fl. Tert. Helv., Vol. Ill, p. 61, Pis. CXIX, CXX, CXXI, under the names of Sapindus falci- folius, S. densifolius, and S. dubius. The nervation is also the same; so there can hardly be a doubt that our plant and those of Professor Heer are generically identical, and, if the proofs before him of the identity of his fossils with the living genus Sapindus are sufficient, we must conclude that the specimens before us are also the representatives of that genus. In our specimens, however, the leaves are constantly shorter and broader than in the species I have mentioned, and are often rounded at the base, so that I have been compelled to regard them as specifically distinct. Formation and locality: Tertiary (Eocene?). Mouth of Yellowstone River, Montana. DESCRIPTIONS OF SPECIES. 117 SAPINDUS (?) MEMBRANACEUS Newb. PI. XXX, figs. 2, 3. Sapindus membranaceus Newb. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 52 ; Ills. Cret. and Tert. PI. (1878), PI. XXIV, figs. 2, 3. "Leaves pinnate in many pairs of leaflets, and terminating' in a large ovate, often unsymmetrical one; lateral leaflets lanceolate, acute, wedge- shaped at base, unsymmetrical, thin and membranous, with entire margins; nervation fine and sparse, many pairs of lateral nerves being- given off by the midrib (from which also spring many small lateral branchlets), and these arching upward inosculate near the margin or die out." Collected by Dr. F. V. Hayden. This is similar in nervation and in the general form of the lateral leaflets to the preceding species (8. affinis), but the whole plant is more delicate, the leaf thinner, the nervation finer, the terminal leaflet several times as large and of a different form. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. Order RHAMNACE^. Rhamnus elegans Newb. PI. L, fig. 2. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 49. "Leaves lanceolate, entire, rounded or abruptly narrowed at the base, long-pointed and acute above, broadest part one-third the distance from the base to apex; nervation regular and sharp, but delicate; midrib strongly marked, lateral nerves twelve to fifteen, nearly equidistant on either side, gently arched upward, and terminating in the margins; tertiary nerves numerous, fine, spanning the distance between the branch nerves, and dividing this space into narrow, sub-rectangular areoles." Collected by Miss Kate Havmaker. This is a remarkably neat and symmetrical leaf, both as regards its outline and nervation. Its lines are all graceful, with little of the rigidity that characterizes the leaves of most of the Rhamnaceae, and more of the aspect of the leaf of a Lauraceous tree; but the numerous parallel side- 118 THE LATER EXTINCT FLORAS OF NORTH AMERICA. nerves, terminating all in the margins, form a character which the Laurels never have. Of described species it most resembles Weber's R. Decheni (Palasontogr. Vol. II, p. 204 [90], PI. XXIII [VI], fig. 2), but differs from it in having an ovate, lanceolate form, and the nervation is a little more crowded. Formation and locality : Cretaceous (Laramie group). Belmont, Colorado. Rhamnus Eridani Ung. PL XLVIII, fig. ? Gen. et Sp., PI. Foss. (1850), p. 465. The leaf represented in fig. 7 is unique in the collection made at Bridge Creek, Oregon, but though imperfect it is very distinctly marked, and apparently belongs to the genus Rhamnus, and so closely resembles some of the figures of Rhamnus Eridani Ung., especially that described in Fl. Foss. Arct, Vol. I, p. 123, PI. XLIX, fig. 10, that I have not felt justified in regarding them as distinct. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Rhamnites concinnus Newb. PI. XXXIII, figs. 7 (8?). 1 Ann. N. Y. Nat. Hist., Vol. IX (April, 1868), p. 50; Ills. Cret. and Tert. PI. (1878), PI. XVI, figs. 7, 9 (fig. 9 under Viburnum asperum). "Leaves petioled, long ovate, acute, rounded at the base, coarsely and nearly equally mucronate-dentate ; nervation pinnate, remarkably precise and parallel throughout; medial nerve straight; lateral nerves, nine to ten pairs, diverging at an angle of about 20 degrees, slightly arched upward, parallel among themselves, basilar pair reaching to margin below the mid- dle of the leaf, sending off each about eight short, simple, slightly curved, parallel branches to the dentations of the baso-lateral margin; superior lateral nerves simple, or once-forked at the summit; tertiary nerves very numerous, simple, parallel, connecting the lateral secondary nerves and the branches of the basilar nerves nearly at right angles." Collected by Dr. F. V. Hayden. 1 The description applies without doubt to fig. 7, but does not agree with fig. 8. This latter specimen, however, is plainly labeled in Dr. Newberry's handwriting as belonging to this species, although it would appear to be more logical if allied with fig. 9, same plate ( Viburnum asperum Newb.)— .A. H. DESCRIPTIONS OF SPECIES. 119 These beautiful leaves are so definite in form and structure and so perfectly preserved that we should have no difficulty in referring them to their appropriate genus if we could find among living trees their precise generic counterpart, but up to the present time I have not been able to satisfy myself that they are generically related to any living plants. The nervation is in some respects very like that of Berchemia, e. g., B. volubilis, the "Supple Jack" of our Southern States. Nowhere else do I remember to have seen the same parallelism of the secondary and Tertiary nerves, but the serration of the margin is coarser than in any of the Rhanmacese with which I am acquainted, and the development of the basilar pair of lateral nerves is much greater than in Berchemia. This latter character is not without example in Rhamnus, as it is even more conspicuous in some species of the genus, as, for example, in B. celtifolia of the Cape of Good Hope. A cross between that species and our Berchemia, with a greater develop- ment of the marginal dentation than either exhibits, would give us the fossil before us. Considering it to exhibit more of the character of the Rhamnacese than of any other family, I have placed it doubtfully there. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. ZlZYPHUS ],ONGIFOLIA Newb. PI. LXV, figs. 3-5. Proc. IT. S. Nat. Mug., Vol. V (March 21, 1883), p. 513. "Leaves 4 to 7 inches long by 6 to 12 lines wide; lanceolate, long- pointed, wedge-shaped at base, and long petioled; margins waved, or more or less distinctly toothed; midrib well defined from base to summit; basal pair of lateral nerves approaching closely to the margin near the middle of the leaf, then curving gently inward and anastomosing with the higher lateral nerves, of which there are three or more set alternately and curving upward, forming a festoon near the margin ; tertiary nerves very finely reticulated." Of this species a large number of specimens occur in the Green River Shales in certain layers where they are associated with the ferns Lygodium and Acrostichum They may be at once distinguished from those of any other described species of Zizyphus by their elongated and lanceolate form. In the same slabs which contain these leaves are a few which, though -o' 120 THE LATER EXTINCT FLORAS OF NORTH AMERICA. imperfect, apparently represent Lesquereux's Z. cinnamomoides. These are ovate or ovate-lanceolate in outline, and yet may be only a variety of the species described above. They differ, however, widely from the descrip- tion of Z. cinncmomoides of Lesquereux. Formation and locality : Tertiary (Green River group). Green River, Wyoming. Order VITACEjE. VlTIS ROTUNDIFOLIA Newb. PL LI, fig. 2, in part ; LIII, fig. 3. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 513. "Leaf broadly rounded or sub-triangular in outline, cordate at the base, and with an acute point at the summit, and at the extremity of each of the angles; intermediate portions of the margin coarsely and bluntly toothed; strongly three-nerved; tertiary nervation distinct and flexuous." Collected by Captain Howard. The general aspect of this leaf is but imperfectly given in the di'awings, inasmuch as the strength of the nervation has been somewhat exaggerated, but the leaf was apparently thicker and with stronger nerva- tion than in most of the vines. Among living species it bears the strongest resemblance to V. labrusca, but is less distinctly angled and more strongly dentate on the margin. Professor Heer has described three species of Vitis that occur in the arctic regions, V. Olriki (Fl. Foss. Arct, Vol. I, p. 120, PI. XLVIII, fig 1), V. arctica (op. cit., PI. XLVIII, fig. 2), and V. Islandica (op. cit., p. 150, PI. XXVI, figs, le, If, 7a), but all these had leaves which were more elongated triangles in form and of lighter structure. Formation and locality: Tertiary (Miocene). Admiralty Inlet, Alaska. Order TILIACE^E. Grewia crenata (Ung.) Heer. PL XLVI, fig. 2; XLVIII, figs. 2, 3. Fl. Tert. Helv., Vol. Ill (1859), p. 42, PL CIX, figs. 12-21; CX, figs. 1-11. Dombeyopsis crenata Xing., Gen. et Sp. PL Foss, (1850), p. 448. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon, DESCRIPTIONS OF SPECIES. 121 Order ARALIACEiE. Akalia macrophylla Newb. PI. LXVII, fig. 1; LXVIII, fig. 1. Proc. IT. S. Nat. Mus., Vol. V (March 21, 1883), p. 513. "Leaves large, long-petioled, palmately five-parted from the middle upward, divisions conical in outline, sometimes entire, often remotely, occa- sionally coarsely toothed; nervation strong and regular; the midribs of the divisions strong and straight, those from the second lateral lobes springing from near the bases of the first lateral lobes; secondary nerves numerous, distinct, curved gently upward; where the margins are entire, partially camptodrome; where dentate, terminating in the teeth; tertiary nerves anastomosing to form quadrangular and very numerous areoles." Collected by Dr. C. A. White. In general form and nervation these leaves are very similar to the typical fossil species of the genus, viz: A. Whitneyi Lesq., A. angostiloba Lesq., of the Pliocene of California, and A. Hercules (Ung.) Sap. (Ann. Sci. Nat. Bot., 5 me Ser., Vol. IV, p. 295 [151], PI. IX, fig. 2), of the Miocene of Radoboj, Croatia (Platanus Hercules Ung., Chlor. Prot., p. 138, PI. XLVI), and especially A. Saportanea Lesq. of the Dakota Cretaceous. From all these, however, it differs specifically in several characters. Unger's species agrees in having the midribs of the lobes radiating from the base, while in the species described by Lesquereux, enumerated above, the lower pair spring from the first laterals some distance above their bases, as though the primary form was a tripartite leaf, the lateral lobes contracted where they join, thus acquiring a spatulate outline; and his A. grandifolia has more coarsely toothed, A. Jatroplmfolia, seven-parted leaves. In the localities where they are found the leaves of A. macrophylla are exceedingly abun- dant, sometimes matted together so as to obscure their outlines. These show that they vary in size, in the number of lobes, and in the character of the margins, occasionally one occurring which is only three-lobed, while almost all are five, and the margins are sometimes nearly entire, while in other leaves they are all strongly, even spinously dentate. The leaves vary from 3 to 12 inches in length, and the lobes are sometimes long and narrow, 122 THE LATER EXTINCT FLORAS OF NORTH AMERICA. in others much broader. This variability indicates that the leaves having narrow entire lobes found in the Dakota group and named A. quinquepartita, A. tripartita, and A. cuneata, by Mr. Lesquereux, are but forms of one species. Aralia Whitneiji Lesq. has seven-parted leaves, these less deeply lobed, and with entire margins; A. angustiloba more deeply cut leaves with narrower and entire lobes (Mem. Mus. Comp. Zool., Vol. VI, No. 2 (1878), p. 22, PI. V, figs. 4, 5). Perhaps of all described species of Aralias A. Saportanea Lesq., from the Dakota group of Kansas (U. S. Geol. and Geog. Surv. of Colorado, Hayden (1874), p. 350, PI. I), approaches nearest to those under considera- tion, but are distinguished by minor characters, smaller size, less deeply dentate margins, etc. This species is found, however, in our Middle Cretaceous strata, forming part of the most ancient angiosperm flora, and while the species are unquestionably distinct, their great resemblance may be fairly taken as an indication that one is the progenitor of the other. The group of leaves now before us has been, perhaps without sufficient proof, referred to the genus Aralia, and it is highly desirable that this question should be decided by the discovery of fruit or flowers. But whether Aralia or not, they constitute a marked feature in the older angiosperm floras in this country and in Europe, and their geological interest and value is to a certain degree independent of their botanical relations. It has been suggested by Count Saporta that not only the trilobed leaves from the Dakota Cretaceous, which I have described as Sassafras, but also the great leaves of Platanus nobilis, figured in this volume, should be referred to Aralia, as the platanoid leaves described by Unger as P. Hercules, etc., have been; but there is little resemblance between the quinquepartite, narrow-lobed, toothed leaves of A. Saportanea Lesq. and its associates with three lobes, broadly rounded, sometimes almost obsolete and entire, in Sassafras cretaceum, and it only requires a glance at the figure of the huge leaf of Platanus nobilis, given on PI. L of this monograph, to be satisfied that its affinities are with Platanus rather than Aralia. Formation and locality: Tertiary (Green River group). Green River, Wyoming. DESCRIPTIONS OF SPECIES. 123 Aralia (!) quinquepartita Lesq. PI. IX, fig. 1. Hayden's Ann. Rept., 1871 [1872], p. 302; Cret. Fl. (1874), p. 90, PI. XV, fig. 6. The possession of a better specimen than that on which Lesquereux based the description of the species, one, in fact, that is nearly entire, prompts the publication of the figure now given. Since the appearance of the Cretaceous Flora, Lesquereux has figured and described a number of species of Aralia (Report of Dr. F. V. Hayden, 1874, pp. 348, 349), of which his Aralia concreta and A. tripartita are perhaps only forms of the species under consideration. Formation and locality: Cretaceous (Dakota group). Fort Harker, Kansas. Aralia triloba Newb. PI. XL, figs. 4, 5. Ann. N. Y. Lye. Nat. Hist., ol. IX (April, 1868), p. 58; Ills. Cret. and Tert. PI. (1878), PL XXV, figs. 4, 5. "Leaves pinnate or ternate; lateral leaflets long-oval, rounded, or slightly heart-shaped, and unequal at base, pointed at summit, sharply serrate throughout; nervation pinnate; texture thin; surfaces smooth. " Trilobate leaf similar in surface, texture, nervation, and marginal serration, but unequally three-lobed; lobes acute, long-pointed." Collected by Dr. F. V. Hayden. The character of these leaves is very well shown in the specimens before me. They seem to indicate a species of Aralia, and have a marked resemblance to some of the leaves of our two most common species, A. racemosa and A. nudicaulis. The trilobate leaf is not commonly found in our Aralias, but there is always a tendency to the production of such a form, and I have frequently remarked it in A. racemosa, as it grows at the West. That is, however, a larger and stronger plant than this was. Formation and locality: Tertiary (Eocene?). Fort Clarke, Dakota. 124 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Order CORNACE^. Cornus Newberryi Hollick. 1 PL XXXVII, figs. 2-4. Cornus acuminata Newb. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 71. (not C. acuminata Weber, Palseontogr. , Vol. II (1852), p. 192); Ills. Cret. and Tert, PL (1878), PL XX, figs. 2-4, under C. acuminata. " Leaves ovate or ovate-lanceolate, long-pointed, acute, entire, nar- rowed at the base, and slightly decurrent; ruidrib distinct, straight or curved toward the summit, following the course of the frequently deflexed point; lateral nerves numerous, regular, and nearly parallel, simple, lower ones straight with a slightly curved summit, upper ones becoming pro- gressively more arched upwards, when near the apex of the leaf curved in so as nearly to join the extremity of the midrib; tertiary nervation so fine as to be hardly perceptible in the fossil state." The specimens of these leaves contained in the collection of Dr. Hayden are quite numerous and pretty well preserved. Although there is no fruit of Cornus associated with them, there pan be little doubt that they are properly referred to that genus. The aspect of the leaves of Cornus is peculiar, and such as is usually readily recognizable at a glance. This facies is given by the outline as well as the nervation. The outline is usually more or less accurately oval, the margin entire, the base rounded or slightly wedge-shaped, the summit pointed and laterally flexed. The nervation is very clearly defined, the midrib strong at the base, tapering gradually till it reaches the extreme point of the apex ; the lateral nerves pinnate, approximated below, more remote above ; all simple, arched upward, those near the summit being - drawn in to join the midrib. This latter characteristic is visible in all the species of Cornus known and is particularly noticeable in the common herbaceous species of C. Can- adensis. It is also very marked in C. Florida, C. sericea, C. alternifolia, etc. The tertiary nervation is generally delicate and sparse, the tertiary branchlets running across obliquely, but with nearly a straight course, between the adjacent lateral nerves. In all these characters, as far as they ■Dr. Newberry's original published name. C. acuminata (1868). was antedated by Weber's, C. acuminata (1852), given to another species. It therefore became necessary to change the name. — A. H. DESCRIPTIONS OF SPECIES. 125 are retained in the fossils before us, we find an entire correspondence with the living genus Cornus, and refer these leaves to that place in the botan- ical series with as much confidence as the foliaiy appendages alone can give. Lesquereux suggests that this plant is identical with his Juglans rhamnoides (Tert. Fl., p. 284), but after a careful comparison of specimens I am compelled to consider them as distinct. The nervation of these leaves is that of Cornus and not of Juglans, and no species of the latter genus has the long, strong petiole on which the blade is decurrent, as in the specimens before \\s. Formation and locality: Tertiary (Eocene?) Fine laminated sand- stone, with Platanus Haydenii and Popnlus Nebrascencis. Yellowstone River, Montana. Nyssa (?) cuneata Newb. PI. XVII, figs. 4-6. Ficus ? cuneatus Newb. Bost. Journ. Nat. Hist., Vol. VII (1863), p. 524. "Leaves obovate or elliptical, shortly acuminate at summit, wedge- shaped at base, decurrent onto the petiole; nervation distinct, flexuous, reticulated; midrib strong; lateral nerves eight or nine pairs gently arched upward, the lower ones curved at the extremities, anastomosing near the margin, the upper ones forked above the branches, meeting and forming a coarse network." The specimens of this plant are too few and two obscurely preserved to permit any accurate determination; for the present it may be left in the genus Nyssa, to some species of which it certainly bears a close resem- blance, both in outline and nervation. Formation and locality: Cretaceous (Puget Sound group). Orcas Island, Washington. Nyssa vetusta Newb. PL I, fig. 2; IV, fig. 4. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 11; Ills. Cret. and Tert, PI. (1878), PI. II, fig. 2, under Magnolia obovata. Magnolia obovata Newb. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 15; Ills. Cret. and Tert. PI. (1878), PI. IV, fig. 4. "Leaves large, obovate, entire, thick, and smooth, pointed and slightly decurrent on the petiole; nervation strong; midrib straight and extending 126 THE LATER EXTINCT FLORAS OF NORTH AMERICA. to the summit; lateral nerves pinnate, set at somewhat unequal distances, straight and parallel below, forked and inosculating above, forming a festoon parallel with the margin; tertiary nerves forming an irregular network of polygonal and relatively large areoles." Collected by Dr. F V. Hayden. Of this species there are numerous specimens in the collections made by Dr. Hayden in as good preservation as the material in which they are fossilized will permit. The nervation is strongly marked, and all its more prominent characters as appreciable in the fossil as they were in the fresh leaves. In nervation, consistence, and outline these leaves are almost un- distinguishable from those of the "Pepperidge" (Nyssa mvitiflora). The primary and secondary nervation of some species of Magnolia also exhibit a strong resemblance to that of these fossils, but a less complete correspond- ence than Nyssa presents. Without the fruit, or at least leaves preserved in a fine argillaceous sediment in which the finer details of nervation are given, the affinity suggested must be to some extent conjectural. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Order SAPOTACEiE. Sapotacites Haydenii Heer. PL Y, fig. 1. Proc. Acad. Nat. Sci. Phil. (1858), p. 265; 111. Cret, and Tert. PI. (1878), PI. Y, fig. 1. Professor Heer compares this leaf with one described by him in his Flora Tertiaria Helvetian under the name of S. mimusojas. He further described it as "diminishing toward the base, rounded toward the apex, rather deepty emarginate. From the midrib, which gradually becomes slender and dies out, proceed at acute angles very numerous secondary nerves, which have the peculiarity of ramifying very much." This is one of the leaves described by Professor Heer from tracings sent him by Mr. Meek, and the specimen now figured is that from which the tracing was made. As it has not before been figured, and is frequently referred to in the earlier discussions of the flora of the Dakota group, it has seemed desirable that a figure should be given of it so that it may be iden- DESCRIPTIONS OF SPECIES. 127 tified. The original tracing of Mr. Meek, on which Professor Heer wrote the name given to the leaf, as well as the original, are before me as I write, so there can be no mistake about the identification of the species. I have seen no other specimens than this one, and have nothing to add to the descrip- tion given by Professor Heer, except that the emargination of the summit is in part at least the result of fracture and may not be a constant character. The peculiar crowded nervation will serve to distinguish this leaf from the others described by Professor Heer and noticed elsewhere (Leguminosites Marcouanus and Phyllites obcordatus), both of which have similar obovate outlines and emarginate summits. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Order OLEACEiE. Fraxinus affinis Newb. PI. XLIX, fig. 5. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 510. "Leaves petioled, lanceolate, long-pointed, attenuate at base; margins coarsely and irregularly toothed at and above the middle." Collected by Rev. Thomas Condon. This leaf has almost precisely the form, serration, and nervation of some folioles of F. Americana now living, but it is narrower and has a more crowded nervation than the average leaflets of that species. Among fossil ashes this approaches closely to F. excelsifolia Webb. (Palaeontogr. IV, p. 150, PI. XXVII, fig. 3), but the dentation in that SDe- cies is much coarser and the nervation more remote. Professor Heer has described two species of Fraxinus (F. predicta and F. denticidata) , both of which Lesquereux thinks he has identified among the Tertiary leaf impressions obtained from the West. The fragments he figures, however, are too imperfect for the identification of the species. They are both described by Professor Heer as sessile, while the leaf before us is distinctly petioled. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. 128 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Fraxinus denticulata Heer?. PI. XLIX, fig. 6. PI. Foss. Arct., Vol. I (1868), p. 118, PI. XVI, fig. 4. Note. — The only manuscript which I have found relating to this figure is a marginal note on the plate referring it to "Fraxinus dentata Heer?," evidently meaning F. denticulata, and the specimen label giving the locality. — A. H. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Fraxinus integrifolia Newb. PI. XLIX, figs. 1-3. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 509. "Leaves short-petioled or sessile; lanceolate; broadest near the base, which, is abruptly narrowed and wedge-shaped; summit narrowed, extrem- ity rounded; margins entire; nervation reticulate, camptodrome; lateral branches connected in elegant festoons near the margins; intervals filled with a network of roundish, polygonal meshes." Collected by Rev. Thomas Condon. These leaves have been referred with some doubt to Fraxinus, but the nervation is almost exactly like that of F. pradicta Heer (Fl. Tert. Helv. Ill, p. 22, PI. CIV, figs. 12 to 13g), and the general form is similar, except that in that species the folioles are unsymmetrical and are generally more or less dentate. Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. Order CAPRIFOLIACE^. Viburnum antiquum (Newb.) Hollick. 1 PI. XXXIII, figs. 1, 2. Tilia antiqua Newb. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 52; Ills. Cret. and Tert. PI. (1878), PI. XVI, figs. 1, 2, under Tilia antiqua. Viburnum tilioides Ward. Bull. U. S. Geol. Surv. No. 37 (1887), p. 107, PI. L, figs. 1-3; LI, figs. 1-8; LII, figs. 1, 2. "Leaves 4 to 5 inches long, nearly as wide, often somewhat unsym- metrical, cordate at base, abruptly acuminate at summit, coarsely and 1 This species was referred to the genus Tilia, by Dr. Newberry, in his original description, but Dr. Lester F. Ward has clearly shown that it belongs in the genus Viburnum.— A. H. DESCRIPTIONS OF SPECIES. ' 129 nearly equally toothed; nervation strong, medial nerve straight, bearing eight or nine pairs of lateral nerves, which diverge at an angle of about 45 degrees. The basilar pair of lateral nerves each sending off five or six branches on the lower side, which are again branched and terminate in the teeth of the margin. The second pair of lateral nerves have each four similar branches, the third pair three, the fourth pair two, the fifth pair one, though there are frequent departures from this rule. The tertiary nerves are strongly marked, leaving the secondary nerves nearly at right angles, crossing directly between the adjacent ones, or anastomosing with some irregularity in the middle of the interspaces." Collected by Dr. F. V. Hayden. There are many fragments of these leaves in the collection before me, embedded in a very fine and hard argillaceous limestone, and very beauti- fully preserved. They exhibit considerable resemblance to the leaves of Morus, especially M. rubra, but in that plant the basilar nerves of the leaves are more developed and reach the margins higher up. The marginal den- tation is also generally more acute in the leaves of the mulberry and the leaves more pointed. The nervation of these fossil leaves is almost pre- cisely that of our common species of Tilia, but in that the marginal denta- tion is much sharper. In a Southern species, however, T. heterophylla, I have found leaves which seem to be the exact counterpart of these; leaves with a roughish surface, strong and regular nervation, just after this pat- tern, and with a coarse, obtuse, and regular dentation. I am, therefore, inclined to refer these fossils to Tilia, and to regard them as the relics of a species closely allied to, if not identical with, T. heterophylla. Formation and locality : Tei-tiary (Eocene?). Near Fort Clarke, Dakota. Viburnum asperum Newb. Pi. XXXIII, fig. 9. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 54; Ills. Cret. and Tert. PI. (1878), PI. XVI, fig. 8. "Leaves ovate in outline, rounded or slightly cordate at base, acute and long-pointed above, margins all cut by relatively large acute teeth; nervation strong, crowded; midrib straight; lateral nerves alternate, about nine on each side, the lowest and strongest bearing each five to six simple branches on the lower side; the lateral nerves of the middle of the leaf mon xxxv 9 130 THE LATER EXTINCT FLORAS OF NORTH AMERICA. carrying one to two brandies at the summits, the upper ones simple, all terminating in the marginal teeth; tertiary nerves numerous, connecting the secondaries nearly at right angles, and generally parallel." Collected by Dr. F. V Hayden. The nervation of these leaves is strong, regular, and crowded. The marginal serration is simple, coarse, and sharp, much like that of the leaves of many species of Viburnum. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. Viburnum cuneatum Newb. PI. LVII, fig. 2. Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 511. "Leaves petioled, long-obovate, 10 centimeters or more in length by 4 centimeters in width; margins entire below the middle; above, set with coarse sub-acute or acute teeth; nervation strong, simple; midrib straight, giving off at an acute angle seven or eight simple, strong nerve branches on either side, which terminate in the teeth of the margin." Collected by Dr. F. V. Hayden. The general aspect of this peculiar leaf is as much like that of Cornus as Viburnum, and if the basal portion alone were shown, few botanists would doubt the propriety of referring it to Cornus. But the upper part of the leaf is very strongly dentate, the simple strong nerve branches terminating in these teeth, a character unknown in the species of Cornus, living or fossil. Some species of Viburnum exhibit a somewhat similar nervation and the dentate margin is much more in character here than in Cornus. It has been thought best, therefore, to refer it provisionally to Viburnum, a genus which seems to have been quite prevalent in late Cre- taceous and Tertiary times on this continent, running into a great number of distinct species. It is true, however, that the lateral nerves in the leaves of Viburnum are always branched, though in some specimens of Viburnum dentatum per- haps only one or two of the branches in a leaf give off branchlets. The dentation is quite that of V. dentatum. Further collections, which will undoubtedly be made in the region where this leaf was found, will doubt- less determine to which of these genera these belong, the counterbalancing DESCRIPTIONS OF SPECIES. 131 characters of nervation and margin leaving it a question which it is now impossible to decide. Formation and locality: Tertiary (Eocene?). Tongue River, Montana. Viburnum lanceolatum Newb. PL XXXIII, fig. 10. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 54; Ills. Cret. and Tert. PL (1878), PL XVI, fig. 10. "Leaves small, narrow, ovate or ovate-lanceolate, rounded or slightly wedge-shaped at the base, pointed above, coarsely and sharply serrate- dentate throughout; nervation strong; midrib straight; lateral nerves about five pairs, diverging from the midrib at an angle varying from 15 to 20 degrees, all slightly and uniformly arched upward, the basilar pair each throwing out at an acute angle about six simple branches, which terminate in the teeth of the margin, the upper branches supporting each one or two similar branches near the summits; tertiary nervation fine, and undistinguishable in the fossil state." Collected by Dr. F. V. Hayden. In the regularity and precision of the nervation these leaves resemble those of Carpinus, but in most species of that genus the serration of the margins is double, while here it is single, and, except in one or two Old World forms, the nervation of the leaves of the living species of that genus is considerably different, the basilar pair of lateral nerves being much shorter and simple or less branched. The style of nervation observable in these fossils occurs in one or two species of Rhamnus, but is there very exceptional, and the marginal serration of Rhamnus is rarely, if ever, so coarse as in the plant before us. In Zizyphus we have a similar nervation, and not a dissimilar style in Celtis, but in neither of these have we such marginal teeth. In Viburnum, however, we have some examples of leaves exhibiting a closer resemblance to the fossils than any I have cited above, as in Viburnum erosum Thurnbg, from Korea, and V. odoratissimum of Japan. In both these plants we find leaves with a great development of the basilar pair of nerves, and a coarse, acute, and regular dentation of the margin. Formation anal locality: Tertiary (Fort Union group). Fort Union, Dakota. 132 THE LATER EXTINCT FLORAS OF NORTH AMERICA. DICOTYLEDONE^E OF UNCERTAIN AFFINITIES. Protophyllum minus Lesq. Pi. IX, fig. 3. Cret. PL (1874), p. 104, PL XIX, fig. 2 ; XXVII, fig. 1. Note. — So identified by Dr. Newberry, as indicated by memorandum; on margin of plate. — A. H. Formation and locality: Cretaceous (Dakota group). Fort Harker, Kansas. Peotophyllum multinerve Lesq. PL VII, fig. 4. Cret. Fl. (1874), p. 105, PL XVIII, fig. 1. Pterospermites multinervis Lesq. Hayden's Ann. Rept. 1871 [1872], p. 302. The figure now given shows the basal portion of a leaf which may have been 6 inches in diameter. It is intended to exhibit its peculiar sub-peltate character by which it may be at once recognized. More or less complete leaves of this species are quite common in the Cretaceous rocks of Kansas, and a large number are in my possession. None of these are absolutely perfect, but some are so nearly so as to permit me to add something to the description given by Lesquereux. The leaf when in normal form was nearly orbicular, being slightly pointed above, uniformly rounded at the base, and evidently somewhat cupped by the interior insertion of the petiole. The margin was entire or slightly undulate, the nerves strong, regular, approximately parallel, camptodrome, the branches terminating in the prominences of the margin where it is undulate. The resemblance of the?e leaves to those obtained from the Tertiary of Greenland and described by Heer under the name of Pterospermites (P. dentatus, P. integrifolius, P. spedabilis, and P. alternans) is very striking and gives presumptive evidence of botanical affinity. The large leaves brought by Dr. W. H. Dall from Alaska and figured on Pis. LIII and LIV evidently belong in the same category and may not be specifically different from Heer's P. spectabilis. No satisfactory conclusion, however, can be reached in regard to the relations of this group of leaves until the fruits belonging to the same tree shall be found. DESCRIPTIONS OF SPECIES. 133 Formation and locality. ■ Cretaceous (Dakota group). Fort Harker, Kansas. Protophyllum Sternbergii Lesq. PL X; XI. Cret. PL (1874), p. 101, PL XVI ; XVIII, fig. 2. Pttrospermites Sternbergii Lesq. Hayden's Ann. Rept. 1872 [1873], p. 425. The specimens figured on Pis. X and XI represent but parts of some of these magnificent angiospermous leaves found in the Dakota group of Kansas. They apparently represent Lesquereux's P. Sternbergii, but are perhaps not distinct from those described by him first as Credneria Lecontiana, and subsequently Protophyllum Lecontianum. The leaf figured on PL X seems to have been nearly round and at least 12 inches in diameter; that represented on PL XI was more ovate and was still larger. Both were included in the collections made at Fort Harker by Mr. Charles H. Sternberg, and Lesquereux has done only justice to him by attaching his name to the finest species contained in the large collection of fossil plants which he made there. As previously remarked, no satisfactory relationship has been estab- lished between Protophyllum and living genera of plants, but I would suggest that some of the species of Cocoloba, such as C. pubescens, present many points of similarity of structure. Formation and locality: Cretaceous (Dakota group). Fort Harker, Kansas. Pterospermites dentatus Heer. PL LIU, figs. 1, 2; LIV, fig. 4. PL Foss. Arct., Vol. I (1868), p. 138, PL XXI, fig. 15b; XXIII, figs. 6, 7. The leaves here represented are probably not distinct from those described by Professor Heer under the above name, although the fragment which he had did not permit him to give a full characterization or satisfac- tory figures. His description consists of three words: "Foliis, siib-peltatis, dentatis," all of which is true of the much more complete specimens before us, but they also show that the base of the leaf is entire, or nearly so, the upper margin variably dentate or nearly entire. These specimens also show that the leaves of P. dentatvs — if we acccept that name for the 134 THE LATER EXTINCT FLORAS OF NORTH AMERICA. species — are variable in size, in the strength of the nervation, and in their degree of perfoliation. Hence it is highly probable that the three species described by Professor Heer from the arctic regions, namely, that cited above, and his P. spectabilis and P. alternans (Fl. Foss. Arct, Vol. II, Abth. IV, p. 480, PI. XLIII,fig. 15b; LILT, figs. 1-4, and LIV, fig 3), will ultimately be combined in one. The specimens before us were brought by Mr. W. H. Dall from the Yukon River, in Alaska. They show that the plant which bore them was of strong, luxuriant growth, probably a tree of large size. No other species is immediately associated with this in the collection made by Mr. Dall, but the formation in which it occurs is undoubtedly of the same age with that at Cooks and Admiralty inlets — the so-called Arctic Miocene — and this tree formed a part of the luxuriant vegetation which included the gigantic Quercus Gronlandica, Ficus Alaskana, etc., and covered Alaska in Tertiary times. Formation and locality: Tertiary (Miocene). Yukon River, Alaska. Phyllites carneosus Newb. PL XLI, figs. 1, 2. Ann. N. Y. Lye. Nat, Hist., Vol. IX (April, 1868), p. 75; Ills. Cret. and Tert. PL (1878), PL XXVI, figs. 1, 2. " Leaves large, fleshy, and strongly nerved, orbicular in outline, cordate or rounded, often uusymmetrical at the base, obtuse at summit, margins wavy or coarsely and deeply scalloped ; nervation strongly marked throughout ; medial nerve straight, or nearly so, frequently pro- duced into a long and strong petiole ; lateral nerves in six to eight pairs, all more or less forked; lower pair short and curving downward soon after leaving the midrib ; second pair also curved outward near the base, and reaching the baso-lateral margin by a course nearly at right angles to the line of the midrib ; third pair strongest, much branched on the lower side above the middle; upper pairs once or twice forked near the summit; tertiary nerves parallel, simple, straight or gently arched, given off at right angles from the secondary, which they connect." Collected by Dr. F. V. Hayden. Up to the present time I have failed to identify these leaves with those of any genus known, living or fossil. In general form they resemble DESCRIPTIONS OF SPECIES. 135 those of Coccoloba, and must have belonged to some plant having much the habit of C. uvifera; but the leaves of that plant are entire, and the nervation is quite different. One of the other species of Coccoloba, which grows in the West Indies, C. diversifolia, has leaves with a marginal serration, and a nervation more like that of the leaves before us, but both margins and nerves are unlike. The leaves which I have designated by the name of Phyllites cupa- nioides, as it seems to me, should be generically united with these. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. Phyllites cupanioides Newb. PI. XLI, figs. 3, 4. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 74; Ills. Cret. and Tert, PI. (1878), PL XXVI, figs. 3, 4, under P. venosus. "Leaves large, fleshy, ovate, elliptical in outline, rounded at base, sub-acute at summit, margins coarsely and obtusely toothed above, simple or waved below; nervation pinnate, strong; midrib straight or flexuous, lateral nerves, about six on each side, crowded below, more remote above, basilar pair short and simple, uniting above with the tertiary branches of the second pair to form a marginal festoon, middle secondaries each bearing one or two branches near the summits, upper one simple; tertiary nervation distinct, forming lattice-like bars connecting the secondary nerves at right angles." These fine leaves exhibit a resemblance in their texture and crenate margins to those to which I have given the name of Phyllites carneosus. They are, however, of different form, and have more simple and rectilinear nervation. The collection of Dr Hayden contains a great number of frag- ments of this species, but up to the present time I have failed to find among living plants any which afford a satisfactory comparison with them. A general similarity in form and nervation to Cupania, and especially to C. Americana, has suggested the name adopted, but it can not be said that the correspondence is very close. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. 136 THE LATER EXTINCT FLORAS OF NORTH AMERICA. Phyllites obcordatus Heer. PL V, fig. 2. Proc. Phil. Acad. Nat. Sci., 1858, p. 266; Ills. Cret. and Tert. PL 0878), PL V, fig. 2, under Leguminosites Marcouanus. This is the leaf described by Professor Heer from a tracing' by Mr. Meek and figured in Dana's Manual of Geology with the name Legumino- sites Marcouanus, and described and figured by Lesquereux in his Cre- taceous Flora, page 90, PI. XXVIII, fig. 2, under the name of Bumelia Marcoiiana. The original tracing now before me, bearing Professor Heer's name written with his own hand, renders the identification easy and certain, and shows, as remarked elsewhere, that the names of this and the associ- ated obovate emarginate leaf have been interchanged Lesquereux, supposing that Professor Heer had applied the name Leguminosites to this leaf, which he has shown to be long-petioled, and therefore almost certainly not belonging to a leguminous plant, changed the name to Bumelia, but as mentioned elsewhere, the name Leguminosites was applied to another leaf, and this must stand as Phyllites until some good reason can be given for transferring it to another genus, and in that case it would be necessary to retain the specific name obcordatus. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Phyllites Vanon^e Heer. PL III, fig. 8. Nouv. Mem. Soc. Helv. Sci. Nat., Vol. XXII (1866), p. 22, PL I, fig. 8; Ills. Cret. and Tert. PL (1878), PL III, fig. 8, under Diospyros primaiva. Note. — So identified by Dr. Newberry, as indicated by memorandum on specimen and margin of plate. — A. H. Formation and locality: Cretaceous (Dakota group). Blackbird Hill, Nebraska. Phyllites venosus Newb. PL XXX, fig. 4. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 75; Ills. Cret. and Tert, PL (1878), PL XXIV, fig. 4. "Leaves thick and fleshy, irregularly oval in outline, rounded or slightly heart-shaped at base, blunt-pointed above, unsymmetrical throughout, mar- DESCRIPTIONS OF SPECIES. 137 gins entire or serrate, nervation strong, pinnate, midrib flexuous, lateral nerves arched upward, branching at summit." Collected by Dr. F. V. Hayden. I have been able to detect no relationship between these leaves and those of any living plants, and publish the figures and description given in hopes that others may be more successful. They have the general aspect of those of a Lauraceous tree, but I suspect they are related to those now described under the names of P. carneosus and P. cupanioides. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. NOKDENSKIOLDIA BOREALIS Heer. PL LXVIII, figs. 4-6. Fl. Foss. Arct., Vol. II, Abth. Ill (1870), p. 65, PI. VII, figs. 1-13. Professor Heer describes a capsulary dry fruit which he has called by the name given above. It occurs in groups, is spheroidal, dehiscent, with ten to twelve carpels of which the section is wedge-shaped, the smaller angle turned inward to a central vertical axis. Professor Heer compares this fruit with that of Cistus ladaniferus, to which it has a general resem- blance. It was collected at Cape Staratschin (Spitzbergen) with Nymphcea arctica and fragments of Phragmites and of Sparganium; also at Atanekerd- luck (Greenland). From its associates in Spitzbergen it would seem to be the fruit of an aquatic plant. In the Green River Shales Dr. White has collected numerous specimens which are apparently identical with those described by Heer. Some of these are grouped in such a way that it is evident that the fruit was compound; that is, a number were aggregated in a spike or crowded panicle, while the scattered capsules represented in our figs. 5 and 6 are distinctly pedunculated and apparently terminated in a rostrum, the prolongation of a central axis. After a somewhat extended comparison with the fruits of various plants, I am compelled to question the conclusion that these have any botanical affinity with Cistus, and it seems to me the plant here represented was more likely allied to Allisma. By the examination of the fruit of our Alisma plantago it will be seen to be a rounded head, flattened or excavated above, consisting of a number of triangular capsules combined precisely as in the Nordenskioldia. This resemblance, taken in connection with the apparent 138 THE LATER EXTINCT FLORAS OF NORTH AMERICA. aquatic habit of the plant, justifies at least a conjecture that we have in these fruits relics of an allismoid plant larger and stronger than our living Alisma plantago, but further collections will be needed to justify or disprove this inference. Formation and locality: Tertiary (Green River group). Green River, Wyoming. Carpolithes spinosus Newb. PI. LXVIII, figs. 2, 3. Proc. U. S. Nat. Mus., Vol. V (March 31, 1883), p. 514. "Fruit enclosed in an exocarp composed of three elliptical or lenti- form segments, furrowed along the middle line of the dorsum and bristling with erect, acute spines 6 to 8 millimeters long; peduncle cylindrical, strong, 1 inch or more in length." Collected by Prof. I. C. Russell. A figure is given of this fruit because of its remarkable character rather than with the hope of establishing its botanical relations. Its occur- rence associated with many palm leaves and its tripartite division afford presumptive evidence that it belongs to the palms, but no living palm fruit suggests itself as an analogue. Apparently all that we see here is a husk or envelope which probably inclosed an elliptical nut that was partially protected by the bristling spines of the outer surface. Formation anal locality: Cretaceous (Laramie group). North Branch of Purgatory River, Colorado. Carpolithes lineatus Newb. PI. XL, fig. 1. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 31 (name only); Ills. Cret. and Tert. PI. (1878), PI. XXV, fig. 1. NOTE. The only manuscript which was found relating to this figure is a memorandum of the name and locality on the plate margin. The following descrip- tion was prepared from an examination of the figure : Fruit rounded, elliptical in outline, five-eighths inch long by one-half inch wide, beaked, finely striate in direc- tion of greater dimension. — A. H. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. DESCRIPTIONS OF SPECIES. 139 Calycites polysepala Newb. PI. XL, fig. 3. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 31 (name only); Ills. Cret. and Tert. PI. (1878), PI. XXV, fig. 3. Note. — The only manuscript which was found relating to this species is a memorandum of the name and locality, on the plate margin, in Dr. Newberry's handwriting. The following description was prepared from an examination of the figure : Organism calyx-like, sub-circular in outline, about 1^ inches in diameter, consisting of six divisions (sepals ?), each of which is about three-eighths inch long by three- sixteenths inch wide at base, tapering to an acute point. — A. H. Formation and locality: Tertiary (Fort Union group). Fort Union, Dakota. 140 THE LATER EXTINCT FLORAS OF NORTH AMERICA. TABLE OF DIS List of species, showing locali h o IS .S .a 43 o oj of Species. a a U-S a £ z '- C os '%■ 03 P3 -. X - - -. S a c3 t^ 'C - p. 3 c So 1 M ss Q 03 03 aj a 3 M a s>> -a o a P. s c 60 S o .M o3 Q -i. T. f a re 'X u ID M r. = o P. 3 z it (§ O 03 Q ri ^£ - s M : 03 3 3 z ■~ 61 g c ,44 to n s ^: 7 ■~ -Z '_ X. ~' 1 - X 3 O 53 to £ - = 03 4- O a =3 & to 03 ~ A 0J iZi :i a *E X ■a o o p. s r - o3 43 .33 s fi n' M 7. - - F^ ■*J o CD o P. o cS 43 o M r. Z i D m © 'o q o p. - p be cS O o3 ft 6 w M © - a ; a? © p. 3 03 43 O ,M 03 G of +3 O M 03 a - s X jf ID to o to 03 o '3 s ? © z •-: 1* i o P. © Pi 3 o to ■3 a o cc 43 o at 3 n 7 03 t. ID >■ a o o a 03 l> d" a '3 3 03 S5 p. - o 60 -r = - o X 43 - 3 Hi C ,g 3 r. 03 43 3 a a & u O P. 3 o 60 ■3 3 3 O X o s" g 3 03 ci & >. r. n a 03 33 6C O ffl a _o 43 03 a h z Ba 03 B 03 a c bi a a o e» IS of u o g '3 PL. p. 3 O i s c - & -. = >. c o o © a > P. 3 c 5 ID s (-■ ca d d9 tH "= O M © in © Hi P. o © d £ "o X = "?. C s c a o 43 03 1 1 3 6 7 7 8 10 11 13 14 14 15 15 16 16 17 18 18 19 20 20 21 22 23 24 25 27 27 1 2 3 1 5 6 7 s 9 10 11 li 13 14 16 16 17 18 2 + + 3 4 5 + fi 7 8 4- 9 in + ii IS! + 13 14 15 + 16 + 17 + 18 + + 19 + + ... + an Sequoia Heerii Lesq 21 22 23 24 Taxodium occidentale Newb 25 Glyptostrobus Europteus (Brong.) Heer. 26 27 28 + TABLE OF DISTRIBUTION. 141 TRIBUTION. ties mentioned in the text. ft H O Fh bJj -- 1 a J d - r O ~ £ S +^ a to a ft 111 P. a o t< to © ' = a a d *a 2: z y m 3 a © X *3 20 a 3 O a e3 d — 1 O © u d •_ 21 ft o Sc © 1 d d d »d d ■- o "E ft O bo o 1 d Fh d J d efi O a" "co d pq Is o o 23 ft o bo Oi 1 d U 6 ?- o "3 o -p a o J © pq P. 3 O Eh to © d - Fh O 'o O CO .a GO 25 P. a o Fh 60 © '1 oi Fh d ti a 1 o d -p 4^ P M - s 26 ft - = fh bi CD a to 3 'a o Fh O fa 03 a w p. 3 U to © 1 u a 60 3 1 O >• a a h o 28 o a 3 o a o 3> to 3 > a~ 3 3 O ~, B~ o t» 3 3 D to g Pi CO 29 a3 *H a" .2 o3 a Fh O fa Fh ft CD p > O t it a d ■a o 'o O a' 2 'o C5 30 CD a CD O o H a o "St a d is d ■9 ea a o .f 3 O 31 + + © 3 © o o H 3' 8 3 ! CD CD U O CO -p ■P S3 32 + CD a CD O O fa o3 -p O ft 03 >. u 3 H 38 a) a © H "S 3 a a © £ 1 < 34 © a © H « © © © h O tn © a D n 35 p. 3 u to 3 3 P a" 3 Q 2 "3 — © (0 O &< 30 P. 3 to a 'a ^> fc a O a h3 +3 O ^. A 3 5 +^ : 1* 37 3 C to a a ti a" O M a n 3 lg a' a U ft 38 P, 3 & a a a' a a a CD > & CD a CO & fx 39 P. p p to a _o a Fh fa of a oa +-> a © © a to a En 40 ft 3 O to © > s a © © to a a *•. ^_ CD a CD CD Fh C6 11 + © a © a a' to © O a a O CD ,a CO £ "d Q 42 a ■: d - "c O a 03 CO CO "C z fa 4:1 CD a CD s a" be CD '- p a cfl 03 •_ H © a © © 3 a" to © O M © © O a 3 3 O 46 + CD a a' to © 5 © © - O © to 2 « 16 © a © a a' M g a to Jl 47 CD a CD U C i of M Oi 03 ■P -. "a Fh < is CD a CD ■_ O s of CO s CD s a M P >* 49 CD fl CD O r 3 of ^= s d — o3 a N -w M 50 CD a CD O O s a bo a la CO 03 a PQ ^a y m a is a a >. "a © a .-)■-• 1 + + + L «! + 1 + + 4 — + + + L 5 6 7 + + R + 9 10 + + 12 + II + 14 i 1 ; 10 17 18 19 + 20 21 23 23 + + + + + (- + + 4- — °5 'fi •'7 28 142 THE LATER EXTINCT FLORAS OF NORTH AMERICA. List of species, showing localities £ o DQ § © 60 d 111 Species. p o 43 d S c 1 -1- © 03 © © E p d § 3 : 60 Tt 43 o •a o5 a d M W t» ja o a CO 2 - s ; 5 d 43 o n a 3 to a d W **" O d m 4 ft p O 60 d C d P 3* J< y. 3 .P V - P O CO 6o S 5 P. c - 60 d 43 Z M a a d .« / 3 -3 6b ~ Pi CO d © O 6 Pi P u 60 3 *3 3 P 3 /. ti p J- 1 o3 O CD Q 7 ft td - Q - s (0 Q o s 8 ft pi r bo e8 O Q d _ CD - CD CD ti O X P o 43 03 43 CD 9 P. 3 O ;- it 3 a 3 a 3' o ^ d 5 o CO .« -z :. 61 d CO III p o d a fl 03 * *- CD o ft ^. CD 11 p. 3 o tl 6D ■3 3 ;/. 3 Hi 'r' s /- (' o o p d t> d a 'd p d 12 Pi 3 " ti 60 •a 3 3 ID 3 - 43 60 C IS 05 d ? of 43 3 3 3 O 3 3 IS Pi P O Ph 60 -O P P o CO 0} 60 P ft 3 C ti 3 12 05 d 3 N 1 .3 60 a M 14 3 3 '-*3 3 5 ?- c ft d P d P s 60 P a c >•. ; K o 4J .2 'o ft* 15 ft c o i-l tUD CD a 3 CD M - a 9 CD a © !> 16 ft 3 z a a d d ►J d -3 d J w ^: 3 © ft 00 © 31 O 0] ft 17 + ft 3 O u an © 'a ti 3 O ■3 d u o 'o -i 3 3 3 P O P o +3 d a 18 ■X) 28 30 30 31 32 33 33 33 34 35 37 37 38 40 41 41 42 43 44 44 45 46 47 48 49 50 51 51 53 I 30 + 31 3* 33 34 35 3fi 37 BR 39 + 40 41 4« + 43 44 + + + + 45 46 — 47 + 48 49 + + + 50 51 52 53 Populus nervosa elongata Newb 54 55 + 5fi 57 TABLE OF DISTRIBUTION. 143 mentioned in the text — Continued. 19 + SO L'l _':i L'4 ■2.-) 26 ■_•; 28 29 30 :!1 82 :!:! 84 :c, .'i<; S! S9 + + III + + II 42 13 II I.". ii; 47 IN III 50 a >. a n ~ ,a Eft .-,1 52 + 30 31 32 33 31 35 36 37 38 39 10 11 12 IB 41 15 16 17 18 19 50 51 52 53 51 55 56 57 144 THE LATER EXTINCT FLORAS OF NORTH AMERICA. List of s})eeies, showing localities i & CO a 43 X a 'E ca M - p So 03 *0 q co C3 co a a M w !» M o 5 03 & o bo a o S3 Q co cS CQ CD w 3 fn 3 + P. p & 43 o o3 Q 03" m "© IZi s jo M c c3 3 4 P. 3 & cS 43 o M 03 Q o3~ .M CO eg ,2 01 & h s M 3 O CO 60 3 5 » p c h 60 c3 o M r. a =? At CO CS (D IX p. CD CD O 6 Pi 3 : & O •3 - of eg U — •~£ ■■- c ": ft o s 8 o & O M e8 n Q O *M CD It M CD CD t-. CD o en CD ■= 9 Pi 9 o H a a o M 03 a 03 O « 03 Q j3 43 9 O to CD CD ti o CD M CO 10 § a : CD CD 00 CD •-3 & 43 p. o >. CD M 11 1 | 2 CO +? CD bo 3 •o DO en 3 P> fd o o q > 6 a C8 a & ia 3 o ic ■I. 43 60 0< a o 43 60 p p: V} eg 2 a CS ^ o 3 *1 O 13 = a pj 60 o CO 43 CD 60 a h a' a +3 &T a 3 w a 60 a n 14 a a 43 c3 a o C8 a ca a o ~, 60 a a CO o o .a ft IS Pi 3 P 60 CD s CO d o M CD CD a" o a OS o CD a CD 16 Pi a o - 3 ■- 1 r. 6 ■a s o "o o M 03 (D CO CD CO E 17 Pi 3 o 60 g 03 - 5 o □ 5 a s a a "o3 is 58 54 54 55 56 57 58 59 59 60 61 62 63 63 64 65 65 66 66 67 67 68 69 69 70 71 71 73 73 74 1 2 59 6(1 Salix euneataNewb _ + + 61 + + + + 62 Salix foliosaNewb 63 Salix MeekiiNewb _ + + 61 Salix membranaceaNewb--- + 65 66 Corylus Americana fossilis Newb 67 Corylus MacQuarrii (Forbes) Heer _ IIS tin Corylus rostrata fossilis Newb 70 71 72 Betulasp.? Newb... 73 Alnus Alaskana Newb 74 Alnus serrata Newb. 75 Alnus serrulata fossilis Newb 76 Alnus sp.? Newb 77 Alnites grandifolia Newb + 78 Fagus cretaceaNewb + 79 Quercus antiquaNewb + 80 Quercus banksiaaf olia Newb + 81 Quercus castanoid.es Newb 82 Quercus castanopsis Newb 8.1 Querent cnrminiilis N^wb 84 Quei'cus coriacea Ne w b . . . + 85 Quercus dubia Newb 86 Quercus elliptica Newb _ + | TABLE OF DISTRIBUTION. 145 mentioned in the text— Continued. 19 20 i\ 22 Hi ■J I A 26 28 81 :;•_• :::: ::i se S! 38 39 III II 12 13 It 4.1 16 (7 4s 40 BO 51 52 58 59 till 61 63 63 64 65 + 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 + + MON XXXV- -10 146 THE LATER EXTINCT FLORAS OF NORTH AMERICA. List of species, showing localities M u o Is CO c CD bG Species. 'i s | « © 1* ID h O > s 3 eg *-* *c 03 - 5 c Ih cm "o p OS / 3 s M s tx ,=) o to 0. p S O ■a Q ■J. at 1=1 o3 w d B 'S o ca izi IS P. 3 O Si T 3 C X -tf :. :/. 3 Ph O 43 bn s 3 en CO I* in 43 3 C CO V O 18 + - 3 C il ■d 5 : CQ 43 bo 3 C- 3 O 43 :t 3 3 CO CO c3 - CO ;r. a B 14 3 3 3 h c3 a CO 43 g 3 O CO ^3 o o P3 v a CO o a .© !> 16 s = (0 I J — $ ■~ z 'z M © m © o -/. fa 17 P. £ © 'i - O* -r c "c w X a "S a = o a o 4^ tf 18 87 74 75 75 76 76 77 78 78 79 80 SI 81 81 82 83 84 S4 85 85 87 88 88 89 90 91 92 93 94 94 1 2 3 4 S Ci +■ 89 90 91 93 + IS 94 + 95 96 97 98 . 8 60 £ 1!) O & CD a c3 o' c3 3 *o O bo a p © CO 'eg •2(1 P. 3 c to a is 6 c CD o P CD 21 P. d & CD S c3 e8 o' «tf d! h 3 o CD*" '£ 32 P. o J-c bo CD o3 o" -d ■5 'o .9 "S3 c$ pq 1-3 O O 28 Ph CUD © s c3 U Tt o o O p o 1 I m ■-•4 p. B o s* to CD 1 eg 3 1-1 d CO a _r 'o Q /. aa m c3 a 25 P. a o s CD | ci Fh rf J si a 1 o CD a n o 3 L'li P. 3 o a 60 CD 1 c3 60 a 1 o CO a a •-•7 p. a o a so CD ca U e8 bZ B 'a o PI d .a O 38 a z a 3 u o t, z ■1 bfi d ,3 03" 5 93 a o a a' o >> a CO O 6C a 'B p. 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B a z P. a P. a c P c P. +- s fin r 6n M u o CD += , M 1 03 a o s- u cg -*j O JO C3 Q 3 o o a 09 i> d | P =3 12 bo - P o 32 «P CD bo = C o +^ tx g CD o3 ? CD 49 1 u IS T3 s a o CD tn a & B o 3 CD i* 09 - 60 fl = 11 c3 a Fh O 09 a 08 -p a o S so a 1 o >> Cfl o « p '5 r^ 15 Eh b0 CD I - 03 _s 'S o It © a" o fl o r a © i> 16 P. 3 p to © 'I c3 (- c3 6 id b3 c o CD DO S fl o so 17 P O u bo .2 S d o" 13 =3 h C _ of .s c8 -z 3 s a o 09 - IS 1 2 3 4 5 6 7 llti 9-t -(- 117 95 + 118 95 96 + + 119 vo 97 i°i 98 99 + + + v*> 1°3 100 + 1°+ 100 IBS 101 + -f 1"R 1(12 103 1°7 1?S 105 106 1(19 + if*) 130 131 11(1 + 13° 111 118 133 134 112 113 113 ia5 13fi 137 114 115 115 llti 117 " 138 139 140 HI U? 117 143 118 118 144 Rhamnites concinnus Ne wb TABLE OF DISTRIBUTION. 149 mentioned in the text — Continued. p. ~. U bo © 1 ca d -d e$ ^o 'o O t- i u u Ph 19 p. o F-. bo © i (S (h cj -J d CS F- ; 'o O ho a © CO ™ 20 p. p o u SO © a s d ■d ca f-> o '3 O © © O 23 P. 3 O Si CD 1 ca ca d Ed q o .2 H 22 p. 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O o 44 e3 Q ,d ■+a o -a •M Fh CD cc 43 fa 86 1 o 3 O 3 t= 43 - : fa ca' 43 o M CS a o fe if 1 O o fa it; 3- a M a z I 43 o fa ca' c il ca n A 43 h o a' o a t) fa .•is p. a o h 60 P O P & Fh o ca" P. o s CD a o +a * o 39 P. a o ■~ 60 § 3 t> h O ■3=t of a 03 a o > 2 © 60 P O En 40 Pi 3 O u 60 h a > 2 p © © o 60 p 1 © > 2 p © © u S3 41 + CD P3 CD O O 3 o be CD U O of a 'o O CD O 00 » § O 00 CD CS pq U 44 CD a 5 3 : M P ^ © 3 © O ca' n ca d A c8 a N "O O M 50 CD a CD O Z S B 43 60 3 ja ca 13 PP « 3 51 a O 3 43 O a >. 43 a a u 52 145 + 146 + 147 + 148 ll'i + + 150 + 151 15? 153 154 + + + 155 156 157 + + + 158 159 + inn + 161 lii" 163 164 + 165 + + 166 167 168 169 + 170 + 171 + 17"' + + 173 174 PLATES 153 PLATE I. 155 PLATE I. Page. Fig. 1. Quercus salicif olia Newb . _ _ _ _ 77 2. Nyssa vetusta Newb __ _ ._ 125 3. Fagus cretaoea Newb 68 4. Platanus latiloba Newb __. 105 5,5a. Araucaria spatulata Newb _ _ 17 6. Sphenopteris corrugata Newb _.. ._ 14 7. Pyrus cretacea Newb .-. 110 156 U.S. GEOL. SURVEY OF THE TERRITORIES CRETACEOUS. PLATE I. Gipcl*Jr-fc Smi.LiI PLATE II. 157 PLATE II. Page. Figs. 1,2. Salix cuneata Newb. _._ _-. . 55 3. Salix MeekiiNewb - 58 4. Salix flexuosa Newb 56 5-8a. Salix niembranacea Newb 59 158 U.S. GEOL. SURVEY OF THE TERRITORIES CRETACEOUS, i Dakota r.rnnn. PLATE II c: PLATE III. 159 PLATE III. Page. Figs. 1,2. Populus elliptica Newb __ 43 3,4. Populus cyclophylla Heer - -- 41 5. Populus microphylla Newb 46 6. Populus litigiosa Heer . . . 45 7. Populus (?) cordifolia Newb.. --- 40 8. Phyllites Vanonte Heer - -- 136 160 U.S GEOL. SURVEY OF THE TERRITORIES. CRETACEOUS. ; Dakota Group ) PLATE III Thos Sinclair* Son. Lift.' PLATE IV. 161 MON XXXV 11 PLATE IV. Page. Fig. 1. Populus cyclophylla Heer . . 41 2. Alnites grandif olia Newb _ 67 3. Populus (?) Debeyana Heer _. 42 4. Nyssa vetusta Newb _ 125 163 U. S. GEOL. SURVEY OF THE TERRITORIES. CRETACEOUS. (Dakota Group.) PLATE IV. i \ ■ PLATE V. 163 P L A T E V . Page. Fk;. 1 Sapotacites Haydenii Heer ...-. -. --- 126 2. Phyllites obcordatus Heer .... --• - 136 '■'>. Leguminosites Marcouanus Heer 113 4. Liquidambar obtusilobatus (Heer) Hollick . 101 5. Populus ( ? ) cordif olia Newb - ...__ 40 6. Magnolia alternans Heer ? - 94 7. Populus (?) Debeyana Heer _ 12 164 U. S. GEOL. SURVEY OF THE TERRITORIES. CRETACEOUS. (Dakota Croup.) PLATE V. PLATE VI. 165 PLATE VI. Page. Figs. 1-4. Sassafras oretaceum Newb.. _ 98 5, 6. Liriodendron Meekii Heer 95 7. Liriodendron primsevum Newb . 96 166 U.S. GEOL SURVEY OF THE TERRITORIES CRETACEOUS. DhUoIm Group I PLATE VI PLATE VII. 167 P L A T E V I I . Page. Figs. 1-3. Sassafras cretaceum Newb. . 98 4. Protophyllum multinerve Lesq _ . 132 168 ! BE L SURVEY OF THE TERRITORIES CRETACEOUS, i Dakota Group i PLATE VII T. Sinclair S Son. Iiith Philada PLATE VIII. 169 PLATE VIII. Page. Figs. 1, 2. Sassafras cretaceum Newb --- - 9 § 3. Populites elegans Lesq ? 5 * 170 U.S. GEOL. SURVEY OF THE TERRITORIES CRETACEOUS. I Dakota Group. ' PLATE VIII. Thos Sinclair & Son.L'ith. PLATE IX. 171 PLATE IX. Page. Fiu. 1. Aralia (?) quinquepartita Lesq. _____ 12.3 2. Sassafras cretaceum recurvatum (Lesq.) Newb ._ _ 99 3. Protophyllvni- minus Lesq 132 172 'U. S. GEOL. SURVEY OF THE TERRITORIES. CRETACEOUS. (Dakota Group.) PLATE IX. PLATE X. 173 PLATE X . Page. Protophylluru Stembergii Lesq 133 174 U. S. GEOL. SURVEY OF THE TERRITORIES. CRETACEOUS. (Dakota (J re nip.) PLATE X. PLATE XI. 175 PLATE XI. Page. Protophylluni Sternbergii Lesq 133 176 U.S. GEOL. SURVEY OF THE TERRITORIES CRETACEOUS PLATE XI T Sinclair* Son,Lith Philada PLATE XII. 177 MON XXXV 12 PLATE XII. Page. Fig. 1. Magnolia elliptica Newb ... r 94 2, 3. Ficus reticulata ( Lesq. ) Holliok _ 88 4. Liquidambar obtusilobatus (Heer) Hollick 101 178 U. S. GEOL. SURVEY OF THE TERRITORIES. CRETACEOUS. (Dakota Group.) PLATE XII PLATE XIII. 179 PLATE XIII. Page. Fig. 1. Quercus sinuata Newb ._ .- 78 2. Quercus antiqua Newb - -- 69 3, 4. Salix flexuosa Newb _ . - 56 5, 6. Saiix foliosa Newb - 57 180 U. S. GEOL. SURVEY OF THE TERRITORIES. CRETACEOUS. (Dakota Group.) PLATE XIII. PLATE XIV. 181 PLATE XIV. Page. Fig. 1. Salix flexuosa Newb - 56 2. Myrica(?) trifoliata Newb - 37 3-4a. Sequoia cuneata Newb 18 5 Abietites cretacea Newb 18 6. Sequoia gracillima (Lesq. ) Newb _ 19 182 :he territories CRETACEOUS. i Dakcila (>roii|>. PLA T. Sinclair s PLATE XV. 183 PLATE XV. Page. Figs. 1, la. Anemia perplexa Hollick_. 3 2,2a. Nilssonia Gibbsii (Newb.) Hollick 16 184 U.S. GEOL. SURVEY OF THE TERRITORIES. CRETACEOUS. "PLATE .XV \ "-•^i^iiMto lair* Son.Lith Phrtada PLATE XVI. 185 PLATE XVI. Page. Figs. 1, 2. Equisetum robustum Newb._ .. 15 3. Anemia perplexa Hollick 3 4, 5. Aspidium Keimerlyi Newb _ - 11 6, 6a. Sabal imperialis Dn - . - 30 186 CRETACEOUS. U.S. GEOL. SURVEY OF THE TERRITORIES PLATE .XVI T.SinclaiT &Sor Gift 1 h I Ida PLATE XVII. 187 PLATE XVII. Page. Figs. 1-3. Cinnamomum Heerii Lesq _ _ 10O 4-6. Nyssa (?) cuneata Newb __ 125 188 U. S. GEOL. SURVEY OF THE TERRITORIES. ORETACKOl'S. PLATE XVII PLATE XVIII. 189 PLATE XVIII. Page. Pig. 1. Quercus elliptica Ne wb 74 3-5. Quercus banksisef olia Newb _ _ . . _. 69 190 CKETACKOUS. U. S. GEOL. SURVEY OF THE TERRITORIES PLATE XVIII. PLATE XIX. 191 PLATE XIX. Page. Figs. 1-3. Quercus coriacea Newb _ 73 4-6. Quercus flexuosa Newb 74 192 '■VEYOFTHE TERRITORIES. CRETACEOUS PLATE XIX Tho« Sinclair* Son, Lit n PLATE XX. 193 MON XXXV 13 PLATE XX. Page. Figs. 1,2. Populus rhomboidea Lesq 51 3. Quercus elliptica Newb _ _ 74 4. Populus flabellum Newb ... _ 44 5. Quercus coriacea Newb 73 194 U.S. GEOL SURVEY OF THE TERRITORIES. CRETACEOUS PLATE XX TKob Sinclair-*. Son, l.ith. PLATE XXI. 195 PLATE XXI. Page. Figs. 1,2. Sabal Campbelli Newb - 27 196 U.S. GEOL SURVEY OF THE TERRITORIES CRETACEOUS. PLATE XXI PLATE XXII. 197 PLATE XXII. Page. Fig. 1. Caboniba (?) gracilis Newb 91 2. Cabomba ineriuis (Newb.) Hollick,. _ 92 3,4. Equisetum sp. ? Newb.. __ _ 16 5, 5a. Phragmites sp. ? Newb _ _ 27 6. Iris sp. ? Newb - 33 198 TERTIAm: U.S. GEOL SURVEY OF THE TERRITORIES PLATE XXII T. Sinclair &Son,4ith Fhilada PLATE XXIII. 199 PLATE XXIII. Page. Pig. 1. Cabomba(?) gracilis Newb 91 2. Caboinba inermis (Newb. ) Hollick . ._ 92 3. Onoclea sensibilisfossilis Newb . . 8 4. Onoclea sensibilis L. (introduced lor comparison) 9 5. 6. Onoclea sensibilis obtusilobatus Torr. (introduced for comparison) 9 200 U.S. GEOL SURVEY OF THE TERRITORIES. tertiary: PLATE XXIII, T. Sinclair 4 Son Iiith Plulada PLATE XXIV. 201 PLATE XXIV. Page. Fio. 1. Onoclea sensibilis fossilis Newb _ 8 2. Onoclea sensibilis fossilis Newb. (summit of frond) _. 8 3. Onoclea sensibilis fossilis Newb. (pinna deeply cut. with elongated areola) S 4. 5. Onoclea sensibilis fossilis Newb. ( bases of upper and lower pinnae) 8 202 U S GEOL. SURVEY OF THE TERRITORIES TERTIARY PLATE XXIV '.01 :.■■;■ K lia in PLATE XXV. 203 PLATE XXV. Page. Sabal grandif olia Newb 28 204 U.S. GEOL. SURVEY OF THE TERRITORIES TERTIARY PLATE XXV Than 6inc1nir-& Son. Lith, PLATE XXVI. 205 PLATE XXVI. Page. Figs. 1-3. Taxodium occidentale Newb _ 23 4. Sequoia Nordenskioldii Heer? 20 5-5d. Thuja interrupta Newb 25 6-8. Glyptostrobus Europa?us ( Brong. ) Heer __._.._ 24 8a. Scale of Glyptostrobus Europseus (Brong. ) Heer 24 9. Cone of Sequoia gracillima (Lesq.) Newb.? . 19 206 U.S. GEOL SURVEY OF THE TERRITORIES tertiary: PLATE XXVI T. Sinclair * Son. Jlith Philada. PLATE XXVII. 30T PLATE XXVII. Page. Fig. 1. Populus genetrix Newb - 44 2, 3. Populus nervosa Newb .- 48 4, 5. Populus Nebrascencis Newb -- *i 208 U.S. GEOL SURVEY OF THE TERRITORIES. TERTIARY PLATE XXVII Tnos Sinclair fc So.i_l.il}> PLATE XXVIII. 209 MON XXXV 14 PLATE XXVIII. Page. Fig. 1. Populus nervosa elongata Newb — - - 49 2-4. Populus cuneata Newb _- _ - 41 5-8. Populus acerifolia Newb - - 37 210 TERTIARY. U. S GEOL. SURVEY OF THE TERRITORIES. PLATE XXVIII. PLATE XXIX. 211 PLATE XXIX. Page. Figs. 1-4. Populus rotundifolia Newb ._ ..- 51 5. Populus sinilacit'olia Newb __ 58 6. Populus cordata Newb ._ 38 7. Populus cuneata Newb 41 8-10. Corylus Americana fossilis Newb . . . 60 212 U. S. GEOL. SURVEY OF THE TERRITORIES. TERTIARY. PLATE XXIX. PLATE XXX. 213 PLATE XXX. Page. Fig. 1. Sapindus affinis Newb - - 116 2, 3. Sapindus (?) niembranaceus Newb._ 117 4. Phyllites venosus Newb - - 136 214 U. S. GEOL. SURVEY OF THE TERRITORIES. TERTIARY. PLATE XXX. PLATE XXXI. 215 PLATE XXXI. Page. Figs. 1-4. Carya antiquorum Newb 35 5. Negundo triloba Newb .. _ 115 216 TERTIARY. U. S. GEOL SURVEY OF THE TERRITORIES. PLATE XXXI. 2 {,- :'■ jflttj ; mm ■ ■ i: ■ PLATE XXXII. 217 PLATE XXXII. Page. Figs. 1-3. Corylus rostrata fossilis Newb 63 4. Corylus orbiculata Newb _ _ 62 5. Corylus MacQuarrii (Forbes) Heer 61 218 U. S. GEOL. SURVEY OF THE TERRITORIES. TERTIARY, PLATE XXXII. PLATE XXXIII. 319 PLATE XXXIII. Page. Figs. 1,2. Viburnum antiquum iNewb. ) Hollick 128 3,4. Planera microphylla Newb . _.. .-- 81 5.6. Rhus (?) nervosa Newb _ - - - 111 7 (8?j. Rhamnites concinnus Newb 118 9. Viburnum asperum Newb 129 10. Viburnum lanceolatum Newb - 131 11. Ahius serrata Newb _ 66 220 TERTIARY, U. S. GEOL. SURVEY OF THE TERRITORIES PLATE XXXIII PLATE XXXIV. 221 PLATE XXXIV Page. Platanus nobilis Newb - - 106 222 U.S.GEOL. SURVEY OF THE TERRITORIES. ■ ; "~; TERTIARY. 4/ i " <\:' PLATE XXXIV. \ "% •.fv m \, "*• 1 M si ^ I / M / / / PLATE XXXV. 233 PLATE XXXV. Page. Platanus Raynoldsii Newb - - 109 234 TERTIARY. U.S.GEOL SURVEY OF THE TERRITORIES. PLATE XXXV. PLATE XXXVI. 225 MON XXXV 15 PLATE X X XVI. Page. Platanus Haydenii Newb __ _ 103 226 TERTIARY. U. S. GEOL. SURVEY OF THE TERRITORIES. PLATE XXXVI. PLATE XXXVII. 227 PLATE XXXVII. Page. Fig. 1. Platauus nobilis Newb _ 106 -4. Cornns Nevvberryi Hollick. ... _ _.. ___ 124 Quercus dubia Newb _ 73 228 o TERTIARY. U. S. GEOL. SURVEY OF THE TERRITORIES. PLATE XXXVII. PLATE XXXVIII. 239 PLATE XXXVIII. Page. Platanus Haydenii Newb. ( young leaf ) 103 230 TERTIARY. U.S.GEOL. SURVEY OF THE TERRITORIES. PLATE XXXVIII. PLATE XXXIX. 231 PLATE XXXIX. Page. Aristolochia cordifolia Newb - 90 QQO now U. S. GEOL. SURVEY OF THE TERRITORIES. TERTIARY. PLATE XXXIX PLATE XL. 233 P L A T E X L . Page. Fig. 1. Carpolithes lineatus Newb ...._. 138 2. Sapindus affinis Newb __ _ _. 110 3. Calycites polysepala Newb. _ 139 4,5. Aralia triloba Newb.. . _ _. _ 123 6. Amelanchier similis Newb 111 7. Aristolochia cordif olia Newb. .... . 90 234 0. S. GEOL. SURVEY OF THE TERRITORIES. TERTIARY, PLATE XL. PLATE XLI. 230 PLATE X L I . Page. Figs. 1.2. Phyllites carneosus Newb , 134 3,4. Phyllites cupanioiiles Newb ._ _ _. 135 236 TERTIARY. U. S. GEOL. SURVEY OF THE TERRITORIES PLATE XLI. PLATE XLII. 337 PLATE X L I I . Page. Figs. 1-3. Platanus aspera Newb . . . _-. - 102 238 U. S. GEOL. SURVEY OF THE TERRITORIES TERTIARY. PLATE XLI PLATE XLIII. 239 PLATE XLIII. Page. Fig. 1. Quercus paucidentata Newb _ 76 2-5. Quercus consimilis Newb Tl 6. Quercus simples Newb . __ 78 7. Acorn of Quercus consirnilis Newb. 72 8. Cupule of Quercus consimilis Newb _. 72 9. Base of acorn of Quercus consimilis Newb _.. 72 10. Interior of cupule of Quercus consimilis Newb 72 240 TERTIARY. U. S. GEOL. SURVEY OF THE TERRITORIES. PLATE XLIII PLATE XLIV. 341 MON XXXV 16 PLATE X L 1 V Figs. 1-4. BetulaheterodontaNewb... - 5. Platanus aspera Newb. 242 Page. 64 102 TBKTIAUV. U. S. GEOL. SURVEY OF THE TERRITORIES. PLATE XLIV PLATE XLV. 243 PLATE X L V . Page. Fig. 1. Betuia heterodonta Newb 64 3-5, 8. Ulnms speciosa Newb _ 80 6. Fruit of Betuia heterodonta Newb _ . . 65 7. Fruit of Ulmus speciosa Newb 80 244 U . S. GEOL. SURVEY OF THE TERRITORIES. TERTIARY PLATE XLV. PLATE XL VI. 245 PLATE XLVI. Page. Fig. 1. Ficus planicostata Lesq 88 2. Grewia crenata (Ung.) Heer .. 120 3, 4. Populus polymorpha Newb _ _ _ 50 i>. Betula angustifolia Newb _ __. 63 6. Alnus serrulata fossilis Newb 66 7. Fruit of Alnus sp. ? Newb_ . 67 8. Fruit of Acersp. f Newb ._ - 115 9. Monocotyledon gen. et sp. ? Hollick _ 33 10. Fruit of Cassia sp. ? Newb 113 246 U.S.GEOL. SURVEY OF THE TERRITORIES. TERTIARY. PLATE XLVI. PLATE XL VII. 247 PLATE X L V 1 1 . Page. Figs. 1,3. Liquidambar Europa?uni Al. Br .. 100 3. Fruit of Liquidambar Europaeuin Al. Br 100 4. Populus polyinorpha Newb _ _ 50 5. Betula angustifolia Newb,. 63 6. Taxodium distichuui miocenum Heer - 22 7. Fruit of Sequoia Heerii Lesq 20 248 TERTIARY. U. S. GEOL. SURVEY OF THE TERRITORIES. PLATE XLVh. \ w PLATE XL VIII. 249 PLATE XLVIII Page. Fig. 1. Crataegus flavescens Newb 112 2,3. Grewia crenata (Ung.) Heer 120 4. Corylus MacQuarryi (Forbes) Heer , 61 5. Pteris pennaef orrnis Heer - ... 7 6. Lastrea (Goniopteris) Fischeri Heer? 10 7. Rhamnus Eridani Ung ..- --. US 8. Alnns Alaskana Newb _ 65 250 TERTIAUV U. S. GEOL. SURVEY OF THE TERRITORIES. PLATE XLVIII PLATE XLIX. 251 PLATE XLIX. Page. Figs. 1-3. Fraxinus integrifolia Newb _..._. 128 4. 7-9. [fig. 9 misprinted fig. 1 ] Populus polyniorpha Newb 50 5. Fraxinus affinis Newb . 1ST 6. Fraxinus denticulata Heer ? 128 252 U. S. GEOL. SURVEY OF THE TERRITORIES. TKRTIA1IY PLATE XLIX. PLATE L. 253 PLATE L . Page. PlG. 1. Platanus nobilis Newb . . _ 106 2. Rhamnus elegans Newb _. 117 254 U. S. GEOL. SURVEY OF THE TERRITORIES. TEIJTIAHY PLATE L. PLATE LI. 255 PLATE LI. Fig. 1. Ficus (?) Alaskana Newb _ _ ___ 84 3, in part. Vitis rotundif olia Newb ._ __ 120 2, in part. Juglans nigella Heer _. _. . 33 3, in part. Quercus Gronlandica Heer 75 3, in part. Taxodium distichuni miocenum Heer 22 4. Juglans nigella Heer _ _ 33 256 U. S. GEOL. SURVEY OF THE TERRITORIES. TERTIARY PLATE LI PLATE LII. 257 MON XXXV 17 PLATE L I I . Page. Fig. 1. Ficus (?) Alaskana Newb _ 84 2, 3 and 4 in part. Taxodium distichum miocentmi Heer 22 3 and 4 in part, 5. Prunus variabilis Newb 112 258 U S- GEOL. SURVEY OF THE TERRITORIES TERTIARY PLATE _LII '■• slaii & Son Oilri I PLATE LIII. 259 PLATE LIII. Figs. 1,2. Pterospermites dentatus Heer - 133 3. Vitis rotundifolia Newb 120 4. Sequoia spinosa Newb 21 5. Fruit of Sequoia spinosa Newb 22 6. Celtis parvifolia Newb .. .. . 84 260 US. GEOL. SURVEY OF THE TERRITORIES. TERTIARY PLATE LIII. T.Sincli: I . PLATE LIV. 261 PLATE LIV. Page. Figs. 1,2. Quercus Gronlandica Heer ... 75 3, in part. Carpinus grandis Ung _ 59 3, in part. Smilax cyclophylla Newb. 32 4. Pterospermites dentatus Heer 133 262 . ' KVEYOF THE TERRITORIES TERTIARY PLATE LIV " PLATE LV. 263 PLATE L V. Page. Figs. 1, 2. Ficus(?) Alaskana Newb _. _ 84 3, 4. Glyptostrobus Europaeus (Brong.) Heer _ 24 5, in part. Taxodiuui ocoidentale Newb __ 23 5, in part. Taxodmni distichum niiocenum Heer _ 22 6. Carpinus grandia Ung __ 59 264 "U.S. GEOL SURVEY OP THE TERRITORIES TERTIARY PLATE LV . T Sinclair * Son Luh Philada PLATE LVI 365 PLATE LVI. Page. Fig. 1. Ficus (?) Condoni Newb _ 85 2. Berberis simplex Newb 97 3. Platanus Haydenii Newb _. _ 103 4. Quercus castanopsis Newb _ 71 266 U.S. GEOL. SURVEY OF THE TERRITORIES. TERTIARY PLATE LVI T Sinclaii 8 Bon :,.*.. - PLATE LVII. 267 PLATE L V I I . Page. Fig. 1. Ficus (?) Condoni Newb 85 2. Viburnum cuneatuui Newb - - - - -• 130 3. Planera crenata Newb ._. - - 81 4. Fruit of Betula sp. ? Newb - 65 268 V.S GEOL SURVEY OF THE TERRITORIES TERTIARY PLATE LVII ! i Phuada PLATE LVIII. 269 PLATE L VIII. Page. Fig. 1. Ficus (?) Condoni Newb - - 85 2. Protoficus insequalis Newb - - - - - 89 3. Pianera longifolia Lesq --- -- 81 4. Populus polymorphs Newb... - -- 50 270 "U S GEOL SURVEY OF THE TERRITORIES TERTIARY PLATE LVIII T.SmclajrA Son. lath Phdada PLATE LIX. 271 PLATE L IX. Page. Fig. 1. Magnolia rotundifolia Newb .. 95 2. Ficus rnembranacea Newb - _ __._ 87 3. Platamis aspera Newb _ 102 4. Quercus laurifolia Newb 76 272 . . ! VEY OF THE TERRITORIES. TERTIARY' i : PLATE LX. 273 HON XXXV 18 PLATE L X , Page. Fig. 1. Protoficus intequalis Newb - 89 2. Quercus Sullyi Newb 79 3. Quercus laurifolia Newb_ _ - 76 4. Aristolocbia cordif olia Newb - 90 274 U i ' GBOL. SURVEY OF THE TERRITORIES. TERTIARY PLATE IiX . T. Sinclair * Sonlith PMlada PLATE LXI. 275 PLATE LXT. Page. Figs. 1,1a. Pteris Russellii Newb T 3-5. Acrostichum hesperium Newb 6 276 U.S. GEOLOGICAL SURVEY CRET.& TERT. FLORA PLATE LXI T. Sinclair St Son, LitK Philo. TERTIARY PLATE LXII. 277 PLATE LXII. Page. Figs. 1-4. Lygodiuin Kaulfussi Heer 1 5-6. Peeopteris (Cheilanthes) sepulta Newb 12 U.S. GEOLOGICAL SURVEY CRET.&TERT. FLORA PLATE LXII TERTIARY PLATE LXIII. PLATE LXIII. Page. Figs. 1-4. Anemia perplexa Hollick . - 3 5. Sabal grandifolia Newb _. 28 6. Sabal Powellii Newb ___ 30 280 U.S GEOLOGICAL SURVEY ;<'LORA PLATE LX1I1 T Sinclair St Son, LilK PKiU TERTIARY PLATE LXIV. 281 PLATE LXIV. Page. Fios. 1, la. Sabal Powellii Newb 30 2,2a. Sabal grandifolia Newb 28 3. Manicaria Haydenii Newb 31 282 U.S. GEOLOGICAL SURVEY CRET.&TERT.FLORA PLATE LXIV T. Sinclair St Son, Litri PkiU TERTIARY PLATE LXY. 283 PLATE L X V . Page. Fig. 1. Juglans occidentalis Newb -- 34 2. Salix angusta Al. Br.? - 54 3-5. Zizyphus longifolia Newb -- U9 6. Quercus castanoides Newb -- - ~0 7. Equisetuni Oregonense Newb -- --- --■ - - 1-1 8. Equisetuni Wyorningense Lesq - - 15 284 U S GEOLOGICAL SURVEY :RE T . & TERT .FLORA PLATE LXV T SmclaiT & Son, LitK Fhila TERTIARY PLATE LXVL 285 PLATE LXVI. Page. Figs. 1-4. Juglans occidentalis Newb 34 4a-4e. Fruit of Juglans occidentalis Newb _...._ _ 34 5-7. Planera variabilis Newb - - -- 83 286 U.S. GEOLOGICAL SURVEY CRET.&TERT.FLiORA PLATE LXVI .diT &Son. Lnh ?Ki1ol TERTIARY PLATE LXVII. 287 P L A T E LXVII. Page. Fig. 1. Aralia rnacrophylla Newb ... _._ 121 2, 3. Planera nervosa Newb . . . 82 i. Quercus gracilis Newb To 5, 6. Fious asarif olia minor Lesq 85 288 U S GEOLOGICAL SURVEY CRET.&TERT. FLORA PLATE LXVII T Sinclair * Son, Lirii PkiW TERTIARY PLATE LXVIII. 289 MON XXXV -19 PLATE L X V 1 1 1 . Page. Fig. 1. Aralia macrophylla Newb _ 131 2,3. Carpolithes spinosus Newb _ 138 ■Mi. Nordenskioldia borealis Heer 137 7. Brasenia (?) antiqua Newb 93 290 U.S. GEOLOGICAL SURVEY CRET.& TERT. FLORA PLATE LXVIII TERTIARY INDEX [Genera and all divisions of higher rank are printed in small capitals; synonyms and names of species to which incidental reference is made, in italics. Heavy-faced figures refer to pages on which descriptions are given. ] ABIETITES - cretaceaNewb., PI. XIV, fig. 5 Acer macrophyllum Pursh pseudo-Platanus L . sp.? Newb., PI. XL VI, fig. 8 ACERACEjE Acerites pristinus Newb __ _. ACROSTICHUM aureum L _- hesperium Newb., PI. LXI, figs. 2-5- Adenanthos cuneata Labill JE&culus Hippocastanum L Page. 18 IS 115 108 38 115 115 101 6 6 6 52 36 AlismaPlantagoL 137,138 Alnites - - 67 grandifoliaNewb., PI. IV, fig. 2 67 Mac Qxiarrii Forbes -.. ... 61 Alnus - 65 Alaskaaa Ne wb. , PI. XLVIII, fig. 8 65 cellulata. „ 65 Kieffersteinii Ung 66 nostratum Ung 66 serrata Newb., PI. XXXIII, fig. 11 66 serrulata Willd 66 serrulata f ossilis Newb., PI. XLVI, fig. 6 66 sp. ? Newb., PI. XLVI, fig. 7 67 Amelanchier Ill Canadensis Medic _ Ill similis Newb., PI. XL, fig. 6 Ill Anacardiace^e 114 Anemia 3 perplexa Hollick, PI. XV, figs.l.la; XVI, fig.3; LXIII, figs. 1-4 3 subcretacea (Sap. )Gard. & Ett 3,4,5,6 Angiosperm^; 27 Aralia 121 angustiloba Lesq 121.122 concreta Lesq 123 cuneata Lesq 122 grandifotia Sap. 121 Hercules (Ung.)Sap 121 jatrophcefotia H. B. & K 121 maerophyllaNewb.,Pl.LXVII, fig. 1; LXVIII, fig. i iai notata Lesq 108 nudicaulis L ._ 123 quinquepartitaLesq., PI. IX, fig. 1 122,123 racemosa L 123 rotundilobaNevrb 102 Aralia— Continued. Saportanea Lesq triloba Newb., PI. XL, figs. 4,5 tripartita Lesq Whitney i Lesq Araliace-e Araucaria spatulata Newb., PI. I, figs. 5, 5a.. Araucarites acutifolius Endl ._ crassifolius Endl Aristolocbia cordifolia Newb., PI. XXXIX; XL, fig. 7; LX, fig. 4 Sijrfio L'Her.. Aristolochiace^b _ ASPIDIUM Filix-antiqua Al. Br _ Kennerlyi Newb., PI. XVI, figs. 4, 5 Asplenium elongatum Swartz Foersteri Deb. and Ett.. subcretaceum Sap Berberidace^e __ Berberis Aquifolium Pursh _ Nepalensis Spreng repensLindl _ simplex Newb., PI. LVI, fig. 2 Berchemia volubilis _ Betula angustifolia Newb., PI. XLVI, fig. 5; XLVII, fig. 5 Blancheti Heer grandifotia Ett. heterodonta Newb., PI. XLIV, figs. 1-4; XLV, figs. 1-6. lenta Willd ■ macrophylla Heer nigra L _ ostrycefolia Sap prisca Ett Sezannensis Wat sp.? Newb., PI. LVII.fig. 4 Betulace^e _ Brasenia antiquaNewb.,PI. LXVIII, fig. 7 peltata Pursh Bumelia Marcouana Lesq Cabomba caroliniana A. Gray gracilis Newb., PI. XXII, fig. 1; XXIII, fig. 1.. 291 121, 122 123 122,123 121.122 121 17 17 17 17 90 90 90 90 11 12 11 3 6 3,4,5 97 97 97 97 97 97 119 63 63 64 65 64 64 64 64 64 64,65 64 65 59 93 93 93 1.36 91 91 91 292 INDEX. Cabomba— Continued. Page. grandis Newb. - 92 inermis i Newb. ) Holliek, PI. XXII, fig. 2; XXIII, fig. 2 - 93 Calycites --- 139 polysepala Newb., PI. XL, fig. 3.... 139 Caprifoliaces - 128 Cakpinus -- 5 9 grandis Ung., PI. LIV, fig. 3 in part; LV, fig. 6 59 Carpolithes - 13S lineatusNewb.,Pl.XL, fig. 1 -- 138 spinosus Newb. , PI. LX VIII, figs. 2,3.. 138 Carya 35 antiqnorum Newb., PI. XXXI, figs. 1-4 35 olivceformis Nutt . . -- 34,35 113 113 90 84 84 84 84 13 Cassia - -— sp.? Newb., PI. XLVI, fig. 10 Catalpa crassifolia'New'b Celtis australis L . occidentalis L ---- — parvifolia Newb., PI. LIII, fig. 6. Cheilanthes Laharpi i Heer Chrysodium Lanzeanum Gard ClNNAMOMUM - --- Buchii Heerii Lesq., PI. XVII, figs. 1-3 . lanceolatum (Ung.) Heer -- Scheuchzeri Heer Cistns ladaniferus L - Coccoloba diversifolia Jacq. pubescens L - uvifera L - Conifers - corn aces — CORNUS... --- acuminata Web alternifolia L Canadensis L florida L . 100 100 100 100 100 137 135 133 135 17 124 124 124 124 124 124 Newberryi Holliek, PI. XXXVII, figs. 2-4. 134 sen'ceaL -- - 124 Corylus - 60 Americana Walt 60 Americana fossilis Newb., PI. XXIX, figs. 8-10. 60 grandifolia Newb til MacQuarryi (Forbes) Heer, PI. XXXII, fig. 5; XLVIII, fig. 4 - -- 61,62,85 orbiculataNewb., PI. XXXII, fig. 4 61,62 rostrataAit - 60,63 63 112 112 112 112 112 112 112 133 1 135 10 33 132 138 180 14 U 16 rostrata fossilis Newb., PI. XXXII, figs. 1-3. . . Crataegus cequidentata Lesq ..- antiqua Heer - dyssenterica Mass.- - flava Soland- flavescens Newb. . PI. XLVIII, fig. 1 Warthana Heer - Credneria Lecontiana Lesq... --- Chyptogamia Cupania Americana L — - cycadace/e - Dicotyledons - of uncertain affinities Diospyros primavoa Heer - Dombeyopsis crenata Ung - equisetaces - - Equisetum - f//,o bn/osum Lesq - Equisetum— Continued. Page. Oregonense Newb., PI. LXV, fig. 7 14 procerum Heel* - - robustum Newb., PI. XVI, figs. 1,2.... sp. > Newb., PI. XXII, figs. 3, 4 Wyomingense Lesq., PI. LXV, fig. 8 Fag aces Fagus.- - cretacea Newb., PI. I, fig. 3. sylvatica L - FlCUS - - Alaskana Newb., PI. LI, fig. 1; LII, fig. 1; LV figs. 1,2 ---- asarifolia Ett asarif olia minor Lesq. , PI. LX VII, figs. 5, 6 ' Carica L Condoni Newb.. PI. LVI, fig. 1; LVII, fig. 1 LV1II, fig. 1 - elastica Roxb. laurophyllum Lesq membranaeea Newb., PI. LIX, fig. 2 obianceolata Lesq oppositifolia Willd planicostata Lesq. , PI. XLVI, fig. 1 planicostata Goldiana Lesq reticulata < Lesq. ) Holliek, PI. XII, figs. 2, 3. . rhomboideUs Lesq Rozburghii Wall scabriuscula Heer - Sycomoiiis L -- tilicefol ia Heer FlLICINS -- --- Filicites (?) Hebridicus Forbes Flabellaria eocenica Lesq Fraxinus.. arfinisNewb.,Pl. XLIX. fig. 5 Americana L dentata Heer - denticulata Heer, PI. XLIX, fig.6._ 127.138 excelsifolia Web 127 integrifolia Newb., PI. XLIX, figs. 1-3 138 praedicta Heer 127,128 Frenelites Eeichii Ett. 19 Qeonomites tenuirachls Lesq ._ .- 32 Gleichenia Haiitonensis (Wanklyn) 13 Glyptostrobus - - 24 Europseus (Brong.) Heer, PI. XXVI, figs. 6-8a; LV, figs. 3.4... 34 gracillimus Lesq 19 heterophtiUus Endl 24 CEningensis Al. Br - 24 peiirfuhisEndl 24 CfogertHeer - 24,60 Gramineje - 27 Grewia... - 120 crenata (Ung. ) Heer, PI. XLVI, fig. 2; XLVIII. figs. 2, 3 ISO Gymnogramina Gardneri Lesq 6 Haydenii Lesq 3,4 Gymnosperms 16 Hamamelidace.*: 100 Hymenophyllum cretaceum Lesq... 14 Iridaces 33 Iris 33 sp.? Newb., PI. XXII, fig. 6 33 JUGI.ANDACES 33 Juglans Si corrugata Ludw 36 Vebeyana Heer 42 15 15 16 6K 68 68 84 84 85 83' 85 89 88 87 87 86 88 89 88 43 86 86 36.89 85 1 10 30 127 137 127 128 INDEX. 293 Juglans— Continued. Page. laevigata Brong 36 lat i folia Heer.- 43 nigellaHeer, PI. LI, figs. Sin part. 4.. 33,85 nigra L ■ 36 occidentalis Newb., PI. LXV, fig. 1; LXVI, figs l-4c... 34 rhamnoides Lesq 135 Schimperi Lesq --- 35 Lastrea (Goniopteris) 10 Fischeri Heer, PI. XL VIII, fig. 6 10,11 Goldiana Lesq - - 11 intermedia Lesq 11 Knightiana Newb - 10 LAURACES 98 Laurophyllum reticulatum Lesq - 88 LaurusjjrimigeniaXJug - -- 58 Leguminos.-e _ 113 Leguminosites 113 Marconanus Heer, PI. V, fig. 3 113,137.136 Liquidambar -- -- - 100 Europajuin Al. Br., PI. XLVII, figs. 1-3. . lOO, 101. 103 integrifolius Lesq 101 obtusilobatus (Heer) Hollick, PI.- V, fig. 4; XII, fig. 4 lOl styraciflua L - 101,103 LlRIODENDRON 95 MeekiiHeer, PI. VI, figs. 5.6 95,96 primasvumNewb.,Pl. VI. fig. 7 95,96 Rrocaccinii Ung 96 Tulipifera L 96 Lygodtdm - 1 acutangulum Heer.. 3 Kaulfussii Heer, PI. LXII, figs. 1-4.... 1,3 neuropteroides Lesq 1 Magnolia 94 acuminata L 95 alternans Heer, PI. V, fig. 6 94 ellipticaNewb.,Pl. XII, fig. 1 94 Hilgardiana Lesq 94 Nordenskioidii Heer 95 obovataNewh - 94,95,135 rotundifolia Newb., PI. LIX, fig. 1 95 Manicaria 31 formosa Heer 33 Haydenii Newb., PI. LXIV, fig. 3 31 Monocotyledons _ _ 37 Monocotyledon of uncertain affinities 33 gen/ et sp. ? Hollick, Pl.XLVI,fig.9 33 Morace^e 84 Morns rubral^ 139 Myrica 37 trifoliata Newb., PI. XIV, fig. 3 37 Myricaceje 37 Negundo... 115 aceroides Monch - 115,116 Europceum Heer 115 triloba Newb., PI. XXXI, fig. 5 115 NlLSONIA _ 16 Gibbsii (Newb.) Hollick, PI. XV, figs.3, 3a.... 16 Johnstrupi Heer 16 Nordenskioldia 137 borealis Heer, PI. LXVIII, figs. 4-6 137 Nymphaia arctica Heer 137 Nymph.-eace.e 91 Nyssa 125 cuneata Newb., PI. XVII, figs. 4-6 135 mult i flora Wang 136 vetusta Newb., PI. I. fig. 2; IV, fig. 4 94, 1*5 Page. Oleaces _._ )27 Onoclea .... g sensibil'is L... PI. XXlll, fig. 4 9 sensibilis fossilis Newb., PI. XXIII, fig. 3: XXIV, figs. 1-5 s sensibilis obtusilobatus Torr., PI. XXIII, figs. 5,6 9 Palms _ __ _ 27 Pecoptehis (Chielanthes) _ 12 sepulta Newb., PI. LXII, figs. 5,5a, 6 12 Torellii Heer 1:; Phanerogamia 11; Phragmites _ 27 GEvfrigensis Heer 27 sp. T'Newb., Pi. XXII, figs. 5,5a 37 Phyllites ■_ 134 carneosus Newb., PI. XLI, figs. 1, 2 134,135,137 cupanioides Newb., PI. XLI, figs. 3,4 73,135,137 obcordatus Heer, PI. V, fig. 3 113,114,137,136 obtusilobatus Heer _ 101 rlmmboideus Lesq 13 Vanona? Heer, PI. Ill, fig. 8.. _ 136 venosus Newb., PI. XXX, fig. 4 1*5.136 81 Planer a. crenata Newb., PI. LVII, fig. 3. emarginata Heer -- SI 83 longifoliaLesq.,Pl. LVIII, fig. 3 SI. 83, 83 niicropliylla Newb., PI. XXXIII, figs. 3,4 SI nervosa Newb., PI. LXVII.figs. 3, 3 81,83 Ungeri Ett 81,83,83 variabilis Newb., PI. LXVI,figs.5-7 81.83 Zelkovcefolia Ung 83 Platanace.e 102 Platanus _ 102 aceroides Gopp.... :.... 1U4.105.109 aspera Newb.Pl.XLII, figs. 1-3; XLIV, fig. 5; LIX, fig.3... 10 3 basilobata Ward 87 grand if olio, Ung 105,108 Haydenii Newb., PI. XXXVI; XXXVIII; LVI, fig- 3 103,104,106,109,135 Hercules Ung 107, 121, 123 jatroplat'folia Ung _ 107 latiloba Newb., PI. I, fig. 4 105 nobilisNewb., PI. XXXIV; XXXVII, fig. 1; L, fig- 1 87,106,108,109,133 obtusiloba~Leso L 105 occidentalis 1..... 87,104.105,107,108,109,110 orientalislt _ 105,107 racemosa Nutt 107 Hayuoldsii Newb., PI. XXXV 109 recurvata Lesq 99 Populites -. 54 cyclophylla Heer 4] elegansLesq., PI. VIII, fig. 3... _ 54 salisburicefolia Lesq _ 98 Populus __ 37 acerifolia Newb., PI. XXVIII, figs. 5-8 37 *L 45,47,50 at It: n itata Al, Br 41 balsam if era L 44.45 balsonioides Gopp _ 45 cand icons Ait 44 cordata Newb., PL XXIX, fig. 6 38,39 cordif olia Newb. , PI. Ill, fig. 7 ; V, fig. 5 40 crenata Ung 4S cuneata Newb., PI. XXVIII. figs. 3-1; XXIX. fig. 7 41,51,53 294 INDEX. Populus— Continued. Page, cyclophylla Heer, PI. Ill, figs. 3, 4: IV, fig. 1 .. 41, 46 Debeyana Heer, PI. IV, fig. 3; V, fig. 7 42 elliptica Newb., PI. Ill.figs. 1,8- -,-- 43,46,53 flabellum Newb., PI. XX, fig. 4 44, 53 genetrixNewb., PI. XXVII, fig. 1- 44,45 heterophylla L 39 leucophylla Ung - - 38,51 litigiosaHeer.Pl. Ill, fig. 6... — - 41,45 micropbyllaNewb.,Pl. Ill, fig. 5 46 monolifera Ait *" mutabilis Heer - 41.51 mutabilis crenata Heer .. - 39 Nebrasceneis Newb., PI. XXVII, figs. 4, 5. .41, 47,48, 135 nervosa Newb., PI. XXVII, figs. 3, 3 41.48 nervosa elongata Newb. . PI. XXVIII, fig. 1 - - - 49 polymorpha Newb., PI. XLVI, figs. 3, 4; XLVII, fig. 4; XLIX, figs. 4, 7, 8, 9 [misprinted 1]; LVIII,fig.4 — — 50 pruinosa Scbrenk 53 rhoniboidea Lesq., PI. XX, figs. 1, 2 51 rotundifoliaNewb.,Pl. XXIX, figs. 1-t 43, 51 smilacifolia Newb., PI. XXIX, fig. 5 47,53 tremula L -- -- *•* tremuloidesMich.... - 43,47,52,54 Zaddachi Heer ---- 39,48 Protoficus 89 crenulata Sap - **9 insequalis Newb. , PI. LVI1I, fig. 2; LX, fig. 1. . 89 Protophyllum - 132 Lecontianum Lesq — - - 133 minus Lesq., PI. IX, fig. 3 132 multinerve Lesq. , PI. VII, fig. 4 132 Sternbergii Lesq., Pis. X, XI 133 Prunus.. - - - 112 Scottii Heer - -- 113 variabilis Newb., PI. LII, figs. 3 and 4 in part, 5 - 85,112 VirginicmaXi.. — - - H3 Psilotum inerme Newb 92 Pteridophyta - Pteris -- - - - - " erosa Lesq - - --- 8 penmeforinis Heer, PI. XLVIII, fig.5— . 7,8 pseudo-pennceformis Lesq 7,8 Bussellii Newb., PI. LXI, figs. 1, la.. 7 Pterospermites -- --- 133 alternans Heer... - --- 132,134 dentatus Heer, PI. LIII, figs. 1,2; L1V, fig. 4. 132. 133 integrifolius Heer. . . 132 apectabilisSeer - 132,134 Sternbergii Lesq. - 133 Pyrus -- HO eretacea Newb., PI. I, fig. 7. .. -- 110 Quercos -- -- 69 agrifoliaJSee - 79 antiquaNewb.,Pl. XIII, fig. 2 69 aspera Ung - -- -- 73 banksiief olia Newb. , PI. X VIII, figs. 2-5 69 Biidi/i.Web - -- "3 castanea Mubl - 74 castanoides Newb., PI. LXV, fig. 6 70 castanopsis Newb., PI. LVI, fig. 4 71 chlorophylla Ung 73 consimilisNewb.,Pl. XLIII, figs. 2-5, 7-10 71,78 coriacea Newb., PI. XIX, figs. 1-3; XX, fig. 5.. 73 Drymeja Ung - 70,72,75 dubia Newb., PI. XXXVII, fig. 5 73 Quercus— Continued. Page. etanaUng .. 73,74 elliptica Newb., PI. XVIII, fig. 1; XX,fig.3... 74 flexuosa Newb., PI. XIX. figs. 4-6 74 Gaudini Lesq __ 74 GmeleniTJng -- 74 gracilis Newb., PI. LXVII, fig. 4 75 Gronlandica Heer, PI. LI, fig. 3 in part; LIV, figs. 1,2 75,85 Haidingera Ett 69 Heeri Al. Br 74 ilicoides Heer 73 imbricaria Michx 73,78 lauritolia Newb., PI. LIX, fig. 4; LX, fig. 3.... 76 lonchitis Ung 70,73 Mediterranea Ung 69 Meriani Heer 77 nereifolia Al. Br 74 Nimrodis Ung 77 obtusiloba Michx _ 79 Olafseni Heer _ 71 paucidentata Newb., PI. XLIII, fig. 1 76 PhellosL, 70 salicifoliaNewb.;Pl. I, fig. 1 77 Saffordi Lesq 70 Sartor ii Liebm 70 simplex Newb., PI. XLIII, fig. 6 78 sinuata Newb., PI. XIII, fig. 1 78 Sullyi Newb., PI. LX, fig. 2 79 urophylla Ung -- 74 Xalapensis _ 70 rhamnace.-e 117 Rhamnites 118 concinnus Newb., PI. XXXIII, figs. 7 (8?) 118 Rhamnus 117 celtifolia Thunb 119 DecheniWeb 118 elegans Newb., PI. L, fig. 2 117 Eridani Ung., PI. XLVIII, fig. 7 118 Fi-angula L 68 Gaudini Heer 60 Rhus 114 copallina L 114 Meriani Heer 114 nervosa Newb., PI. XXXIII, figs. 5, 6 114 typhina L 114 Rosacea 110 Sabal 27 CampbelliNewb.,Pl. XXI, figs. 1,2. 27,28,29,30 grandifolia Newb., PI. XXV; LX11I, fig. 5; LXIV, figs. 2, 2a.. 28,29,31 imperialis Dn. , PI. XVI, figs. 6, 6a SO Lamanonis (Brong.) Heer — 28 major Ung 27,28 Powellii Newb., PI. LXIII, fig. 6; LXIV, figs. 1,1a... 30,31 sp. Newb 30 Sabalites Grayanus Lesq 29,31 Salicace^e 37 Salicites Hartigii Dunk 58 Salix.... 54 angustaAl.Br.,Pl. LXV, fig. 2 54 angustifolia Al. Br 54,57 cuneata Newb., PI. II, figs. 1, 2 55, 56 elongata Web --- 58 flexuosa Newb., PI. II, fig. 4; XIII, figs. 3, 4; XIV, fig. 1 - 56 foliosa Newb., PI. XIII, figs. 5,6 57 INDEX. 295 Salix— Continued. Page. Meekii Newb., PI. II, fig. 3 55,56,57,58 membranaceaNewb., PI. II, figs. 5-8a 56,57,59 Sapindace^e - 116 Sapindus 116 afflnis Newb., PI. XXX, fig. 1; XL, fig. 2.... 116,117 densifolius Heer 116 dubius Heer 116 falcifolius Heer.. 116 inembranaceus Newb., PI. XXX, figs. 2, 3 1 1 7 Sapotace.* 126 Sapotacites - 126 Haydenii Heer, PI. V, fig. 1 186 mimusops Heer ..' -- 126 Sassafras - 98 acutilobum Lesq - 98,99 cretaceum Newb., PI. VI, figs. 1-4; VII, figs. 1-3; VIII, figs. 1,2 98,99,122 cretaceum dentatum Lesq. 98 cretaceum obtusum Lesq 98 cretaceum recurvatum (Lesq.) Newb., PI. IX, fig. 2 -. 99 Harkerianum Lesq - 98,99 mirabile Lesq .,- 105, 106 Mudgii Lesq 98,99 obtusum Lesq 98,99 recwrvatus Lesq 99 subintegrifolium Lesq _ . 98, 99 Sequoia 18 cone.sp. ?,P1. XXVI,fig.9 19 Couttsice Heer. 19,22 cuneataNewb.,Pl. XIV, figs. 3-4a 18 gigantea (Lindl.) Gord 19 gracilliama (Lesq.) Newb., PI. XIV, fig. 6; XXVI, fig. 9? 19 HeeriiLesq.,Pl. XLVII, fig. 7 80 Langsdorfiii (Brong.) Heer 20,21 Nordenskioldii Heer, PI. XXVI, fig. 4 80,21 spinosa Newb., PI. LIII, figs. 4, 5 81 Smilace-j: 32 Smilax... 32 cyclophyllaNewb.,Pl. LIV, fig. 3 in part 353,60 orbicularis Heer 33 rotundifolia L _ 33 Sphenopteris 14 corrugata Newb., PI. I, fig. 6 14 elongatum Newb 3 Tceniopteris Gibbsii Newb... 16 Taxites Laugsdorfii Brong 20 Page. Taxodium 22 cuneatum Newb 18 distichum Rich 22,23 distichum miocenum Heer, PI. XLVII, fig. 6; LI, fig. 3 in part; LII, figs. 2, 3 and 4 in part; LV, fig. 5 in part 88,60,85 dubium Heer 23 Europwum Brong 24 occidentale Newb., PL XXVI, figs. 1-3; LV, fig. 5 in part 22,83 Thuites salicornoides Ung 26 Thu.ja 25 interrupts Newb., PI. XXVI, figs. 5-5d 85 Mengeauus Goepp. and Ber 2g occideutalis L. . 26,27 saviana Gaud 26 Tiliace.'E 120 Tilia Americana L 62 autiqua Newb 128 Europcea L 62 heterophylla Hort 129 Ulmace^e 80 Ulmus - 80 Americana L 81 Bronnii Ung - 80 fulvaMichx 80,81 pseudo- Americana Lesq - 80 speciosaNewb.,Pl. XL V, figs. 2-5, 7,8 SO Viburnum 128 antiquum Newb., PI. XXXIII, figs. 1, 2 138 asperum Newb., PI. XXXIII, fig. 9 118,139 cuneatum Newb., PI. LVII, fig. 2 130 dentatum L _ 130 erosum Thunb 131 lanceolatum Newb. , PI. XXXIII, fig. 10 131 odoratissimum Ker 131 tilioidesWard 128 VITACE.-E 120 VlTIS - -- ---. 120 arctica Heer '. - 120 Islandica Heer. 120 Labrusca L 120 OlriWRsev 120 rotundifolia Newb., PI. LI, fig. 2 in part; LIII, fig. 3 - 130 ZlZYPHUS - 119 cinnamomoides Lesq 120 longifolia Newb., PI. LXV, figs. 3-5 119 ^lDVERTISEMEISTT. [Monograph XXXV.] The statute approved March 3, 1879, establishing the United States Geological Survey, contains the following provisions: "The publications of the Geological Survey shall consist of the annual report of operations, geo- logical and economic maps illustrating the resources and classification of the lands, and reports upon general and ecouomic geology and paleontology. The annual report of operations of the Geological Survey shall accompany the annual report of the Secretary of the Interior. All special memoirs and reports of said Survey shall be issued in uniform quarto series if deemed necessary by the Director, but otherwise in ordinary octavos. Three thousand copies of each shall be published for scientific exchanges and for sale at the price of publication ; and all literary and cartographic materials received in exchange shall be the property of the United States and form a part of the library of the organization : And the money resulting from the sale of such publications shall be covered into the Treasury of the United States." Except iu those cases in which an extra number of any special memoir or report has been sup- plied to the Survey by special resolution of Congress or has been ordered by the Secretary of the Interior, this office has no copies for gratuitous distribution. ANNUAL REPORTS. I. First Annual Report of the United States Geological Survey, by Clarence King. 1880. 8°. 79 pp. 1 map. — A preliminary report describing plan of organization and publications. II. Second Annual Report of the United States Geological Survey, 1880-'81, by J W Powell 1882. 8 ,J . lv, 588 pp. 62 pi. 1 map. III. Third Annual Report of the United States Geological Survey, 1881-'82, by J. W Powell 1883. 8°. xviii, 564 pp. 67 pi. and maps. IV. Fourth Annual Report of the United States Geological Survey, 1882-'83, by J. W. Powell. 1884. S 1 -. xxxii, 473 pp. 85 pi. and maps. V. Fifth Annual Report of the United States Geological Survey, 1883-'84, by J. W. Powell. 1885. 8°. xxxvi, 469 pp. 58 pi. and maps. ■ VI. Sixth Annual Report of the United States Geological Survey, 1884-'85, by J. W. Powell. 1885. 8-'. xxix, 570 pp. 65 pi. and maps. VII. Seventh Annual Report of the United States Geological Survey, 1885-86, by J W Powell 1888. 8 C . xx, 656 pp. 71 pi. and maps. VIII. Eighth Annual Report of the United States Geological Survey, 1886-87, by J. W. Powell. 1889. 8°. 2 pt. xix, 474, xii pp., 53 pi. and maps; 1 prel. leaf, 475-1063 pp., 54-76 pi. and maps. IX. Ninth Annual Report of the United States Geological Survey, 1887-'88, by J. W Powell 1889. 8°. xm, 717 pp. 88 pi. and maps. X. Tenth Annual Report of the United States Geological Survey, 1888-89, by J. W. Powell 1890. 8°. 2 pt. xv, 774 pp., 98 pi. and maps; viii, 123 pp. XI. Eleventh Annual Report of the United States Geological Survey, 1889-'90, by J. W. Powell. 1891. 8°. 2 pt. xv, 757 pp., 66 pi. and maps; ix, 351 pp., 30 pi. and maps. XII. Twelfth Annual Report of the United States Geological Survey, 1890-'91, by J. W. Powell. 1891. 8°. 2 pt., xiii, 675 pp., 53 pi. and maps; xviii, 576 pp., 146 pi. and maps. XIII. Thirteenth Annual Report of the United States Geological Survey, 1891-'92, by J. W. Powell. 1893. 8°. 3 pt. vii, 240 pp., 2 maps; x, 372 pp., 105 pi. and maps; xi, 486 pp., 77 'pi. and maps. XIV. Fourteenth Annual Report of the United States Geological Survey, 1892-'93 by J W Powell. 1893. 8°. 2 pt. vi, 321 pp., 1 pi. ; xx, 597 pp., 74 pi. and maps. XV. Fifteenth Annual Report of the United States Geological Survey, 1893-'94, by J W Powell 1895. 8°. xiv, 755 pp., 48 pi. and maps. XVI. Sixteenth Annual Report of the United States Geological Survey, 1894-'95, Charles D Walcott, Director. 1895. (Part I, 1896.) 8°. 4 pt. xxii, 910 pp., 117 pi. and maps; xix, 598 pp.. 43 pi. and maps; xv, 646 pp., 23 pi. ; xix, 735 pp., 6 pi. XVII. Seventeenth Annual Report of the United States Geological Survey, 1895-96, Charles D. Walcott, Director. 1896. 8°. 3 pt. in 4 vol. xxii, 1076 pp., 67 pi. and maps ; xxv, 864 pp., 113 pi. and maps; xxiii, 542 pp., 8 pi. and maps; iii, 543-1058 pp., 9-13 pi. XVIII. Eighteenth Annual Report of the United States Geological Survev, 1896-97, Charles D Walcott, Director 1897. (Parts II and III, 1898.) 8°. 5 pt. in 6 vol. 1-140 pp., 4 pi. and maps; i-v, I IV ADVERTISEMENT. 29. On the Fresh- Water In vertebrates of the North American Jurassic, by Charles A. White. 1886. 8°. 41 pp. 4 pi. Price 5 cents. 30. Second Contribution to the Studies on the Cambrian Faunas of North America, by Charles Doolittle Walcott. 1886. 8°. 369 pp. 33 pi. 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Bibliography and Index of North American Geology, Paleontology, Petrology, and Miner- alogy for the Year 1894, by F. B. Weeks. 1896. 8°. 141pp. Price 15 cents. " 136. Volcanic Rocks of South Mountain, Pennsylvania, by Florence Bascom. 1896. 8°. 124 pp. 28 pi. Price 15 cents. ,„.,.....,, , „ , i TT 137. The Geology of the Fort Riley Military Reservation and Vicinity, Kansas, by Robert Hay. 1896. 8°. 35 pp. 8 pi. Price 5 cents. 138. Artesian-Well Prospects in the Atlantic Coastal Plain Region, by N. H. Darton. 1896. 8°. 228 pp. 19 pi. Price 20 cents. 139. Geology of the Castle Mountain Mining District, Montana, by W. H. Weed and L. V. Firs- son. 1896. 8°. 164 pp. 17 pi. Price 15 cents. ADVERTISEMENT. VII 140. Report of Progress of the Division of Hydrography for the Calendar Year 1895, by Frederick Haynes Newell, Hydrographer in Charge. 1896. 8°. 356 pp. Price 25 cents. 141. 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A Gazetteer of Kansas, by Henry Gannett. 1898. 8°. 246 pp. 6 pi. Price 20 cents. 155. Earthquakes in California in 1896 and 1897, by Charles D. Perrine, Assistant Astronomer in Charge of Earthquake Observations at the Lick Observatory. 1898. 8°. 47 pp. Price 5 cents. 156. Bibliography and Index of North American Geology, Paleontology, Petrology, and Miner- alogy for the Year 1897, by Fred Boughton Weeks. 1898. 8°. 130 pp. Price 15 cents. In preparation: 157. The Gneisses, Gabbro-Schists, and Associated Rocks of Southeastern Minnesota, by C. W. Hall. — The Geology of Eastern Berkshire County, Massachusetts, by B. K. Emerson. The Moraines of Southeastern Dakota and their Attendant Deposits, by J. E. Todd. WATER-SUPPLY AND IRRIGATION PAPERS. •By act of CongreSB approved June 11, 1896, the following provision was made : "Provided, That hereafter the reports of the Geological Survey in relation to the gauging of streams and to the methods of utilizing the water resources may be priuted in octavo form, not to exceed one hundred pages in length and rive thousand copies in number; one thousand copies of which shall be for the official use of the Geological Survey, one thousand five hundred copies shall be deliv- ered to the Senate, and two thousand five hundred copies shall be delivered to the House of Repre- sentatives, for distribution.'' Under this law the following papers have been issued: 1. Pumping Water for Irrigation, by Herbert M. Wilson. 1896. 8°. 57 pp. 9 pi. 2. Irrigation near Phoenix, Arizona, by Arthur P. Davis. 1897. 8°. 97 pp. 31 pi. 3. Sewage Irrigation, by George W. Rafter. 1897. 8°. 100 pp. 4 pi. 4. A Reconnoissance in Southeastern Washington, by Israel Cook Russell. 1897. 8°. 96 pp. 7 pi. 5. Irrigation Practice on the Great Plains, by Elias Branson Cowgill. 1897. 8°. 39 pp. 12 pi. 6. Underground Waters of Southwestern Kansas, by Erasmus Haworth. '1897. 8°. 65 pp. 12 pi. 7. Seepage Waters of Northern Utah, by Samuel Fortier. 1897. 8°. 50 pp. 3 pi. 8. Windmills for Irrigation, by Edward Charles Murphy. 1897. 8°. 49 pp. 8 pi. 9. Irrigation near Greeley, Colorado, by David Boyd. 1897. 8°. 90 pp. 21 pi. 10. Irrigation in Mesilla Valley, New Mexico, by F. C. Barker. 1898. 8°. 51 pp. 11 pi. 11. River Heights for 1896, by'Arthur P. Davis. 1897. 8°. 100 pp. 12. Water Resources of Southeastern Nebraska, by Nelson H. Darton. 1898. 8°. 55 pp. 21 pi. 13. Irrigation Systems in Texas, by William Ferguson Hutson. 1898. 8°. 67 pp. 10 pi. 14. New Tests of Certain Pumps and Water-Lifts used in Irrigation, by Ozni P. Hood. 1889. 8°. 91 pp. 1 pi. 15. Operations at River Stations, 1897, Part I. 1898. 8°. 100 pp. 16. Operations at River Stations, 1897, Part II. 1898. 8°. 101-200 pp. In press : 17. Irrigation near Bakersfield, California, by C. E. Grunsky. 1898. 8°. 96 pp. 16 pi. 18. Irrigation near Fresno, California, by C. E. Grunsky. 1898. 8°. 94 pp. 14 pi. VIII ADVERTISEMENT. In preparation: 19. Irrigation near Merced, California, by C. E. Grunsky. 20. Experiments with Windmills, by T. O. Perry. 21. Wells of Indiana, by Frank Leverett. 22. Sewage Irrigation, Part II, by George W. Rafter. 23. Water-Right Problems of Bighorn Mountains, by Elwood Mead. TOPOGRAPHIC MAP OF THE UNITED STATES. When, in 1882, the Geological Survey was directed by law to make a geologic map of the United States there was in existence no suitable topographic map to serve as a base for the geologic map. The preparation of such a topographic map was therefore immediately begun. About one-fifth of the area of the country, excluding Alaska, has now beeu thus mapped. The map is published in atlas sheets, each sheet representing a small quadrangular district, as explained under the following head- ing. The separate sheets are sold at 5 cents each when fewer than 100 copies are purchased, but when they are ordered in lots of 100 or more copies, whether of the same sheet or of different sheets, the price is 2 cents each. The mapped areas are widely scattered, nearly every State being represented. More than 800 sheets have been engraved and printed; they are tabulated by States in the Survey's "List of Publications," a pamphlet which may be had on application. The map sheets represent a great variety of topographic features, and with the aid of descriptive text they can be used to illustrate topographic forms. This has led to the projection of au educational series of topographic folios, for use wherever geography is taught in high schools, academies, and colleges. Of this series the first folio has been issued, viz: 1. Physiographic types, by Henry Gannett, 1898, folio, consisting of the following sheets and 4 pages of descriptive text: Fargo (N. Dak. -Minn.), a region in youth; Charleston (W.Va.),a region in maturity; Caldwell (Kans. ), a region in old age; Palmyra (Va.), a rejuvenated region; Mount Shasta, (Cal.), a young volcanic mountain; Eagle (Wis.), moraines; Sun Prairie (Wis.), drumlins; Donald- sonville (La.), river flood plains; Boothbay (Me.), a fiord coast; Atlantic City (N. J.), a barrier-beach coast. GEOLOGIC ATLAS OF THE UNITED STATES. The Geologic Atlas of the United States is the final form of publication of the topographic and geologic maps. The atlas is issued in parts, progressively as the surveys are extended, and is designed ultimately to co"3i the entire country. Under the plan adopted the entire area of the country is divided into small rectangular districts (designated ijitadrawjles), bounded by certain meridians and parallels. The unit of survey is also the unit of publication, and the maps and descriptions of each rectangular district are issued as a folio of the Geologic Atlas. Each folio contains topographic, geologic, economic, and structural maps, together with textual descriptions and explanations, and is designated by the name of a principal town or of a prominent natural feature within the district. Two forms of issue have been adopted, a "library edition" and a "field edition." In both the sheets are bound between heavy paper covers, but the library copies are permanently bound, while the sheets and covers of the field copies are only temporarily wired together. Under the law a copy of each folio is sent to certain public libraries and educational institu- tions. The remainder are sold at 25 cents each, except such as contain an unusual amount of matter, which are priced accordingly. Prepayment is obligatory The folios ready for distribution are listed below. No. Name of sheet. State. Livingston Ringgold Placerville Kingston Sacramento Chattanooga Pikes Peak (out of stock). Sewanee Anthracite-Crested Butte Harpers Ferry Jackson EstillviUe Fredericksburg Staunton Lassen Peak Knoxville Montana /Georgia \ Tennessee California Tennessee California Tennessee Colorado Tennessee Colorado (Virginia i West Virginia. [Maryland California {Virginia Kentucky Tennessee /Maryland (Virginia Virginia West Virginia. California (Tennessee \North Carolina Limiting meridians. 11(P-111° 85°-85° 30' 120° 30 -121° 84° 30'-85° 1210-121° 30' 85°-85° 30' 105°-105 3 30' 85° 30 '-86° 106° 45'-107° 15' 77° 30'-78° 120° 30' -121° 82° 30-83° 77°-77° 30' 790.790 30' 121°-122° 83° 30'-84° Limiting parallels. 45°-46° 34° 30'-35° 38° 30'-39° 35° 30'-36° 38° 30' -39° 35° -35° 30' 38° 30'-39° 35°-35° 30' 38° 45'-39° 39°-39° 30' 38°-38° 30' 36° 30'-37° 38°-38° 30' 38°-38° 30' 40°-41° 35° 30-36° Area, in square miles. 3,354 980 932 969 932 975 932 975 465 925 938 938 938 3,634 925 Price, in cents. 25 25 25 25 25 25 25 25 50 25 25 25 25 25 25 25 ADVERTISEMENT. IX No. Name of sheet. Marysvillo. . Smartsville . Stevenson . . Cleveland Pikeville .... MoMinnville Noitiini Three Forks. Loudon Pocahontas . . Morristown . . Piedmont. Nevada City /■Yellowstone t tional Park Pyramid Peak . Franklin Briceville Buekhannon. .. Gadsden Pueblo Downieville ... Truckeo Warthurg Sonora Nueces Bid well Bar . . . Tazewell [Nevada City -J Grass Valley iBanm-r Hill (Gallatin . Na J Canyon . . ] Shoshone (Lake State. California California {Alabama Georgia Tennessee Tennessee Tennessee Tennessee /Maryland \ Virginia Montana Tennessee Virginia West Virginia . . Tennessee (Virginia Maryland '} West Virginia.. ) (121° 00' California Jl21° 01' (120° 57' Wyoming ... Limiting meridians. California /Virginia I West Virginia . Tennessee West Virginia Alabama Colorado California California Tennessee California Texas California /Virginia \West Virginia. 121° 30'-122° 121°-121° 30' 85° 30'-86° 84° 30'-8o° 85°-85° 30' 85° 30'-86° 70° 30'-77° 111°-112° 84°-81° 30' Sl°-81° 30' 83°-83° 30' 79°-79° 30' 25"-121° 03' 45" 35"-121° 05' 01" 05"-121° 00'-25" 120°-120° 30' 79°-79° 30' 84°-84° 30' 80°-80° 30' 86°-86° 30' 104° 30'-105° 120° 30'-121° 120°-120° 30' 84° 30'-85° 120°-120° 30'' 100°-100° 30' 121°-121° 30' 81° 30'-82° Limiting parallels. 39°-39° 30' 39°-39° 30' 34° 30'-35° 35°-35° 30' 35° 30'-36° 35° 30'-36° 38°-38° 30' 45°-46° 35° 30'-36° 370.370 30/ 36°-36° 30' 39 1 13' 50"-39^ 17' 16'< 39° 10' 22"-39° 13' 50" 39° 13' 50"-39° 17' 16" 38° 30'-39° 36°-36° 30' 38° 30'-39° 34°-34° 30' 38°- 38° 30' 39° 30'-40° 39°-39° 30' 36°-36° 30' 37° 30'-38° 29° 30'-30° 39° 30'-40° 37°-37° 30' Area, in square miles. 925 925 969 938 3,354 969 951 * 903 11.65 12.09 11.65 932 932 980 938 919 925 963 944 1,035 918 950 Price, 25 25 25 25 25 25 25 50 25 25 25 25 50 25 25 25 50 25 25 25 25 25 25 STATISTICAL PAPERS. Mineral Resources of the United States [1882], by Albert Williams, jr. 1883. 8°. xvii 813 pp Price 50 cents. * ' Mineral Resources of the United States, 1883 and 1884, by Albert Williams, ir 1X85 8° xiv 1016 pp. Price 60 cents. Mineral Resources of the United States, 1885. Division of Mining Statistics and Technoloo-v 1886. 8°. vii, 576 pp. Price 40 cents. ° Mineral Resources of the United States, 1886, by David T. Day. 1887. 8°. viii, 813 pp Price 60 cents. Mineral Resources of the United States, 1887, by David T. Day. 1888. 8°. vii, 832 pp Price 50 cents. Mineral Resources of the United States, 1888, by David T. Day. 1890. 8°. vii 652 pp. Price 50 cents. Mineral Resources of the United States, 1889 and 1890, by David T. Day. 1892. 8° viii 671 pp Price 50 cents. Mineral Resources of the United States, 1891, by David T. Day. 1893. 8°. vii, 630 pp Price 50 cents. Mineral Resources of the United States, 1892, by David T. Day. 1893 8 C 50 cents. vii, 850 pp. Price Mineral Resources of the United States, 1893, by David T. Day. 1894. 8°. viii 810 pp Price 50 cents. ' On March 2, 1895, the following provision was included in an act of Congress : . "Provided, That hereafter the report of the mineral resources of the United States shall be issued as a part of the report of the Director of the Geological Survey." In compliance with this legislation the following reports have been published : Mineral Resources of the United States, 1894, David T. Day, Chief of Division. 1895. 8 J xv 646 pp., 23 pi. ; xix, 735 pp., 6 pi. Being Parts III and IV of the Sixteenth Annual Report. Mineral Resources of the United States, 1895, David T. Day, Chief of Division. 1896 8° xxm, 542 pp., 8 pi. and maps; iii, 543-1058 pp., 9-13 pi. Being Part III (in 2 vols.) of the Seventeenth Annual Report. Mineral Resources of the United States, 1896, David T. Day, Chief of Division. 1897. 8° xu, 642 pp., 1 pi. ; 643-1400 pp. Being Part V (in 2 vols.) of the Eighteenth Annual Report. MON XXXV 20 X ADVERTISEMENT. Mineral Resources of the United States, 1897, David T. Day, Chief of Division. Being Part VI (in 2 vols.) of the Nineteenth Annual Report. The money received from the sale of the Survey publications is deposited in the Treasury, and the Secretary of that Department declines to receive hank checks, drafts, or postage stamps ; all remit- tances, therefore, must be by money order, made payable to the Director of the United States Geological Survey, or in currency — the exact amount. Correspondence relating to the publications of the Survey should be addressed to The Director, United States Geological Survey, Washington, D. C, October, 1S9S. Washington, D. C. [Take this leaf out and paste the separated titles upon three of your cata- logue cards. The first aud second titles need no addition over the third write that subject under which you would place the book in your library.] LIBRARY CATALOGUE SLIPS. United States. Department of the interior. (U. S. geological survey.) Department of the interior | — | Monographs | of the | United States geological survey | Volume XXXV | [Seal of the depart- ment] | Washington | government printing office | 1898 Second title: United States geological survey | Charles D. Walcott, director | — | The | later extinct floras of North America | by | John Strong Newberry | A | posthumous work | edited by | Arthur Hollick | [Vignette] | Washington | government printing office | 1898 4°. xvii, 295 pp. 68 pi. Newberry (John Strong). United States geological survey | Charles D. Walcott, di- rector | — | The | later extinct floras of North America | by | John Strong Newberry | A | posthumous work | edited by | Arthur Hol- lick | [Vignette] | Washington | government printing office | 1898 4°. xvli, 295 pp. 68 pi. [United States. Department of the interior. (U. S. geological survey.) Monograph XXXV.] United States geological survey | Charles D. Walcott, di- rector | — | The | later extinct floras of North America | by | John Strong Newberry | A | posthumous work [ edited by | Arthur Hol- lick | [Vignette] | Washington | government printing office | 1898 4°. xvii, 295 pp. 68 pi. [United States. Department of the interior. (U. S. geological survey.) Monograph XXXV.] S" *3