Yale Peruvian expeditions, 1911-1915,
Publications no. 34.

"Igi'oe thffe Moots
I for. the founding of a. Cclleg? in iHis Colonf
•ifaLE^MViEiasi'inf-

1921

CONTRIBUTION PROM THE PERUVIAN EXPEDITIONS.! BR AR^
OF YALE UNIVERSITY AND THE NATIONAL
GEOGRAPHIC SOCIETY

PEKTJVIAN MOSSES

R. S. WILLIAMS

NEW YORK
1916

ffibrintatf-, wiihqit change of paging, from Bulletin of the Tokrbt Botanical Club
43: 323-334. pi. 17-80. June 29, 1916

[From ihe Bulletin of the Torrey Botanical Club, 43: 323-334,//. /7-20. 30 Je 1916.] '

Peruvian mosses
R. S. Williams
(with plates 17-20)
The following list is made up of two collections. The first,
obtained by Harry Ward Foote, on the Yale Peruvian Expedition
of 191 1, was kindly forwarded by Dr. A. W. Evans of Yale. It
consisted of forty-eight packets and contained thirty-seven species
among which appear to be two novelties, also two species known
before only from Patagonia. The specimens are from localities
varying from about 900 to 3,300 meters in altitude. They were
without number, and I have accordingly rearranged and numbered
them from 1 to 48.
The second collection consisted of forty-three packets, ob
tained by Messrs. Cook and Gilbert, with the exception of three
species by Hiram Bingham, while on the Yale University-National
Geographic Society Peruvian Expedition in 1915. In this second
collection four species are apparently new to science. I may
say that it was through the cooperation of the United States
Department of Agriculture that Messrs. Cook and Gilbert were
detailed to accompany this expedition and the specimens were
forwarded to me by Mr. William R. Maxon of the United States
National Museum. The altitude at which this second collection
was obtained varies from 1,800 to 4,100 meters, and there are
thirty-three species not in the first collection, making seventy
species in this list. The type specimens of the new species are
deposited in the herbarium of the New York Botanical Garden.
DlCEANUM MlTTENII C. Mull.
Above Arma Valley, July, 1915, H. Bingham 2063.
I have not been able to find any publication of this species
except that by Brotherus in Engler & Prantl's Nat. Pflanzenfam.
(1: 328), under subgenus 4. It is a plant of medium size with
the ovate leaf-base quickly narrowed tq^SKfong, subulate (and
serrulate point; the alar cells are numerous|m<^^afipwe|jif the
323

324 Williams: Peruvian mosses
broader part of the leaf narrow and elongate with pitted walls.
The collection is scanty and sterile.
Campylopus leucognodes (C. Mull.) Paris.
Lucumayo Valley, 3,600 m., June, 1915, Cook & Gilbert 1264a.
Fissidens asplenioides (Sw.) Hedw.
San Miguel, on rock, 1,820 m., September, 1911, Foote 1.
Fissidens crispus Mont.
Ollantaytambo, about 3,000 m., May, 1915, Cook & Gilbert 754.
Fissidens rigidulus Hook. f. & Wils.
Ollantaytambo, on rock, about 3,000 m., May, 1915, Cook &
Gilbert 670.
Trichostomum brachydontium Bruch.
Cuzco, on dry rock, about 3,500 m., July, 191 1, Foote 2;
these Cuzco specimens have leaves shorter and broader than in
typical specimens and possibly should not be referred here, but
they seem to be only a stunted form of the species; Lucma, on
dead wood, 2130 m., August, 191 1, Foote 15a.
Trichostomum semivaginatum Schimp.
Ollantaytambo, about 3,000 m., May, 1915, Cook & Gilbert
501a. Leptodontium integrifolium sp. nov.
Dioecious, the male plants about like the fertile, the flowers
with outer leaves similar to those of the stem, the inner broadly
oblong, rounded obtuse, scarcely one third the length of the
outer, costate, of mostly golden-brown, elongate, smooth cells
enclosing five or six antheridia and numerous, longer, filiform
paraphyses: fertile plants simple or slightly branched, the stems
3-4 cm. long with scattered, loose tufts of radicles and leaves,
when dry rather loosely imbricate and incurved-flexuous, when
moist spreading-recurved ; stem-leaves 3—3.5 mm. long, ovate-
lanceolate, the entire margins strongly recurved from a little
below the apex to near the base and papillose; costa stout, papillose
on the back, excurrent into a serrulate point sometimes 0.5 mm.
long; cells of the upper part of leaf rather obscure, scarcely elon
gate, 8-9 n in diameter, densely papillose on both sides, in the
lower fourth of leaf, elongate, narrowly rectangular, smooth,
except near the margin and costa; perichaetial leaves about 6 mm.
long, convolute, with a subulate, abruptly spreading, serrulate
point; fruit unknown. (Plate 17, figs. 1-7.)

Williams: Peruvian mosses 325
Ollantaytambo, ' about 3,000 m., May, 1915, Cook & Gilbert
704a. Growing with Thuidium peruvianum.
Globulina peruviana sp. nov.
Inflorescence unknown: plants in rather compact mats with
simple stems 1-4 mm. high, bearing radicles at the base and
imbricate-appressed leaves rather uniformly placed along the
stem or somewhat clustered at the apex and forming a globose
bud about 0.5 mm. in diameter; stem in cross-section about 200 fi
in diameter with cells of outer walls not differentiated and with a
distinct central strand; leaves rotundate or slightly oblong,
about 0.5 mm. long, more or less cucullate, the flat margins
crenulate half way down or more; costa vanishing abruptly a
little below the apex, rather weak in the lower part, widest near
the apex, slightly rough on the back and papillose on the inner
face, in cross-section showing two rows of medium-sized, thick-
walled cells on the dorsal side and a single row of much larger cells
on the ventral side; cells mostly gradually smaller from the base
to the apex of the leaf, more or less shortly rectangular below,
12-16 n by 16-30 n, toward the apex square to rhomboidal,
with sides 6-8 n long, finely papillose on both sides about the
upper half of the costa, the marginal cells smooth; fruit unknown.
(Plate 17, figs. 8-15.)
Araranca, south side of Roya Pass, about 4,100 m., April,
1915, Cook & Gilbert 177a.
Growing apparently on dry soil with Pogonatum polycarpum,
at the highest elevation given for any of the collections.
Barbula costata Mitt.
Ollantaytambo, about 3,000 m., May, 1915, Cook & Gilbert
610b. A small amount of what is apparently this species occurred, with
immature fruit, growing with Bryum argenteum. What appears
to be this also was found sterile, mixed with Leskea gracillima,
at the same locality by these collectors, 663a.
Barbula pruinosa (Mitt.) Jacq.
Cuzco, on dry rock, 3,500 m., July, 1911, Foote 3.
Barbula replicata Tayl.
Cuzco, on dry rock, 3,500 m., July, 191 1, Foote 4; Ollantay
tambo, about 3,000 m., on soil, May, 1915, Cook & Gilbert 610a.

326 Williams: Peruvian mosses
Mitten was correct, I believe, in thinking B. apiculata Hampe
not distinct from this species.
Barbula subulatula C. Mull.
Urubamba, on damp earth, 2,900 m., July, 191 1, Foote 5.
Tortula affinis Hampe.
Sicuani, Vilcanota Valley, on stone, about 3,600 m., April,
1915, Cook & Gilbert 157; Ollantaytambo, on rock, about 3,000
m., May, 1915, Cook & Gilbert 612; Urubamba, on rock, 2,900 m.,
July, 191 1, Foote 6.
Tortula bipedicellata Besch. and T. confusa Card., I believe, do
not differ from T. affinis, which in turn is very close to T. pichin-
chensis (Tayl.) Mitt., differing chiefly in having a low basal mem
brane of the peristome, the cell structure of which also varies.
In T. pichinchensis the cells are often as high as broad, and some
what rhomboidal in slightly oblique rows; in T. affinis the cells
are low, mostly two or three times broader than high.
Tortula andicola Mont.
Ollantaytambo, about 3,000 m., May, 1915, Cook Sf Gilbert 771.
Tortula lacerifolia sp. nov.
Dioecious : plants with stems (in this small collection scattered
through cushions of Fabronia andina) mostly simple, 6-8 mm.
high, with radicles at the base and leaves more or less aggregate
toward the apex; stem-leaves twisting incurved when dry, erect-
spreading when moist, oblong, mostly 2-2.5 mm- long, the margins
usually deeply incised in the upper half into readily separating,
narrow, irregular segments, often 0.25 mm. long and twisted part
way round or inflexed or reflexed, the margins of the lower leaf
being entire and recurved; costa golden-brown, stout, near the
base 80 ix wide, smooth on the back, more or less papillose on the
upper side, excurrent into a thorn-like spine, in cross-section
showing two large guide-cells, a large band of stereid cells on the
dorsal side, with two medium-sized cells on the ventral side; cells
throughout upper leaf rather obscure, mostly hexagonal, mamillose
and covered on both sides with small often C-shaped papillae,
those of lower leaf pale, with few or no papillae and mostly short-
rectangular, up to about 18 fi wide by 40-50/4 long; outer peri-
chaetial leaves like those of the stem, the inner small, pale, more
or less deeply cleft into numerous segments, the archegonia
numerous, with few paraphyses; fruit unknown. (Plate 18,
figs. 1-6.)

Williams: Peruvian mosses 327
Ollantaytambo, about 3,000 m., July, 191 1, Foote 7.
Grimmia micro-ovata C. Mull.
Temple of Viracocha near Tinta, on rock, about 3,500 m.,
April, 1915, Cook & Gilbert 206; Ollantaytambo, on rock, about
3,000 m., May, 1915, Cook & Gilbert 6og.
Grimmia ovata Web. & Mohr.
Cuzco, on dry rock, about 3,500 m., 191 1, Foote 8.
Grimmia rivulariopsis sp. nov.
Dioecious, the male plant rather more slender than the fertile
with often 2-3 flowers scattered along the stem; the inner peri-
gonial leaves small, ovate, ecostate, or faintly costate, enclosing
rather numerous, fusiform antheridia about 0.5 mm. long, without
paraphyses: fruiting-plants abundantly branching, 2-3 cm. high,
without radicles and bearing slightly secund leaves, erect-spreading
when moist, mostly somewhat incurved-appressed when dry;
stem-leaves oblong-ovate, about 2 mm. long, rather abruptly
narrowed to an acute, serrulate apex, the margins entire, of a
double thickness of cells and recurved from a little below the
apex to near the base; costa stout, percurrent, smooth on both
sides and flat or convex on the ventral side in the upper part;
cells of stem-leaves distinct, smooth, with slightly thickened,
scarcely or not sinuous walls, the median mostly 6 /j, wide by
6-8 n long, the basal more or less rectangular, 8 /j. wide by 16-22 n
long; perichaetial leaves larger than those of the stem, about
3.5 mm. long, the costa of the inner leaves rather faint below,
widest toward the apex, not quite percurrent, the cells of the
lower half of leaf narrowly rectangular or linear with slightly
thickened, straight walls; capsule ovate, immersed, about 1.5 mm.
high, without stomata, a band of five or six rows of small, trans
versely elongate cells about the rim, the median exothecal cells
scarcely or not elongate, rather irregular with scarcely thickened
or sinuous walls, up to 25 n in diameter; seta erect, scarcely one
half the capsule in height; peristome-teeth lanceolate, about 120 /J,
wide at the base and 400 n high, red, papillose, entire or often split
at the apex or along the median line and slightly lacunose ; annulus
none; lid convex, obliquely apiculate; calyptra little more than
covering the apiculus, the base cleft into several lobes. (Plate 19.)
Ollantaytambo, about 3,000 m., on rock in stream bed, May,
1915, Cook & Gilbert 753; and on rock, same place and collectors,
56i. Most closely related to G. amblyophylla C. Mull, of the South
American species, but the apex of the leaf is very different, the

328 Williams: Peruvian mosses
cells of the stem-leaves much smaller, with thinner, scarcely
sinuous walls and the inner perichaetial leaves have much longer,
narrower cells throughout the lower leaf.
Rhacomitrium crispipilum (Tayl.) Jacq.
Lucumayo Valley, 3,000 m., June, 1915, Cook &f Gilbert 1264.
Funaria calvescens Schwaegr.
Ollantaytambo, about 3,000 m., on wet soil, May, Cook &
Gilbert 669; Manchu Picchu, about 2,100 m., May, Cook & Gil
bert 996.
MlELICHHOFERIA ANDINA Sull.
Araranca, south side of La Roya Pass, about 4,100 m., on
earth wall, April, 1915, Cook & Gilbert 182a.
MlELICHHOFERIA bogotensis Hampe.
Ollantaytambo, about 3,000 m., May, 1915, Cook & Gilbert 705.
LEptobryum Wilsoni (Mitt.) Broth.
Arequipa, on wet rock, 2,300 m., June, 191 1, Foote 9.
Anomobryum filiforme (Dicks.) Husn.
Santa Rosa, on dry hillside, 3,960 m., July, 1911, Foote 10.
Bryum andicola Hook.
Above San Miguel, on rocks, 1,830 m., September, 1911,
Foote 11.
Bryum argenteum L.
Cuzco, on dry rock, 3,500 m., 1911, Foote 12; Ollantaytambo,
on soil, about 3,000 m., May, 1915, Cook & Gilbert 610.
Bryum biforme sp. nov.
Pseudoautoicous, the male plants minute, 1-2 mm. high,
attached by radicles to the tomentum of the fertile stems, each
plant bearing one or two flowers containing two or three antheridia,
with few, somewhat longer paraphyses; the outer antheridial
leaves broadly ovate-lanceolate, scarcely serrulate, with costa
vanishing well below the apex: fertile plants with more or less
branching, tomentose stems 3-4 cm. high, the short branches
often bearing at the apex abundant, filiform flagella, 3-4 mm.
long and covered with minute scale-like leaves; stem-leaves widely
spreading when moist, somewhat spreading-flexuous and twisted
when dry, serrulate above, rather broadly ovate, acute, slightly
decurrent, 3-3.5 mm. long, the margins flat above, recurved below
with a border of elongate, narrow, pale cells most distinct half

Williams: Peruvian mosses 329
way down the leaf where it becomes four or five cells wide ; costa
not quite percurrent, from a broad, reddish brown base, tapering
gradually to the slender apex; cells in upper leaf rhomboidal or
hexagonal, in lower leaf larger and more or less rectangular, all
with somewhat thickened walls distinctly pitted, at least in the
lower leaf; the median cells about 16/4 wide and 40-50 ix long;
outer perichaetial leaves about the length of the stem-leaves,
from a broad base, oblong, acute, serrulate and with costa van
ishing a little below the apex; seta about 2 cm. long; capsule
pendent with sporangium rather narrowly ovate and tapering
into a neck about one half the length of the sporangium, the median
exothecal cells irregularly elongate with evenly thickened, mostly
slightly curving walls, the stomata abundant in the neck, about
40 n long; annulus large; peristome- teeth lanceolate, about 100 p
wide at the base and 600 > high, with hyaline borders and the
outer plates finely punctate, mostly one and one half to two
times wider than high, the inner lamellae without cross- walls;
inner segments about the height of the teeth, keeled and solid
along the median line, very slender-pointed with mostly two long,
slender cilia between them, sometimes distinctly appendiculate ;
spores rough, up to 20 fi in diameter; lid highly convex-apiculate.
(Plate 20.)
Torontoy, Urubamba Valley, about 3,600 m., May, 1915,
Hiram Bingham 730.
This is, I believe, the only Bryum known having inflorescence
as above described ; the flagella also are unusual.
Bryum densifolium Brid.
Urubamba, on damp earth, 2,900 m., July, 191 1, Foote 13;
Santa Anna, 912 m., August, 191 1, Foote 14.
Mnium ligulatum C. Mull.
Lucma, on dead wood, 2,130 m., Aug. 1911, Foote 15, growing
mixed with Cyclodictyon aeruginosum (Mitt.) Broth, and Tricho
stomum brachydontium Bruch.; Urubamba, on wet earth, 2,900 m.,
July, 191 1, Foote 16.
Anacolia subsessilis (Tayl.) Broth.
Urubamba, on loose earth and rocks, 2,900 m., July, 1911,
Foote 17; Ollantaytambo, about 3,000 m., Cook & Gilbert, May,
1915, 504, 749, 771a.
Breutelia bryocarpa Herzog.
Lucumayo Valley, 1,800-3,600 m., June, 1915, Cook & Gilbert,
1320a.

330 Williams: Peruvian mosses
A few stems with one capsule were found mixed in with
Breutelia tomentosa. This is evidently the same species as that
collected by Weddell in Peru and named, apparently in manu
script only, Bartramia nutans by Montagne. It is also the same
as my Bolivian collection, No. 2825, referred to Breutelia nutans
(Mont.).
Breutelia tomentosa (Sw.) Schimp.
San Miguel, Urubamba Valley, about 1,800 m., May, 1915,
Cook &f Gilbert 988; Lucumayo Valley, 1,800-3,600 m., June,
1915, Cook & Gilbert 1320.
Pogonatum campylocarpum C. Mull.
Lucumayo Valley, 1,800-3,600 m., June, 1915, Cook & Gil
bert 1322.
Pogonatum polycarpum (Schimp.) Broth.
Araranca, south side of La Roya Pass, about 4,100 m., April,
191 5, Cook & Gilbert 177 and 182.
Polytrichum antillarum Rich.
Torontoy, Urubamba Valley, about 2,400 m., June, 1915,
Cook & Gilbert 1194; Lucumayo Valley, 1,800-3,600 m., on wet
earth, June, 1915, Cook &¦ Gilbert 1318.
Hedwigia albicans (Web.) Lindb.
Temple of Viracocha, near Tinta, about 3,500 m., April, 1915,
Cook & Gilbert 204; Ollantaytambo, about 3,000 m., May, 1915,
Cook & Gilbert 501.
Hedwigidium imberbe (Sm.) B.S.G.
Urubamba, on rocks, 2,900 m., July, 191 1, Foote 18; Ollantay
tambo, 2,750 m., July, 1911, Foote 19; Temple of Viracocha, near
Tinta, about 3,500 m., April, 1915, Cook & Gilbert 204a.
Braunia canescens Schimp.
Near Calca, on rock, April, 1915, Cook & Gilbert 245; Ollan
taytambo, about 3,000 m., April and May, 1915, Cook & Gilbert
473, 502, and 503. This species has been considered scarcely
distinct from B. cirrifolia (Wils.) Jaeg., but it seems to me to be a
rather smaller species with more closely imbricate leaves. The
leaves also, below the apex of the stem, are broader in the upper
part, often slightly obovate, and more abruptly narrowed to the
pale apex of blade and hair point. B. cirrifolia has leaves rather

Williams: Peruvian mosses 331
lanceolate and gradually narrowed to a yellowish apex and
flexuous hair point. Braunia argentinica C. Miill. and B. cirri-
olia var. falcatula Herzog belong, I should say, under B. canescens.
Prionodon bolivianus C. Miill.
Torontoy, Urubamba Valley, about 3,600 m., May, 1915,
Hiram Bingham 729.
Squamidium rotundifolium (Mitt.) Broth.
Above San Miguel, 1,830 m., September, 191 1, Foote 20.
Pilotrichella viridis (C. Miill.) Jacq.
San Miguel, Urubamba Valley, 1,800 m., May, 1915, Cook &
Gilbert 919.
Papillaria imponderosa (Tayl.) Broth.
Above San Miguel, on moist earth, 1,830 m., September, 191 1,
Foote 21.
Meteoriopsis remotifolia (Hornsch.) Broth.
San Miguel, 1,500-1,830 m., July, 191 1, Foote 22.
Neckera eucarpa Schimp.
Urubamba, on bark, 2,900 m., July, 191 1, Foote 23; Ollan
taytambo, about 3,000 m., May, 1915, Cook & Gilbert 763.
Neckera Jamesoni Tayl.
Ollantaytambo, about 3,000 m., on Alnus, May, 1915, Cook
& Gilbert 763a.
Neckera Lindigii Hampe.
Lucma, on dead wood, 2,130 m., August, 1911, Foote 24;
Urubamba, on bark, with N. eucarpa, 2,900 m., July, 1911,
Foote 23a.
Porotrichum valdiviae C. Miill.
Ollantaytambo, about 3,000 m., on trunks, May, 1915, Cook
& Gilbert 762a; apparently the farthest northern station for this
species. Entodon platygyrioides C. Mull.
Above San Miguel, on rock, 1,830 m., September, 191 1, Foote
25- Erythrodontium squarrosum (C. Miill.) Par.
Santa Ana, on rock, 912 m., August, 191 1, Foote 26.

332 Williams: Peruvian mosses
Fabronia andina Mitt.
Ollantaytambo, on rock, about 3,000 m., May, 1915, Cook &
Gilbert 662; Urubamba, 2,900 m., July, 1911, Foote 27; Ollantay
tambo, 2,750 m., July, 1911, Foote 28.
Fabronia polycarpa Hook.
Santa Ana, 912 m., August, 191 1, Foote 29.
Cyclodictyon aeruginosum (Mitt.) Broth.
Lucma, on dead wood, 2,130 m., August, 1911, Foote 30.
Rhacopilum tomentosum (Hedw.) Mitt.
Santa Ana, on dead wood, 912 m., August, 1911, Foote 31, 32;
San Miguel, 1,525 m., September, 1911, Foote 33.
Leskea gracillima Tayl.
Urubamba, 2,900 m., July, 191 1, Foote 34, on bark, 35 on rock;
Ollantaytambo, on rock, about 3,000 m., May, 1915, Cook & Gil
bert 609a, 663.
Thuidium peruvianum Mitt.
Ollantaytambo, about 3,000 m., May, 1915, Cook & Gilbert
704, 748.
Hygroamblystegium irriguum (Wils.) Loeske.
Urubamba, on rock, 2,900 m., July, 1911, Foote 36. Appar
ently not before reported for South America. The next nearest
known location is, I believe, Guatemala.
Drepanocladus longifolius (Wils.) comb. nov.
Amblystegium longifolium Wils.; Mitten; Jour. Linn. Soc. Bot.
12: 571. 1869.
Temple of Viracocha, near Tinta, about 3,500 m., in a spring,
April, 1915, Cook & Gilbert 216.
These sterile specimens seem to belong under this species
although only known from Patagonia up to the present time.
Hygrohypnum peruviense sp. nov.
Inflorescence unknown : growing in loose mats with irregularly
branching stems without radicles, 2-3 cm. long and about 200 11
in diameter, in cross-section showing a distinct central strand
and outer walls of about three rows of smaller, thick-walled cells;
leaves loosely erect-spreading, more or less secund, rather broadly
ovate-acute, somewhat cymbiform, 1.5-2 mm. long, and nearly
or quite entire ; costa stout, 80 ix wide or more at the base, simple

Williams: Peruvian mosses 333
and extending about three fourths up the leaf or shorter and
dividing into two to five branches; leaf-cells all elongate, prosen-
chymatose and mostly slightly sinuous, with rather thin walls,
the median 5-6 fi wide and 40-60 fi long, the alar usually forming a
distinct cluster of broad, short cells either greenish or finally
reddish-brown; fruit not found. (Plate 18, figs. 7-12.)
A variety evidently of the above, growing in flowing water,
has elongate, hispid, wiry stems, 10-15 cm- long, without leaves
below and in habit like H. Bestii, except much more slender.
Cuzco, on wet rock, 3,500 m., July, 191 1, Foote 37 (type);
Ollantaytambo, about 3,000 m., on rock under spring, May, 1915,
Cook fif Gilbert 666 (the variety) .
Ctenidium malacodEs Mitt.
Ollantaytambo, about 3,000 m., on trunks, May, 1915, Cook &
Gilbert 762b.
Mittenothamnium andicola (Hook.) Card.
Ollantaytambo, about 3,000 m., on trunks, May, 1915, Cook &
Gilbert 762.
Mittenothamnium oxystegum (Spruce) Card.
Santa Ana, on rock, 912 m., August, 1911, Foote 38.
Hypnum Schreberi Willd.
Ollantaytambo, about 3,000 m., May, 1915, Cook & Gilbert
748a. Ectropothecium aeruginosum (C. Miill.) Mitt.
Santa Ana, 912 m., on dead wood, August, 191 1, Foote 39.
Palamocladium leskeoides (Hook.) E. G. Britton.
San Miguel, on rock, 1,830 m., September, 1911, Foote 40.
Brachythecium asperulum (Hampe) Jaeg.
Ollantaytambo, about 3,000 m., May, 1915, Cook & Gilbert
7530- Brachythecium flaccum C. Miill.
Huadquinia, on wet earth, 1,530 m., August, 191 1, Foote 41;
Ollantaytambo, about 3,000 m., on trunks, May, 1915, Cook &
Gilbert 762c.
Brachythecium sericeovirens (C. Mtill.) Par.
Ollantaytambo, on rock, 2,750 m., July, 1911, Foote 42. Known
previously only from Patagonia.

334 Williams: Peruvian mosses
Brachythecium stErEopoma (Spruce) Jaeg. '
San Miguel, on live wood, 1,830 m., July, 1911, Foote 48.
Rhynchostegium aquaticum (Hampe) Jaeg.
Urubamba, in water, 2,900 m., July, 191 1, Foote 43; Arequipa,
in water, June, 191 1, Foote 44; Cuzco, on wet rocks, July, 191 1,
Foote 45.
Rhynchostegium conophyllum (Tayl.) Jaeg.
Urubamba, on rock, 2,900 m., July, 1911, Foote 46; San Miguel,
on live wood, 1,830 m., July, 191 1, Foote 47.
New York Botanical Garden
Explanation of plates 17-20
Plate 17
Leplodontium integrifolium. i. Plant about natural size. 2. Perichaetium,
X 7- 3- Stem-leaf, X 15. 4. One side of base of leaf, X 115. 5. Median cells
of leaf, X 240. 6. Apex of leaf, X SO. 7. Cross-section of leaf, X 150.
Globulina peruviana. 8. Plant about natural size. 9. Plant, X 10. 10. Stem-
leaf, X 45. n. Apex of costa and leaf, X 230. 12. Median cells of leaf, X 230.
13. Basal cells on one side of costa, X 230. 14. Cross-section of stem, X 230.
15. Cross-section of leaf, X 230. Plate 18
Tortula lacerifolia. 1. Plant about natural size. 2. Perichaetial leaf, X 25.
3. Upper stem-leaf, X 25. 4. A segment from the leaf-margin, X 130. 5. Base
of leaf on one side of costa, X 180. 6. Cross-section of leaf, X 180.
Hygrohypnum peruviense. 7. Plant about natural size. 8. Cross-section of
stem, X 130. 9. Basal leaf-cells on one .side of costa, X 270. 10, n. Stem-leaves,
X 25. 12. Median leaf-cells, X 270. Plate 19
Grimmia rivulariopsis. i. Fertile and male plant about natural size. 2. Cap
sule, seta and perichaetial leaf, X 20. 3. Calyptra, X 20. 4. Lid, X 20. 5. Part
of peristome and rim of capsule, X no. 6. Antheridia with leaf, X 20. 7. Upper
part of stem leaf, X 180. 8. Stem-leaf, X 18. 9. Median cells of leaf, X 180.
10. Cells in lower part of perichaetial leaf, X 180. n. Perichaetial leaf, X 18.
12. Median exothecal cells, X 180. 13. Cross-section of stem-leaf, X 180.
Plate 20
Bryum biforme. 1. Fertile and male plant about natural size. 2. Male
plants, X 20. 3. Capsule, moistened, X 8. 4. Upper stem-leaf, X 16. 5. Outer
perichaetial leaf, X 16. 6. Upper part of stem-leaf, X 135. 7- Border of leaf and
adjoining cells about half way down, X 135. 8. Inner perichaetial leaf, X 16.
9. Stoma, X 135. 10. Median exothecal cells, X 135. n. Part of peristome,
annulus and rim of capsule, X 100.

Bull. Torrey Clue

Volume 43 plate 17

1-7. LEPTODONTIUM INTEGRIFOLIUM R. S. Williams
8-15. GLOBULINA PERUVIANA R. S. Williams

Bull. Torrey Club

Volume 43, plate 18

1-6. TORTULA LACERIFOLIA R. S. Williams
7-12. HYGROHYPNUM PERUVIENSE R. S. Williams

Bull. Torrey Club

Volume 43, plate 19

GRIMMIA RIVULARIOPSIS R. S. Williams

Bull. Torrey Club

Volume 43, plate 20

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BRYUM BIFORME R. S. William

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