9. D. o b tu s ifo liu s , Schimp. Monoecious : plants 1 c.m.
long, subcespitose : leaves crowded, soft, erect, spreading from
the” middle, lingulate-lanceolate, acuminate or obtuse, very
entire, hyaline up to three-fourths of their length, densely
chloropliyllose above, minutely papillose on the back, the lower
smaller, obtuse or blunt-pointed, yellowish hyaline nearly the
whole length ; male flowers gemmaceous : calyptra tawny : hd
short-beaked ; teeth free, slightly twisted to the left ; annulus
large, compound, revoluble. - Syn. 158. Tortula obtusifoha,
Schleich. ; Lindb. Trichost. 236. Barbula obtusifolia, Schwaegr.
Snppl. i. 129, t. 31. Desmatodon Jlavicans, Bruch & Schimp.
Bryol. Eur. t. 183. ^ •
H a e . ■ Rocky Mountains (Drummond); on th e ground, California
(Bolander); Echo Canon, Wasatch Mountains (ll-aisoji); Janesville,
Wisconsin (Lapham).
Very variable in the size of the plants and of the leaves, which are also
more or less obtuse or even distinctly acuminate.
10. D. G u e p in i, Bruch & Schimp. Inflorescence and mode
of growth as in the preceding: lower leaves ovate-lanceolate,
the upper oval-oblong, awned by the excurrent costa, with the
borders recurved, distinctly papillose on the back: capsule
oblong, subcylindrical ; lid large, conical, short-beaked ; teeth
free to the base, very papillose, reddish, erect -when dry, half-
convolute when moist; annulus narrow, simple.— Bryol. Eur.
t. 183. Barbula Guepini, Schimp. Syn. (ed. 2), 197. Trichostomum
Guepini, Muell. Syn. i. 590.
H a b . With the last, California (Bolander).
* * Capsule curved or pendent.
11. D. c e rn u ilS , Bruch & Schimp. Plants short, loosely
cespitóse’: leaves closely imbricate, the lower small-ovate, the
upper spatulate-lanoeolate, obscurely serrate or crenulate above,
papillose, mucronate by the excurrent costa : capsule cernuous,
broadly ovate, solid, brown, on a long reddish pedicel; lid
short-rostellate; teeth cut into two or three filiform segments,
either free or partly coherent ; annulus compound, persistent. - -
Bryol. Eur. t. 134. Didymodon latifolius, Wahl. FI. Lap. 313,
t 20. Trichostomum cernuum, Lindb. Trichost. 225.
H A B Rocky Mountains of British America, in fissures of wet rocks
( Drummond) ; Ruby Valley, Nevada ( Watson) ; Edmonton Eiver, Canada,
etc. (Macoun). The species has not been found, however, in Colorado
nor in California.
12. D. obliquus, Bruch & Schimp. Stems short : leaves
ovate-oblong or ovate-lanceolate, awned or cuspidate by the excnrrent
costa, revoluble on the borders, closely papillose and
chlorophyllose in the upper part, the double papillæ distinctly
prominent on the borders : capsule cylindrical, oblique : teeth
reddish and bifid to near the base, twisting to the left ; annulus
simple. Bryol. Eur. t. 136. T o r tu la suberecta, Hook. &
Wils. in Drumm. Muso. Amer. n. 146. T r i ch o s tomum obli-
quimi, Muell. Syn. i. 594.
H a b . Shady alpine localities; Rocky Mountains (Drummond).
13. D. L au re ri, Bruch & Schimp. Plants soft, in small
compact green tufts intermixed with radicles, yellowish
below : leaves close, imbricate, spreading, soft, ovate-oblong,
the upper longer, apiculate, bordered by a narrow yellowish
loosely areolate revolute margin, reddish at base, hyaline upward
to the middle, papillose on both faces : capsule pendent
from the arcuate pedicel, oblong ; lid small, with a short blunt
beak ; teeth purple, slightly twisted, attached to a broad dark
red membrane ; annulus double, each series detaching separately.
Bryol. Eur. t. 135. Tr ich o s tomum L a u r e r i , Schultz,
Regensb. Flora, x. 161. T o r tu la L a u r e r i , Lindb. Trichost. 243.
H a b . Snow Range of the Rocky Mountains, upon the ground (Drummond);
Colorado (Downie, Bothrock, Wolf).
4 4 . BARBULA, Hedwig. (PL 1.)
Mode of growth, habit, and form and reticulation of the leaves
as in Tr ich o s tomum. Peristome of 16 teeth, divided into 32
long filiform segments, twisted to the left, attached to a more or
less elongated tubuliform tessellate membrane.
§ 1. A l o i d e l læ . — P fo n f e v e r y small, g rega r iou s , a n n u a l ;
leaves r ig id , in cu r v e d above ; cos ta thickened a n d d i la ted
towai'd the apex, a n d covered w i th ar t iculate f l a m e n t s ;
has i la r membrane o f the p e r i s tom e short.
1. B. b re v iro s tris , Bruch & Schimp. Bisexual: plants
very small, gemmiforrn : lower leaves round-ovate, the upper
broadly oblong, obtuse; teeth making a single turn; annulus
broad, revoluble. — Bryol. Eur. t. 138. T o r tu la breviros tris,
Hook. & Grev. ; Lindb. Trichost. 233.
H a b . Rocky Mountains (Drummond) ; British Columbia (Macoun).
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