Recent. Suppl. iv. 79 ; Bryol. Eur. t. 265. Trichostomum heter-
ostichum, Hedw. Musc. Frond, ii. 70, t. 25.
Hab. On rocks, Eocky Mountains {E. Hall); Oregon (Nevius);
Aiaska (Kellogg); Fort Coivilie (Lyall).
Plants variable in the length and thickness of the stems, sometimes
long and very slender, in the leaves, which are either without or with a
very short pellucid point, and in the capsule, which is sometimes very
small and pedicellate.
7. R. fa sc icu la re , Brid. 1. c. Stems long, prostrate, dirty
green or brownish; branches nodose, with fasciculate short
branchlets: leaves spreading, incurved or recurved, narrowly
lanceolate, linear from an ovate base, muticous at the apex :
calyptra papillose to near the base : capsule oval or oblong,
solid, on a thick pedicel ; lid subulate-acute, shorter than the
capsule, crenulate at base; teeth nearly regularly split their
whole length into two filiform nodose segments ; annulus large.
Bryol. Eur. t. 267. Ti'ichostomxim fasciculare, Schrad. Spicil.
El. Germ. 61 ; Schwaegr. Suppl. i. 155, t. 38.
Hab. On rocks, Aiieghany Mountains (Sullivant); foot of Mount
Marcy, New York; White Mountains; Alaska, etc.
8. R. v a rium . Very similar to the last, but differing in
its larger size, the leaves ovate-lanceolate, obtuse or the upper
with a short entire hair-point, the costa percurrent, basilar cells
of the borders few, oblong-rectangular, the lower long, confluent,
crenulate, the medial oblong with transverse walls more
distinct, the upper round-quadrate; perichætial leaves short,
broadly ovate, convolute : capsule long-pedicellate, shining, the
subulate lid nearly as long ; teeth very long, narrow. — Grimmia
ÇRhacomitrium) varia. Mitten, Journ. Linn. Soc. viii. 21.
Hab. Britisii Columbia (Lyall, Douglas) ; Observatory Inlet.
The author remarks that the leaves are intermediate between those of
B. fasciculare and B. canescens, wanting, however, the loosely areolate
auricles at the base of the latter, and that the moss needs further observation,
but can scarcely be considered as a form of B. fasciculare.
9. R. m ic ro c a rp um , Brid. 1. o. Plants smaller than in the
last, ramulose-nodose : leaves crowded, spreading and diversely
curved or falcate-secund, more enlarged at base, lanceolate
to a short diaphanous serrulate point ; cells of the whole
lamina linear, nodulose : capsule small, cylindrical-elliptical
or somewhat club-shaped, thin, soft, yellowish brown ; lid short-
beaked; annulus large, revoluble.—Bryol. Eur. t. 268. Trichostomum
microcarpum, Funck, 1. c.
Hab. Moist rocks in mountains; Aiieghany Mountains (Sullivant);
White Mountains (James); Oregon (Hall); Coeur d’Aiene Lake, Idaho
( Watson).
10. R. lan u g in o sum , Brid. Tufts very wide, thick, grayish
white ; plants long and slender, dichotomous and ramulose ;
lateral branches numerous : leaves very close, long, open, erect
or recurved and falcate-secund at the apex, narrowly costate,
narrowly lanceolate, bordered from the middle upward by a
pellucid ciliate-dentate papillose membrane, gradually passing
into a pellucid more or less deeply ciliate-dentate point ; cells of
the margin very small, punctiform, those of the lamina linear,
deeply crenulate : calyptra rough at the apex only : capsule
ohlong-ovate, solid, with a short rough pedicel; teeth long,
regularly bifid ; annulus very broad. — Muse. Recent. Suppl.
iv. 79 ; Bryol. Eur. t. 269. Trichostomum lanuginosum, Hedw.
Muse. Frond, iii. 3, t. 2. T. Canadense, Michx. FI. Bor.-Am.
ii. 296 ?
H ae. On granite rocks in mountains ; common.
11. R. can e sc e n s, Brid. 1. c. Plants in loose wide flat
yellowish green or whitish tufts ; stems erect, dichotomous ;
lateral branchlets short : leaves spreading, curved up or down,
often turned to one side, oblong at base, deeply carinate, with
borders reflexed from the base to the apex, lanceolate to a
pellucid crenulate point or blunt at the apex, papillose over the
whole surface : calyptra with a long subulate point, rough at
the apex only : capsule conical, narrow at the orifice, angular
when dry, coriaceous, on a long purple pedicel, which is flattened
and twisted to the left when dry ; lid acute or needle-shaped,
as long as the capsule, erect or oblique ; annulus and peristome
as in the last species. — Bryol. Eur. t. 270, 271. Trichostomum
canescens, Hedw. Muso. Frond, iii. 5, t. 3.
Var. ericoides, Bruch & Schimp. Lateral branches short,
obtuse, very numerous, aggregated, nodose : pellucid point of
the leaves short. —M. ericoides, Brid. 1. c. 78.
Var. lu te sc en s. Leaves longer, yellowish, pellucid, the
surface mostly smooth or indistinctly papillose ; borders of the
hyaline point denticulate (not rugose-papillose) : capsule scarcely
plicate, not angular when dry.
H ab. On rocks in mountain districts; the first variety on rocks in
arid places, Sitka (Bischoff), and Oregon (Hall); the second on shaded
rocks, California (Bolander).