I 1 ii
t
ii. 319. Brack,ythecmm plumosum, Bruch & Schimp. Bryol.
Eur. t. 537.
Var. homomallum. Small; branches falcate: leaves
secund, narrower: capsule small, ovate. — Bruch & Schimp.
1. c., as Brachythecium.
H a b . Moist rocks in mountains, and borders of waterfalls; South and
North; common aud variable.
More robust than the last, with broader and shorter-acuminate leaves,
dirty yellow; capsule longer; habitat subaquatio.
SuBGENus IX. SOLEROPODIUM.
Habit and mode of growth of Brachythecium. Areolation
still narrower vermicular, much enlarged and hyaline at the de-
current base. Flowers dioecious. Capsule suberect or cernuous,
oblong-cyliiidrical or ovate, more or less incurved. Pedicel
rough. 1 eeth of the peristome lamellate on the inside ; segments
split on the keel ; cilia two or three, as long as the
segments, appendiculate. Annulus double. — Scleropodium,
Schimp.
59. H. cæ sp ito sum , Wils. Densely cespitose, the tnfts
bright or dirty green, soft; stems rooting, densely ramulose;
branchlets erect or incurved: leaves soft, open or subsecund,
loosely imbricate when dry, ovate-lanoeolate, acuminate, those
of the branches ohlong-lanceolate, acute or blunt at the apex,
all concave, minutely serrulate all around, costate to above the
middle, the costa sometimes forking : capsule suberect, oblong-
subcylindrical, slightly incurved ; operculum convex, rostellate.
— Engl. Bot. Suppl. t. 2878, and Bryol. Brit. 344, t. 55.
Scleropodium ccespitosum, Bruch & Scliimp. Bryol. Eur. t. 656.
H a b . On the ground, and upon shaded rocks among redwoods, California
{Bolander); Alaska {Kellogg); not common.
60. H. Oalifornicum, Lesq. Differing evidently from the
last in its loosely intricate tufts and slender stems with long
filiform branches : leaves ovate-lanceolate, more or less long-
pointed, mostly entire, rarely or slightly serrulate at the apex ;
the costa longer, vanishing below the apex ; basilar cells more
numerous, small, nearly square, generally filling the whole base
of the leaves : capsule longer, cylindrical-oblong, pale green,
subcernuous; pedicel longer, rough and reddish in the upper
part only, smooth and yellow below; lid large, conical, mamillate.—
Trans. Amer. Phil. Soo. xiii. 13.
H a b . On rocks and dry sand, near the bay of San Eraiioisco (Bolander).
61. H. illecebrum, Schwaegr. In more or less dense
yellowish or dirty green tufts; stems irregularly branching,
subpinnately ramulose; branchlets short, arcuate, turgid and
obtuse at the apex : leaves erect-spreading when moist, imbricate
when dry, ovate, with a short recurved acute point, very
concave, minutely serrate at the apex, shining; costa ascending
to above the middle, rarely forked: capsule horizontal, turgid,
ovate, brown, often of two colors; pedicel thick, very rough;
operculum convex-conical, apiculate. — Spec. Muso. ii. 225.
Scleropodium illeceh-um, Bruch & Schimp. Bryol. Eur. t. 557.
H a e . Shady sandy ground, San Francisco, California (Bolander,
Gibbons); Alaska (Kellogg).
Very variable; secondary stems sometimes dendroid.
S u b g e n u s X. ISOTHECIUM.
Primary stems creeping, the secondary erect, more or less
dendroid; branches close, fasciculate, curved on one side, or
flagellate and stoloniferous. Leaves small, close, open or imbricate
when dry, ovate-ohlong, acute or acuminate, rarely
smooth, more or less distinctly papillose on the back, costate to
the middle or above; areolation minute, vermicular-oblong, the
basilar short-angular or ovate. Inflorescence dioecious. Capsule
regular, suberect, oval-ohlong. Operculum short-rostrate. Pedicel
smooth, except in the last species.—Isothecium, Brid.
The type of this subgenus is H. myosuroldes, placed by Schimper iu
Eurhynchium. Some of the American species described here have a
marked resemblance to that moss, differing essentially in the areolation
being slightly papillose.
62. H. m y o su ro id e s, Linn. Tufts soft, pale green;
primary stems slender, long-creeping and radiculose, with small
leaves; secondary stems erect, branching and tree-like, very
ramulose, flagelliform; branches and branchlets inclined to the
same side: leaves of the secondary stem spreading, cordate-
lanceolate and narrowly acuminate, the rameal gradually narrower
and oblong-lanceolate to lanceolate, those upon the