; 1' ;
; I
: f
I ;
the apex ; perichætial leaves narrowed into a long filiform point :
capsule small, ovate, turgid, horizontal or mclined, subcernuous,
brown, becoming black when old ; peristome normal ; annulus
narrow. — Meth. Muso. 180; Muell. Syn. ii. 860. BracJiythe-
ciimi albicans, Bruch & Schimp. Bryol Eur. t. 553.
I Ia b . Grassy sandy ground in mountains; Rocky Mountains {Bourgeau);
Uinta Mountains, and Coeur d’Alene Lake, N. Idaho ( IFtiisoii).
40. H. b iv en tro sum , Muell. Dioeoious : plants small,
loosely cespitose, hriglit green ; branches very short, slender,
curved : stem-leaves close, erect, open, small, scarcely decurrent
at base, ovate-acuminate, not plicate, but ventricose at base on
both sides of the costa, recurved on the borders at the base
only, denticulate all around, costate to the middle ; alar cells
very small, chlorophyllose ; inner perichætial leaves sheathing
at base, more or less abruptly narrowed into a filiform reflexed
point, ecostate : capsnle small, cylindrical-oblong, not curved ;
lid conical, very shortly apiculate; teeth narrow; segments
split ; cilia rudimentary. — Bull. Torr. Club, v. 49, and Regensb.
Flora, Iviii. 90. Brachythecium splenclens, Aust., Coult. Bot.
Gaz. 11. 111.
H a b . Deep woods near Baton Rouge, Louisiana (Joor); on Palmetto
trunks, St. Augustine, Florida (J. Donnell Smith).
In aspect like small forms of H. lætum.
41. H. T h e d e n ii, Hartm. Dioecious : plants slender, loosely
cespitose ; stems very long, creeping, pinnately r.amulose : leaves
loose, erect, open, homomallous or falcate-secund, long, filiform-
acuminate from an ovate-lanceolate base, obliquely uncinate,
flexuous above when dry, serrulate all around, plicate, narrowly
costate to below the apex; inner perichætial leaves very long,
filiform-acuminate, serrate : capsule abruptly horizontal, short-
ovate, turgid ; operculum convex-conical, apiculate ; peristome
large ; teeth coarsely articulate above ; segments and cilia (2)
as long as the teeth, the latter marked with prominent articulations
; annulus simple. — Skand. El. ed. 9,11. Brachythecium
Thedenii, Bruch & Schimp. Bryol. Eur. t. 551. H. albicans,
var. Thedenii, Hartm. 1. c., ed. 10, 15.
H a b . Erroll Dam, Androscoggin River, New Hampshire (James).
42. H. Donnellii, Aust. Monoecious : plants small, compressed,
cespitose, bright or yellowish gi-een, shining; stems
slender, creeping, flexuous, with short thick simple branches :
leaves ovate-lanceolate, narrowly acuminate, striate, very entire
or rarely distantly serrulate at the apex, slightly falcate, loosely
imbricate ; costa narrow, enlarged at the base, vanishing in the
middle ; cells of the areolation large, the upper fusiform-acute,
the hasilar numerous, quadrate ; perichætial leaves small, nearly
similar, ecostate: capsule short-pedicelled, very small, oval,
suhhorizontal ; operculum conical, depressed ; inner peristome
short ; segments subentire ; cilia imperfect or none. — Coult.
Bot. Gaz. iv. 162.
H a b . Rotten wood, roots of trees and shells on the shell mound of
Charlotte Harbor (Pine Island), Florida (J. Donnell Smith, Austin).
March.
The simple short creeping stems, and the small suhhorizontal capsule
are peculiar characters which easily separate this species from all the
others of the group. At first sight it resembles H. microcarpum, Muell.,
hut the operculum of this last species is long rostrate-subulate, aud the
leaves are ecostate. The basilar quadrate areolation of the leaves is also
peculiar.
43. H. collinum, Schleich. Monoecious : plants small, in
dense hemispherical bright green tufts ; stems creeping, densely
radiculose, ramulose ; branchlets short : leaves close, imbricate
or subsecund, lanceolate-acuminate from a broadly ovate deeply
cordate base, concave, serrulate on the borders, oostate to the
middle ; basilar cells larger, chlorophyllose, the upper hyaline ;
perichætial leaves abruptly narrowed into a short narrow point,
ecostate : operculum highly convex, obtusely aouminate ; peristome
normal; annulus compound. — Muell. Syn. ii. 429.
Brachythecium collinum, Bruch & Schimp. Bryol. Eur. t. 548.
H a b . Fissures of rocks on liigh mountains ; Eocky Mountains (Drummond);
Colorado (Downie); Nevada (Watson); Cascade Mountains
(Lyall).
44. H. U tah en se. Synoecious : resembling the last, from
which it differs in its inflorescence, its smaller size, more delicate
texture, the oblong-lanceolate leaves, and the erect and
symmetrical capsule. — Brachythecium Utahense, James, Bot.
King Exp. 409.
H a b . On sandstone rocks, overhanging dry streamlets near Hanging
Rock Station, Echo Canon, Utah (TUaisoii); Bald Mountain, Western
Montana ( Waisoii).
* * Pedicel rough.
45. H. VGlutinum, Linn. Monoecious : plants in intricate
drooping tufts, bright or yellowish green; stems creeping.