Bryum.] BRYACE^. 223 



coiis-green, becoming brown by age, small in proportion to the 

 size of the plants, subglobose and truncate or turbinate and 

 wide-mouthed when empty ; pedicel long, generally reddish and 

 geniculate at base : teeth of the large peristome orange-colored ; 

 annulus none. — Mnhcm- albicans, Wahl. Fl, Lapp. 353. JBryum 

 Wahlenbergii, Schwaegr. Suppl. i. 2. 92, t. 70 ; Bryol, Eur. 

 t. 354 ; Sulliv. Mosses of U. States, 45. 



Var. nigricans. Plants short, dirty black, in more com- 

 pact tufts : leaves longer, narrower ; areolation pellucid. 



Hab. Wet sand, borders of springs and rivulets. The variety on per- 

 pendicular limestone rocks, California ( Bolander). 



19. W, Bigelovii. Plants long and slender, loosely cespi- 

 tose, repeatedly branching by innovations, ramulose from the 

 apex : lower leaves on the stems and branches small and distant, 

 gradually larger upward, open-erect, oblong-ovate (the comal 

 lanceolate-acuminate), concave, nearly entire or obtusely den- 

 ticulate and flat on the borders ; costa thick, percurrent or 

 vanishing below the apex : male flower terminal, gemmiform or 

 capitate : capsule long-pedicellate, inclined or pendent, pyri- 

 form-elliptical ; teeth closely articulate, the inner segments split 

 open, separated by three simple smooth cilia. — Bryum Bige- 

 lovii, Sulliv., Pacif. R. Rep. iv. 187, t. 5. 



Hab. Banks of streams above Sonora, at the base of the Sierra Nevada 

 [Bifjelow). 



The peristome is not described by the author. He remarks that the 

 yellowish green foliage, the shorter, more obtuse and nearly entire leaves 

 with close areolation, the less obovate capsule, and the capituliform male 

 flowers separate this species from IF. albicans, its nearest congener. The 

 species is by this affinity, or by the characters of the peristome, a Webera. 

 But the areolation and the form of the leaves seem to refer it to Bryum. 



85. BRYUM, Dill. (PI. 4.) 

 Plants perennial, radiculose. Leaves with a solid round 

 costa, generally excurrent ; cells of the areolation rhomboidal- 

 hexagonal, smooth, loose, solid. Flowers bisexual, monoecious 

 or dioecious, the male gemmiform, rarely discoid. Calyptra 

 narrowly cucullate, falling off before the ripening of the cap- 

 sule. Capsule on a long stout pedicel, j^yriform and passing 

 into a solid stomatose collum, regular or rarely slightly in- 

 curved, coriaceous. Lid convex, papillate. Peristome double ; 



