Mniian.] BEYACE^. 241 



stem-leaves remote or destroyed by maceration ; comal leaves 

 oblong-lanceolate, those of the branchlets densely imbricate, 

 broadly ovate, concave, acuminate ; inner costa soft, excurrent ; 

 areolation very broad and soft, chlorophyllose at the base only, 

 hyaline above : caj^sule horizontal or slightly inclined ; collum 

 twice as long as the sporangium ; lid convex-conical, acute, 

 orange-colored, the capsule being yellowish-brown ; teeth orange 

 at base, subulate and whitish at the apex. — Coroll. 68. Hryiun 

 Zierii, Dicks. PI. Crypt, i., t. 4, fig. 10 ; Bryol. Eur. t. 341. 



IIau. Near the Height of Land, Eocky Mountains of British America 

 [Lruiiunond). 



2. Z. demissa, Schimp. Tufts dense, reddish brown, 

 densely matted by a felt of radicles : stem-leaves ovate-lanceo- 

 late, costa vanishing below the apex ; comal leaves oblong- 

 lanceolate, long-cusj^idate by the excurrent costa ; branch-leaves 

 loosely imbricate : capside curved down on an arched pedicel, 

 clavate, its collum and sporangium of equal length, yellow, 

 chestnut-colored when old ; lid small, mamillate, oblique ; teeth 

 lanceolate ; segments of the inner membrane twice as long as 

 the teeth, united at the apex and adhering by transverse lacinite ; 

 cilia very short, single or bifid. — Coroll. 69. Jleesia demissa, 

 Hoppe & Hornsch., Regensb. Flora, ii. 106 (1819). Bryum 

 demissxim. Hook. Muse. Exot, t. 99; Bryol. Eur. t. 341. 



Hab. Fissures of rocks, Twin Lakes, Colorado (Downie, Eothrock & 

 Wolf, Porter); very rare. 



87. MNIUM, Linn. (PI. 3.) 



Plants larger than in Bryum, gregarious, or more generally 

 loosely and widely cespitose. Stems produced from basilar 

 innovations or from subterranean stolons, woody, tomentose, 

 rarely divided and sometimes bearing arcuate creeping flagelli- 

 form branchlets. Leaves 3-5-ranked, the lower smaller, distant, 

 the upper much enlarged, crowded and rosulate, broadly ovate 

 or spatulate; costa stout; borders thick, simply or doubly 

 dentate ; cells of the areolation very large, round-hexagonal, 

 hexagonal-oblong near the base, rarely chlorophyllose. Flowers 

 bisexual or dioecious ; the male discoid ; antheridia and clavate 

 paraphyses axillary, very numerous. Calyptra cucullate, narrow, 



