278 BRYACE^. [Leiytodon. 



103. LEPTODON, Mohr. (PI. 4.) 

 Stems short, depressed, pinnately or irregularly divided into 

 short branches. Leaves obtuse, opaque, smooth or slightly 

 papillose on the back, loosely imbricate. Flowers monoecious. 

 Vaginule distinct, covered with long hairs. Calyptra hairy. 

 Capsule subincluded, oval-oblong, soft. Lid rostrate. Peristome 

 simple, of 16 teeth. 



1. L. trichomitrion, Mohr. Plants rigid, in broad yel- 

 lowish green tufts ; primary stems creeping, filiform, naked, the 

 secondary short, with numerous short branches: leaves close, 

 open-ei"ect, ovate-lanceolate, acuminate to a blunt point, concave, 

 reflexed on the borders; cells oblong, fusiform, smaller and 

 quadrate along the borders near the base ; perichaetial leaves 

 of loose texture, the upper long, sheathing, narrowly acuminate, 

 passing above the base of the capsule : capsule cylindrical-ovate, 

 gradually narrowed to a short pedicel, thin ; teeth linear-lanceo- 

 late, whitish, remotely articulate, sometimes perforated along 

 tie dividing line; inner membrane entire or more or less 

 lacerated, adhering to the inner face of the teeth. — Obs. Bot. 

 27; Sulliv. Muse. Allegh. n. 88, and Icon. Muse. 112, t. 71. 

 Pterigijnandruin trichomitrion, Hedw. Sp. Muse. 82, t. 16. 

 JLasia trichomitrium, Beauv. Prodr. 72. Forsstroemia tricho- 

 mitria, Lindb. Ofv. Svensk, Vet. Akad. xix. 605. 



Var, immersus, Sulliv. Plants smaller: leaves broader; 

 the perichretial shortei'-acuminate : capsule subimmersed ; teeth 

 more densely articulate. — Icon. Muse. 112. X. immersiim, 

 Sulliv. & Lesq. Muse. Bor.-Amer. Exsicc. n. 234 ; Sulliv. Mosses 

 of U. States, 57. 



Var. irriguus, Renauld Ms. Leaves spreading when moist ; 

 costa simple, ascending to above the middle : pedicel geniculate, 

 exceeding the perichretial leaves ; vaginule with few short hairs. 



Hab. Trees, rarely on rocks; Northern and Middle States. The 

 varieties in the Southern States, the last on wet rocks in Florida {Fitz- 

 gerald). 



2. L. Ohioensis, Sulliv. More slender than the last; 

 secondary stems julaceous, less divided : leaves shorter, broader, 

 horizontally spreading when moistened ; areolation nearly 

 round; costa thick, vanishing above the middle: capsule and 

 operculum shorter. — Muse. Allegh. n. 89, Mosses of U. States, 



