112 BRYACEyE. [Desmatodon. 



oblong, the upper longer and tufted, Ungulate-oblong, obtuse 

 and short-apiculate at the apex, crenulate on the margin, 

 papillose and revolute in the upper part ; costa thick, vanishing 

 below or at the apex : male flowers terminal, sometimes in 

 detached plants or buds scattered in the compact tufts : calyp- 

 tra short, long-beaked : capsule long, narrow, cylindrical, erect 

 or slightly curved, broadly annulate ; lid conical-obtuse ; teeth 

 whitish, punctulate, distantly articulate, coherent nearly to the 

 middle, free above and split into irregular segments. — Muse. 

 Bor.-Amer. Exsicc. n. 93 ; Sulliv. Mosses of TJ. States, 28 ; 

 Icon. Muse. 45, t. 29. J)esmatodo7i Ohiooisis, Schimp. Syn. 159. 

 Hab. Sandstone rocks, Central Ohio, etc. ; common. 



4. D. Garberi. With the aspect and mode of growth of 

 D. arenaceiis, it differs in the dioecious inflorescence, the leaves 

 narrower, oblong or lingulate, lanceolate or obtuse to the apicu- 

 late apex, with borders inflexed above and not crenulate on the 

 margin, the costa percurrent, prolonged downward and decur- 

 rent below the base of the leaves, the cells of the areolation not 

 half as large, opaque and scarcely papillose on the back, the 

 cai^sule oblong-oval, broader in the middle, narrowed to the 

 pedicel and upward to the conical longer-beaked lid, the teeth 

 cut into two unequal segments free to the base, attached to a 

 short membrane, the annulus simple. 



IIab. Florida (Garber). 



5. D. Porteri, James. Dioecious : also closely related to 

 D. arenaceus, but differing in the stems much shorter (1 to 3 

 m.m. long), tawny green, the leaves oblong, tapering to the 

 acute apex, bordered in the upper part by a pellucid margin not 

 reflexed, the areolation very small and opaque, the dioecious in- 

 florescence, the capsule shorter, oblong, straight, the teeth 

 separated nearly to the base and split into nearly equal seg- 

 ments. — Aust. Muse. Appal, n. 123 ; Sulliv. Icon. Muse. SuppL 

 36, t. 23. 



Hab. On rocks at Easton, Pennsylvania (T. C. Porter); Niagara 

 Falls (G. W. Clinton). 



6. D. plinthobius, Sulliv. & Lesq. Dioecious ; plants 

 short, in pale green tufts : lower leaves ovate-oblong, with a 

 short hair-point, the upper lingulate-oblong, carinate-concave 

 Avith the borders revolute all around ; areolation minute, quad- 

 rate and very chlorophyllose, and papillose in the upper part ; 



