Desmatodon.] BRYACE^. 113 



costa stout, excurrent into a long whitish smooth flexuous hair : 

 male flowers gemmaceoixs, terminal : capsule cylindrical-oblong, 

 erect or slightly curved ; lid short-rostrate, obtuse, inclined ; 

 peristome short, with fragile whitish granulose teeth, split to 

 the middle ; annulus very large. — Muse. Bor.-Am. Exsicc. 

 n. 94 ; Sulliv. Mosses of U. States, 28, t. 2, and Icon, Muse. 47, 

 t. 30. 



Hab. Brick walls and pavements, Charleston, S. Carolina {Bavenel); 

 Nashville, Tennessee {Lesquereux); limestone rocks, Pennsylvania (Por- 

 ter); Texas (Lindheimer); Savannah, Georgia (./. Dounell Smitli). 



Belated to D. laUfolius, Bruch & Schimp., differing in the dioecious in- 

 florescence, the longer hair-point, the longer and narrower capsule, the 

 longer rostrate operculum and short calyptra, the large compound annulus, 

 and the short peristome with teeth divided only to the middle. 



7. D. Neo-Mexicanus, Sulliv. & Lesq. Monoecious : 

 densely cespitose, pale green : much like the last species, from 

 which it differs in the inflorescence and in the shorter whitish 

 teeth, which are scarcely sj^lit or nearly entire. — Muse. Bor.- 

 Amer. Exsicc. n. 95. 



Hab. Texas {Wright). 



8. D. nervosus, Bruch & Schimp. Monoecious: plants 

 short, 1 cm. long, subcespitose or pulvinate ; tufts dirty green : 

 leaves crowded, twisted when dry, oblong or subspatulate, 

 acuminate, concave, reflexed on the borders ; areolation more 

 or less papillose, dense in the upper part, loose and rectangular 

 in the lower ; costa vanishing below the apex or passing up 

 into a short point : male flowers gemmiform, at the base of the 

 fertile innovations : calyptra covering the capsule to near the 

 base : capsule elliptical ; lid short, obliquely beaked ; teeth 

 attached to a somewhat large membrane, very variable, short, 

 the segments unequal, often cohering, very papillose, ferru- 

 ginous, erect, open when dry, oblique when moist ; anmilus 

 simple. — Bryol. Eur. t. 132. Trichostommn convolutum., 

 Brid. ; Muell. Syn. i. 590. Grimmia atrovirens, Smith, Engl. 

 Bot. t. 2015. Barhula atrovirens^ Schimp. Syn. (ed. 2) 194. 

 Tortula atrovirens^ Lindb. 



Var. edentulus, Bruch & Schimp. Plants smaller : lid 

 erect, conical : peristome rudimentary. — Sulliv. & Lesq. Muse. 

 Bor.-Am. Exsicc. (ed. 2), n. 121. 



Kab. On clay and adobe walls, California {Bolander), very common; 

 Guadalupe Island, Lower California {Palmer). 



