LIST OF MOSSES. 47 



DESMATODON, Brid. 



D. ARENACilftfs', SulHv: fy Lesqx. 



• Stones ; Devil's Hole and Caledonia, G. -W. Clinton. Rare. July. 



RARBULA, Hedw. 



B. UNGUICULATA, Hedw. 



Ground, claybanks. Variable and common. Nov. - April. 



B. caespitosa, Schwaegr. 



On the'ground in woods and about the roots of trees. Common. 



June. 



B. tortuosa, L. 



Rocks. Goat Island, Lesqx. Common about Niagara Falls, G. W. 

 Clinton. Helderberg mountains. Not frequent. June. 



B. convoluta, Hedw. 



Ground on mountains. Helderberg mountains, growing with Bryum 

 pyriforme, on ground on which charcoal had been burned. Rare.- 



B. mucronifolia, Schwaegr. 



Roots of an elm subject to inundation, Schoharie, Miss R. "Water- 

 bury. Stones; Devil's Hole and Portage, G. W. Clinton. June. 



B. fragilis, Wils. Trichostomum fragile, Hook. 



Humected rocks by waterfalls. Ausable river, near Lake Champlain ; 

 sterile, Lesqx. 



Closely caespitose ; stems erect, simple or forked, tomentose at the 

 base ; leaves closely imbricated, erect, plane on the nrargin, rigid, very 

 fragile, twisted when dry, lanceolate-subulate with an excurrent costa ; 

 areolation hyaline near the base, minute, chlorophyllose and papillose 

 above ; capsule erect, ovate-oblong, scarcely curved ; lid obliquely 

 long-beaked; teeth of the peristome convolute, very thin, fugacious ; 

 inflorescence dioecious. 



TRICHOSTOMUM, Hedw. 

 T. tortile, Schrad. 



Sandy ground, banks by roadsides, etc. Common. Nov. -March. 

 T. vaginans, Sidliv. 



On the ground ; Shawangunk mountains, C. F. Austin. 



November - March. 

 T. pallidum, Hedw. 



Clayey ground, fields and open woods. Common. June. 



T. glaucescens, Hediv. 



■ Cliffs and crevices of precipitous rocks. Adirondack mountains. 

 Ravine south of Albany. Rare. June. 



DIDYMODON, Hedw, 



D. RUBELLUS, Roth. 



Rocks, especially in ravines. Catskill mountains. Greenbush, near 

 Harlem R. R. bridge. Rare. Jurje, July. 



