—68— 



ticulate; stem leaves diaphanous at apex for i-i the lengthy 

 margins plane or very slightly reflexed at base ; calyptra usually 

 glabrous. On rocks. From four stations in California. 



From Memoirs of the Torrey Botanical Club, 6 : No. 2. 



Brachythecium salehrosum flaccidum Br. & Sch. Gameto- 

 fihyte in wide loose dark-green mats ; stem and branches slender ; 

 branch leaves distant, spreading, more or less complanate, strongly 

 serrate, apex often twisted ; stem leaves very broadly triangular- 

 ovate approaching in outline those of B. Starkei, about 2 X 1.2mm., 

 very slenderly acuminate, slightly serrulate. Sporophyte with cilia 

 often 3. Capsule much like that of B. oxycladon. New Bruns- 

 wick ; Weehawken, N. J. ; Oneida, N. Y. B. salebrosum flacci- 

 dum is the extreme broad-leaved form of the species and may be 

 distinct, but at present our knowledge is insufficient to define it. 



Brachythecium flexicaule R. & C. Stems creeping, densely 

 radiculose, closely applied to the substratum, 5-1 2cm. long, pin- 

 nately branching; branch leaves narrowly lanceolate, 2-2.5 X °-5~ 

 0.65™**!., gradually narrowed to a very long slender apex, serrate; 

 median cells linear-vermicular, 12-14:1; basal cells broader and 

 shorter; extreme alar cells sub quadrate: monoicous. Sporophyte 

 usually not to be distinguished from that of B. salebrosum. Type 

 locality, John's Beach, Newfoundland (Waghorne) ; on earth, 

 Revelstoke, B. C. (Macoun, sent out as B. glareosum) ; on schis- 

 tose rocks. Manchester, Vt. ; New Jersey ; on decaying wood, 

 Bradford, Pa. ; Adirondack Mountains, N. Y. This species seems 

 to me to be almost identical with B. salebrosum densum Br. & 

 Sch. Bryol. Eur. pi. 550, but M. Cardot thinks otherwise. It is 

 easily distinguished from all its near allies by the extremely nar- 

 row stem leaves, gradually narrowed from just above the base to 

 the apex. 



Brachythecium Roteanum DeNot. Gametophyte in glossy 

 yellow-green mats; branches subjulaceous; branch leaves more 

 closely imbricated and appressed than in B. salebrosum, ovate- 

 lanceolate, long acuminate, 1.5-2 X 0.45-0.5501111., serrate above, 

 concave; median cells linear-fusiform, 10-12: 1; several rows of 

 basal cells much enlarged, quadrate to oblong-hexagonal; lower 

 stem leaves ovate, abruptly narrowed to a long, slender acumina- 

 tion, nearly entire, 2-2.4 X 0.9mm.; areolation much looser; mon- 

 oicous. Sporophyte 2.5cm. high; seta red-brown, smooth; capsule 

 red-brown, cylindric, nearly erect, slightly arcuate, about 3mm. 

 long, 4: 1; operculum conic rostrate ; annulus (?), cilia 2 or 3, 

 well developed, nodulose; spores granulose roughened, 13//. 

 Louisiana and Texas. Distinguished from B. oxycladon (£. lae- 

 tum Br. & Sch. ) by being monoicous and by the conspicuously 

 enlarged basal cells of the leaves ; from B. salebrosum by the 

 longer suberect capsule and leaves scarcely or not at all plicate ; 

 from both by its much shorter-acuminate perichsetial leaves. 



