—68 — 



ticulate; stem leaves diaphanous at apex for ^-J the length, 

 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 sALEiJROsuNr Ki.AcciDUM Br. & Sch. Ganu'io- 

 p/iyie in wide loose dark-green mats ; stem and branches slender, 

 branch leaves distant, spreading, more or less complanate, strong- 

 ly serrate, apexoften twisted ; stem leaves very broadly triangular- 

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

 very slenderly acuminate, slightly serrulate. Sporophyte with 

 cilia often 3. Capsule much 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 dehne it. 



Brachythecium flexicauleR. & C. Stems creeping, densely 

 radiculose, closely applied to the substratum, 5-i2cm. long, pin- 

 nately branching • branch leaves narrowly lanceolate, 2-2. 5 X o. 5- 

 0.65mm., 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; monoi- 

 cous. Sphorophytc usually not to be distinguished from that of 

 B. salebrosum. Type locality, John's Beach, Newfoundland 

 (Waghorne): on earth, Revelstoke, B. C. (Alacoun. sent out as 

 B. glareosum) on schistose rocks, Manchester. Vt. : New Jer- 

 sey; on decaymg wood, Bradford, Pa. ; Adirondack Mountains, 

 N. Y. This species seems to me to be almost identical with B. 

 salebrosum densumBr. & Sch. Bryol. Eur. pi. 550, but M. Cardot 

 thinks otherwise. It is easily distinguished from all its near al- 

 lies by the extremely narrow stem leaves, gradually narrowed 

 from just above the base to the apex. 



Brachythecium Roteanum DeNot. i.ainctDphyte 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 X0.45-0.55mm., serrate above, 

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

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

 stem leaves ovate, abruptly narrowed tr) a long slender acumina- 

 tion, nearly entire. 2-2 4 x0.9mm: areolation muchlooser ; mon- 

 oicous. i)^6'r<?///j'/'t'2.5cm. high; seta red-brown, smooth; capsule 

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

 long, 4: i; operculum conic rostraie; annulus (?), cilia 2 or 3, 

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

 Louisiana and Texas, Distinguished from B. oxycladon {B. lae- 

 tiiiii 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 pericha^tial leaves. 



