Atrichum.] BRYACE^. 257 



4. A. xanthopelma. Dioecious : widely and loosely cespi- 

 tose, blackish, slender : stem-leaves crispate, twisted when dry, 

 spreading Avhen moist, short and narrow, lanceolate, obtuse, 

 undulate on the borders, very narrowly margined upward to 

 near the apex, simply dentate with shoi't rarely aculeate teeth ; 

 costa 4-6-lamellate, sparingly dentate at the apex, more densely 

 on the back ; cells of the areolation small, quadrate, round- 

 hexagonal tOAvard the apex : calyptra very narrow, hispid at the 

 apex : capsule cylindrical, narrow, slightly curved on a long 

 yellow pedicel; lid obliquely rostrate from a highly convex 

 base; teeth of the peristome long and narrow. — Catharinea 

 '.rrtiithojyelma^ Muell. Regensb. Flora, Ivi. 482 (1873). 



I-lAB. Texas (/. Boll). 



Very closely allied, like the last, to A. angnstatum, of which it appears 

 to be a variety, differing only in the short simple teeth of the very narrow- 

 margin, those on the back of the costa similar to those of the margin and 

 very few, an 1 the pedicel yellow. 



5. A. Lescurii, James. Plants loosely cespitose or gre- 

 garious, nearly black : stems simple, 2 or 3 cm. long, slender, 

 naked below, loosely foliate above : leaves incurved-crispate 

 when dry, erect-spreading when moistened, linear-lanceolate, 

 acuminate, concave, sharply serrate on the borders, enlarged, 

 half-clasping and ciliate at base ; basilar cells subquadrate, the 

 upper nearly round, obscure ; costa percurrent ; lamelLTe 4 to 8, 

 convex on the back, serrate : capsule erect, cylindrical-ovate, 

 short, enlarged at the orifice and turbinate when empty; pedi- 

 cel short and thick. — Bull. Torr. Club, vi. 33. 



Hab. Alaska (Kcllogr/). A fine species, quite distinct in the narrow 

 crisped leaves, with 6 or 8 long flexuous cilia on each border near the 

 sheathing base, and in the serrate lanielte; lid and peristome not seen. 



0. A. crispum, James. Dioecious : plants densely gre- 

 garious, arising from a subterranean rhizome, dark green ; 

 stems 3 or 4 cm. long, erect, flexuous, simple, slender, radicu- 

 lose at the base only : leaves large, erect, open and spreading, 

 not sheathing, the upper closer, longer, lingulate-lanceolate, 

 undulate-crispate when dry, narrowly brown-margined, sharply 

 serrate on the borders, sn^.ooth on the back ; costa percurrent, 

 nearly round, with very few narrow lamellte ; basilar areolation 

 loose, oblong, the upper of small hexagonal chlorophyllose cells : 

 male flowers cup-shaped; outer perigonial leaves three, large, 

 spatulate-lanceolate, the inner numerous, very small, abruptly 



