88 BRYACE^. [Fissidens. 



135, t. 39; Biyol. Eur. t. 104; Braitliw. 1. c. 77, t. 11, D. 

 Hypnum taxifoUum, Linn. 



Hab. Shaded clayey ground in level districts; very common. 



21. F. adiantoides, Hedw. Plants 3 to 5 cm. long, 

 branching by radiculose innovations from the base or the apex : 

 leaves numerous, close, imbricate at base, linear-oblong, abruptly 

 acuminate and slightly mucronate, plicate to the middle; dorsal 

 wing long, continuous, slightly decurrent at base ; borders pel- 

 lucid, irregularly serrulate : flowers short-pedicellate, attached 

 to the middle of the stems : capsule oval-oblong, reddish brown, 

 much constricted under the orifice when empty; lid long- 

 beaked.— Muse. Frond. 61, t. 26 ; Bryol. Eur. t. 105 ; Braithw. 

 1. c. 78, t. 12, B. Hypnum adiantoides, Linn. 



Var. immarginatus, Lindb. Leaves without a pellucid 

 border. 



Hab. Shady moist ground, wet rocks, roots of trees, etc., mostly in 

 the plains; common. The variety at Boundary Lake, Canada {B,au). 



* * * * Floioers dicecious or unhnown. 



22. P. subbasilaris, Hedw. Plants widely cespitose, 1 or 

 2 cm. long, green above, brown and tomentose below : leaves 

 12 to 15 pairs, close, oblong, short-irointed, plicate to above the 

 middle, serrulate, not margined ; dorsal wing broad, rounded at 

 the base ; costa vanishing below the more deeply serrulate apex : 

 fruiting buds rarely pedicellate, attached near the base, radicu- 

 lose ; male flowers unknown : calyptra cucullate, narrow : cap- 

 sule oblong or cylindric-oval, erect, subcernuous, scarcely emerg- 

 ing above the stems on its short pedicel ; lid long-beaked. — 

 Spec. Muse. 155, t. 39; Sulliv. Muse. AlJegh. n. 184, Mosses of 

 U. States, 25, and Icon. Muse 41, t. 26. 



Hab. Trunks of trees, sometimes in dense tufts; Northern and Mid- 

 dle States. 



23. F. polypodioides, Hedw. Plants of large size, gre- 

 garious, radiculose at base, yellowish green, glossy, mostly 

 simple, rigid : leaves numerous, linear-oblong, abruptly rounded 

 to a blunt point, entire, not margined, plicate to above the 

 middle; dorsal wing continuous, rounded to the base; costa 

 thick, nearly percurrent: cells of the areolation irregularly 

 round, pellucid : flowers dioecious, the fertile attached to the 

 upper part of the stems, the male axillary nearer to the base, in 

 separate plants : capsule on a short flexuous pedicel, obovate, 



