22 
Wisconsin Academy of Sciences , Arts and Letters. 
B. Pleurocarpi. Flowers and fruit lateral, in the axils of leaves. 
[Fontinalis and Dichelyma may.be sought here.] 
1. Peristome single (rarely none), teeth eight or sixteen. 
[Species belonging to genera under “ B * ” infra may he sought here.] 
Leaves distichous, with broad vertical wing . . Fissidens, 81. 34-. 
Leaves pluriseriate. 
Entire. 
Ecostate, abruptly long-acuminate, cells quadrate 
except in costal region, distinct . . Habrodon, 296. 
Ecostate, cells linear or rhombic, obscure . . Leucodon, 287. 05. 
Costate, short acuminate . . . Clasinatodon, 297. 
Costate, obtuse, teeth 8, red .... Cryphaea, 275. 63. 
Serrate, capsule emergent.Leptodon, 278, 04. 
Serrate to ciliate-dentate, capsule long-pedicelled . Fabronia, 294. 05. 
2. Peristome double, the inner often imperfect. 
* Segments none or short, or obscured by adhering to teeth. 
Leaves papillose. 
Entire, ovate to ovate-lanceolate. 
Teeth ciliate-papillose .Leskea, 301. 06, 
Teeth not papillose .Anomodon, 304. 00. 
Entire or cristate-serrate, obovate or spatulate Pterigynaiidriini, 288. 
Spinulose-dentate to fimbriate (rarely entire) deltoid or 
round-ovate.Thelia, 298. 06. 
Serrate, broadly ovate.Pterogonium, 289. 65. 
Leaves not papillose. 
Capsule straight. 
Segments bifid or adherent to the teeth. 
Plants small (1-2 cm.), capsules about 2 mm. Pylaisaea, 308. 07. 
Plants large (4-6 cm.), capsules about 4 mm. Cylindrothecium, 310. 07. 
Segments not bifid nor adherent. 
Leaves ecostate or obscurely bicostate . . Neekera, 281. 64. 
Leaves costate.Antitrichia, 290. 05. 
Capsule curved or arcuate .... Homalotliecium, 309. 07. 
* * Segments not distinctly keeled, narrow. 
*■«— Leaves costate. 
Cells roundish to oval-rhombic. 
Papillose [except in Leskea pulvinata]. 
Stem and branch-leaves similar . . . Leskea, 301. 06. 
Stem-leaves much smaller than branch-leaves Anoiiiodon, 304. 06. 
