166 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



B. PLEUROCARPI. Capsule on a very short lateral branch. 



[Fontinalis, Dichelyma and Anwctanyium may be sought here.] 



i. Peristome single (rarely none), teeth eight or sixteen. 

 [Species belonging to genera under "2 *" infra may be sought here.] 



Leaves distichous, with broad vertical wing . . Fissidens, 81. 185. 

 Leaves pluriseriate. 

 Entire (except perhaps at the apex) and ecbstate. 



Perichaetial leaves erose-dentate at apex . Habrodon, 296. 



Perichaetial leaves entire .... Lencodon, 287. 227. 

 Entire and costate. 



Short acuminate, teeth 16, yellowish . Clasmatodon, 297. 



Obtuse, teeth 8, red Cryphaea, 275. 226. 



Serrate, capsule emergent .... Leptodon, 278. 226. 



Serrate to ciliate-dentate, capsule long pedicelled Fabronia, 294. 228. 



2. Peristome double, the inner often imperfect. 



* Segments none or short, or obscured by adhering to teeth. 

 (* * on p. 167.) 



H Leaves papillose. 



Entire, ovate to ovate-lanceolate. 



Teeth ciliate-papillose Leskea, 301. 229. 



Teeth not papillose .. .... Auomodon, 304. 230. 



Entire or cristate-serrate, obovate or spatulate Pterigynandruin, 288. 228. 

 Spinulose-dentate to fimbriate (rarely entire) deltoid or 



round-ovate . . Thelia, 298. 229. 



Serrate, broadly ovate .... Pterogonium, 289. 228. 



H H Leaves not papillose. 



Capsule straight. 



Segments bifid or adherent to the teeth. 



Plants small (1-2 cm.), capsules about 2 mm. . Pylaisaea, 308. 230. 

 Plants large (4-6 cm.), capsules about 4 mm.Cylindrothecium, 310. 231. 

 Segments not bifid nor adherent. 



Leaves ecostate or obscurely bicostate . . Neckera, 281. 226. 



Leaves costate . . . . , . Antitrichia, 290. 228. 



Capsule curved or arcuate , . . - Homalothecium, 309. 230. 



