166 BULLETIN OP THE UNIVERSITY OF WISCONSIN. 



B, Pleubocaepi. Gapsule on a very short lateral branch. 

 [FontinaliSf T>ichelyma and Ancectangium may be sought here.] 



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



[Species belonging to genera under "8 *" infra may be sought here.] 



Leaves distielious, witli broad vertical wing . . Fissidens, 81. 185. 

 Leaves pluriseriate. 

 Entire (except perhaps at tlie apex) and ecostate. 

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

 ""^Perichaetial leaves entire . . . Leucodon, 287. 227. 



Entire and costate. 

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



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



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



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



2. Peristome double, the inner often im.perfeot. 



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

 (* * on p. 167.) 



-I— Leaves papillose. 



Entire, ovate to ovate-lanceolate. 



— Teeth ciliate-papillose ...... Leskca, 301. 229. 



~' Teeth not papillose ..... Aiiomodon, 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. 



+- ■)- Leaves not papillose. 



Capsule straight. 

 Segments bifid or adherent to the teeth. 



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

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

 Segments not bifid nor adherent. 



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



Leaves costate Antitrichia, 290. 228. 



Capsule curved or arcuate . Uomalothecium, 309. 230. 



