166 BULLETIN OP THE UNIVERSITY OP "WISCONSIN. 



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



[Fontinalis, TUchelynia and Anoectangium 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. 186. 

 Leaves pluriseriate. 

 Entire (except perhaps at the apex) and ecostate. 



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



Perichaetial leaves entire .... Leucodou, 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, 291. 228. 



2. Peristome double, the inner often imperfect. 



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



(* * on p. 167.) 



-1— Leaves papillose. 



Entire, ovate to ovate-lanceolate. 



Teeth ciliate-papillose Leskea, 301. 229. 



Teeth not papillose Anomodon, 304. 230. 



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

 Spinulose-dentate to fimbriate (rarely entire) deltoid or 



round-ovate Thelia, 298. 229. 



Serrate, broadly ovate .... Pterogouium, 289. 228. 



H— -1— 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 (1-6 cm.), capsules about 1 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 . . - Homalotliecium, 309. 230. 



