BARNES NORTH AMERICAN MOSSES. 213 



Inflorescence dioicous. 



Leaves with plane or slightly curved borders. 

 Antheridia in the axils of the perigonial leaves. 

 Upper leaves lance linear (1 : 8-50) seta 3-4 cm. W. sphagnicola, 219. 

 Upper leaves lanceolate (1 : 4-5) seta 1-2 cm. W. gracilis, 275. 



Antheridia in a terminal cluster . . .TV. Lescuriana, 221. 

 Leaves with mostly re volute borders. 

 Costa vanishing below apex. 

 Leaves of sterile shoots ovate, obtuse; comal leaves 



broad pointed, margin entire . . W. Ludwigii, 274. 

 Leaves narrow, linear lanceolate, sharp pointed, 



plainly toothed near the apex. 

 Seta twisted to right, membrane of the inner peristome 



% length of teeth, capsule oval, short necked. 

 Annulus revoluble, costa red . . W. Columbica, 279. 

 Annulus remaining attached to lid, costa green W. pulchella, 222. 

 Seta twisted to left, membrane ^ length of teeth, 



capsule pyriform, longer necked ' . W. coiiimutata, 220. 

 Costa reaching the apex. 



Capsule oval, long necked, leaves serrate at apex TV. annotina, 219. 

 Capsule obovate, short-necked, leaves denticulate 



above W. pvcnodecurrens, 277. 



B. Annulus none. 



Leaves nearly entire, cilia very short . . TV. Drummondii, 219. 



Leaves nearly entire, cilia 3 . . . . . W. Bigeloyii, 223. 

 Leaves sharply serrate. 



Stem red, leaves glaucous-green . . . . W. albicans, 1 222. 



Stem and leaves green . . . . . W. carnea, 221. 

 [ W. pulchella may be sought here.] 



A number of species have been described from sterile and immature 

 specimens, whence it is impossible to determine their place in the key. 

 They are W. longibracteata Broth., 268; W. microapiculata C. M. & 

 Kindb., 281; W. polymorphoides Kindb., 266; W. microcaulon C. M. & 

 Kindb., 272; W. subcucullata C. M. & Kindb., 273; W. microdenticu- 

 lata C. M. & Kindb., 276. The first two are sterile, the remaining four 

 are immature. The numbers attached refer to corresponding descriptions 

 in the Appendix. 



1 See Appendix, no. 280. 



