212 BULLETIN OP THE UNIVERSITY OF WISCONSIN. 



A. Annulus present. (B on p. 213.) 



1. Segments and cilia of endostome imperfect, often 



only a laciniate membrane . . TV. camptotrachela, 278. 



2. Segments of endostome not widely open along the keel, cilia none 



or short ( excl. W. longicolla). (3) 



Inflorescence autoicous . . . . . TV. acuminata, 216. 

 Inflorescence synoicous or dioicous. 



Costa very broad, %-% of leaf base ... TV. Cardoti, 265. 



Costa narrow. 

 Plants less than 1 cm., seta 5-8 mm., capsule wide 



mouthed when dry W. nudicaulis, 220. 



Plants small, seta longer, mouth of capsule con- 

 stricted when dry W. Bolanderi, 220. 



Inflorescence paroicous. 



[ W. nudicaulis may be sought here.] 



Neck shorter than sporangium, cilia none . W. polymorpha, 216. 

 Neck equaling sporangium, cilia more or less developed. 



Tufts low, 1 mm.-2 cm. high W. elongata, 216. 



Tufts higher, 2-5 cm W. longicolla, 217. 



3. Segments of endostome split and gaping along keel, cilia well 



developed. 



Inflorescence paroicous or polygamous. 

 Capsule pendent, touching seta, not contracted under 



mouth W. cucullata, 218. 



Capsule horizontal or pendent, not touching seta, con- 

 tracted below mouth. 



Costa excurrent, comal leaves revolute on the bord- 

 ers . . . . . . . W. canaliculata, 271. 



Costa vanishing below apex, comal leaves plane on 



the borders. 



Tufts 1-2 cm. high, basal membrane of the endo- 

 stome MJ to > height of teeth . W. nutans, 1 217. 

 Tufts 2-4 cm. high, basal membrane of the endo- 

 stome y height of teeth .... W. cruda, 2 218. 



i See Appendix, nos. 269, 270. 

 a See Appendix, no. 267. 



