162 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



1[ f T[ Capsule symmetric, erect. 



Teeth bifid to the common membranous base. 

 Leaves subulate to lance-subulate from a broader 



base Ditrichum, 105. 189. 



Leaves broader. 

 Iiid short, conic or beaked . . Desmatodon, 110. 190. 



Lid elongated, conic ... . Trichostomnm, 108. 190. 



[Barbula may be sought here.] 

 Teeth deeply bifid or cleft to the base, free. 

 Iieaf-cells small, not enlarged at the angles, oblong 



above Dicrauella, 64. 180. 



Leaf-cells small, not enlarged at the angles, roundish 

 or quadrate above. 



Lid oblique Cynodontium, 59. 1 79. 



Idd straight LeptodoDtium, 116, in. 



Leaf-cells small, enlarged-quadrate at the angles Dicranam, 67. 181. 

 Leaf-cells large, distinct .... Aongstroeniia, 63. 



Teeth cribrose, perforate or slightly cleft. 

 Leaf -cells enlarged-quadrate at the angles. 



Capsule broad-pyriform Blindia, 98. 108. 



Capsule oval to sub-cylindric . . . Dicranoweisia, 57. 1 79. 

 Leaf-cells not enlarged at the angles. 

 Teeth large, mostly cribrose. 

 Pedicel little exceeding the often hair-pointed 



leaves Grimmia, 134. 197. 



Pedicel long, leaves hair-pointed . . Desmatodon, 110. 190. 

 Pedicel long, leaves not hair-pointed. 

 Leaves serrate just above sheathing base Encladinm, 46, 47. 

 IJeaves entire or crenulate above . . Didymodon, 104. 189. 

 Teeth small, often truncate or rudimentary. 

 Leaf-margins involute above .... Weisia, 55. 179. 

 IJeaf -margins revolute or plane. 

 iLeaves densely papillose in the upper part Didymodon, 104. 189. 

 Leaves not papillose. 

 Capsule long exserted, lid completely deciduous Pottia, 100. 188. 

 Capsule subimmersed, lid adhering to colu- 

 mella Sconleria, 137. 197. 



Teeth entire. 



[Cynodonfiutn and ^Eucladium may also be sought here.] 



Capsule with a long, thick apophysis . . Tetraplodon, 191. 208. 

 Cai)sule oval to subcylindric. 

 Not ribbed when dry. 

 Teeth short, leaves entire, narrow . . . Weisia, 55. 1 79. 



