BARNES — NORTH AMERICAN MOSSES. 163 



Teeth short, leaves serrate, broad . . Syrrhopodon, 185. 207. 

 Teeth linear-flliform, connate at base Didymodon, 104. 180. 



Teeth narrowly lanceolate, free . . Dicranoweisia, 57. 179. 



Ribbed when dry Rhalbdoweisia, 58. 179. 



Capsule short-pyriform, turbinate when dry. 



Teeth blunt Seligeria, 96. 188. 



Teeth acute Blindia, 98. 108. 



Capsule pyriform, not turbinate when dry. 



Plants gregarious or subcespitose . . Entosthodon, 199. 209. 



Plants in deep compact tufts . . Mielichhoferia, 214. 211. 



Capsule ovate-globose, lid obliquely long-beaked Drummondia, 160. 209. 



Capsule globose, lid beakless, small . . Bartramia, 203. 210. 



++•«■++++ Teeth thirty-two. 



Teeth cancellate Barbula, 115. 191. 



Teeth filiform or linear, almost terete, arising from a long 

 or short basilar membrane. 

 Short, slightly, if at all, twisted. 

 Leaves (upper) convolute-sheathing at base Leptobarbula. 1S3, IS4 

 Leaves not sheathing at base. 

 Subulate or lance-subulate from a broader 



base Ditrichum, 105. 189. 



Broader, lid elongated-conic . . Trichostomnm, 108. 190. 

 [Barhv.la rigidula will be sought here.] 



Broader, lid short-conic or short-beaked Besmatodon, 110. 190. 



Long, twisted to the left Barbula, 115. 191. 



Teeth flat, not from a distinct basilar membrane. 



Cells of capsule linear-oblong . . . Bicranodontium, 77. 184. 



Cells of capsule irregularly polygonal . . Didymodon, 104. 189. 



-I— -I— Teeth not articulate. 



•M- Teeth four, solid. 



Capsule linear-oblong, stems long, conspicuous . Tetraphis, 186. 207. 

 Capsule ovate, stems very short . . . Tetrodontium, 187. 



++ -M- Teeth thirty-two or sixty-four. 

 [Leptobarbula may be sought here.] 



Calyptra cucuUate, capsule symmetric or nearly so. 

 Leaves undulate-crisped when dry, lamellaa few (2 — 8), 



straight Atrichum, 255. 221. 



