BARNES — NORTH AMERICAN MOSSES. 165 



++ ++ Inner peristome a membrane, carinate or out into sixteen 

 segments; these sometim,es separated by cilia. 



= Cilia very short, rudimentary or none. 



Membrane entire, 16-caxinate .... CincHdinm, 249. 221. 

 Membrane cleft into segments. 

 Segments entire or interruptedly cleft along the middle line. 

 Shorter than the teeth or rudimentary . . Funaria, 200. 210. 

 Equaling the teeth in length. 

 Leaves squarrose-recurved from the middle . Falndella, 213. 

 Leaves not squai-rose. 

 Pedicel long. 

 Leaf -cells narrowly rhombic-hexagonal, tending 



to linear, leaves narrow . . . Webera, 215. 211. 

 Leaf-cells and leaves broader . . . Bryum, 223. 214. 



Pedicel short, neck long .... Zieria, 240. 219. 

 Far exceeding the teeth in length. 

 Pedicel long, leaf-cells large, pellucid . Amblyodon, 211. 

 Pedicel long, leaf-cells small, rectangular, chloro- 



phyllose Meesia, 212. 211. 



Pedicel short, neck long .... Zieria, 240. 219. 



Segments bifld, divisions divaricate. 



Leaves lanceolate to subulate, large . . Bartramia, 203. 210. 



Leaves lanceolate or broader, smaller . Pliilouotis, 208. 211. 



Segments filiform, united by fours at their tips . Timmia, 254. 221. 



= = Cilia present. 



Appendiculate. 



Leaves lance-subulate, cells linear . . . Leptobryam, 215. 



Leaves broader, cells rhombic-hexagonal . . Bryum, 223. 214. 



Inappendiculate. 



Capsule not ribbed when dry. 

 Leaves lanceolate, glossy, cells narrowly rhombic- 



