BARNES NORTH AMERICAN MOSSES. 167 



* * Segments not distinctly keeled, narrow. (* * *) 

 i Leaves costate. 



Cells isodiametric to oval-rhombic. 

 Papillose. 



Stem and branch-leaves similar . . . Leskea, 301. 229. 



Stem-leaves much smaller than branch-leaves Anomodon, 304. 230. 

 Not papillose. 

 Annulus large, compound, perichaetial leaves 



costate .*,'.- Cryphsea, 275. 226. 



Annul us simple, perichaetial leaves ecostate Lescnraa, 414, 416. 

 Annulus none. 



Endostome with cilia . . * . . Alsia, 279. 226. 



Endostome without cilia. 

 Teeth erect or incurved when dry. 

 Leaf-cells minute, obscure, alar cells elon- 

 gated ...... ! Neckera, 281. 226. 



Leaf -cells distinct, alar cells quadrate Myrinia, 410, 411. 

 Teeth reflexed when dry . . . Anacamptodon, 296. 

 Cells linear or vermicular. 



Annulus none Neckera, 281. 226. 



Annulus present Antitrichia, 290. 228. 



[Cylindrothecium, with leaves obscurely costate, may be sought here.] 



i H Leaves ecostate. 1 



Annulus none . Neckera, 281. 226. 



Annulus present. 



Leaf -cells quadrate at basal angles. 



Plants small, capsules about 2 mm. long Platygyrium, 8 307. 

 Plants large, capsule about 4 mm. long Cylindrothecium, 310. 231. 

 Leaf -cells not quadrate at the basal angles Oi'thotliecium. 315. 232. 



* * * Segments distinctly keeled, often broad. 



i Capsule symmetric, erect. (-H- on p. 168.) 



[Species of Hypnum with erect or sub-erect capsules will be sought here.] 



M- Leaves papillose. (-M- -M- on p. 168.) 



Plants large; branches erect, dendroid . . . Alsia, 279. 226. 

 Plants long, pendent from trees, branches filiform Meteorinm, 286. 227. 

 Plants small, branches erect, julaceous . . M yurella, 300. 229. 



i Taxithelium planum (=Hypnum planum Brid., L. & J. Man. 411) falls here, but 

 on account of lack of data in regard to the annulus it can not be exactly located. 

 See also Appendix, no. 416. 



