BARNES — NORTH AMERICAN MOSSES. 167 



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



+- Leaves costate. 



Cells isodiametric to oval-rhombic. 

 Papillose. 



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

 " Stem-leaves much smaller than branch-leaves Anomodou, 304. 230. 

 Not papillose. 



Annulus large, compound, perichaetial leaves 



costate Cryphasa, 275. 226. 



Annulus simple, perichaetial leaves ecostate Lescurasa, 414, 4.I8. 

 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, 4II. 

 Teeth reflexed when dry . . Anacamptodon, 296. 



Cells linear or vermicular. 



•^Annulus none Neckera, 281. 226. 



Annulus present Antitrlchia, 290. 228. 



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



-I— -1- Leaves ecostate.^ 



.Annulus none Neckera, 281. 226. 



Annulus present. 

 Leaf -cells quadrate at basal angles. 

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



- Plants large, capsule about i mm. long Cylindrothecinm, 310. 231. 

 Leaf-cells not quadrate at the basal angles Orthothecium, 315. 232. 



* * * Segments distinctly keeled, often broad. 



H— Capsule symm.etric, erect. (-1— -i— on p. 168.) 



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



•w- 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 . . Myurella, 300. 229. 



1 XaxitlieUum planum i=^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. 



