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 Anomodoii, 30i. 230. 

 Not papillose. 

 Annulus large, compound, perichaetial leaves 



costate Cryphseii, 275. 226. 



Annul as simple, perichaetial leaves ecostate Lescursea, 4/4. 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 Myriiiia, 410, 411- 

 Teeth reflexed when dry . . . Aiiacamptodon, 296. 

 Cells linear or vermicular. 



Annulus none Neckera, 281. 226. 



Annulus present Aiititrichia, 290. 228. 



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



-)— -h- Leaves ecostate.^ 



Annulus none Neckera, 281. 226. 



Annulus present. 



Leaf -cells quadrate at basal angles. 

 Plants small, capsules about 2 mm. long Platy^yriuni,^ 307. 



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

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



* * * Segments distinctly keeled, often broad. 

 •i— Capsule symmetric, erect, (-t— h— on p. 168.) 

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



•M- Leaves papillose. (•*-+ -m- on p. 168.) 



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

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

 Plants small, branches erect, julaceous . . Myurella, 300. 229. 



1 Xaxithelium planum {=Hyvnum 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. 



