BARNES — NORTH AMERICAN MOSSES. 239 



Leaves not filiform. 



Leaves serrulate all around. 



Decurrent, excavate at basal angles. 

 Perichaetial leaves spreading . . . . E. Stokesii, 354. 

 Perichaetial leaves reflexed . . . . E. Oreganum, 355. 

 Not decurrent nor excavate. 



Leaves ovate lanceolate, acuminate, segments 



split E, SulliTantii/ 353. 



Leaves broad ovate, acute, segments perforate E. prselougnm, 353. 

 Leaves broad ovate, acute, segments split . E. Iiians, 354. 



Leaves entire at the base. 



Decurrent E. semiasperum, 50£. 



Not decurrent. 

 Lid not half as long as the capsule . E. colpopliylliim, 342. 



Lid nearly as long as the capsule ... E. hians, 354. 



E. Dcnvsoni Kindb., App. 501, and E. crassinervium laxirete Kindb., 

 App. 500, are described from sterile specimens; hence they are not included 

 in this key. 



RAPHIDOSTEGIUM, p. 355. 



I. Operculum long subulate rostrate. 



Leaf margin entire. 



Ovate or ovate lanceolate, monoicous . . . R. demissum, 355. 

 Long subulate, dioicous .... R. snbdemissum, 504, 



Leaf margins serrate or denticulate. 

 Filiform acuminate. 



Cilia none or rudimentary . . . . R. laxepatulum, 358. 

 Cilia 2, stout, nearly equaling segments . . R. recuryans, 356. 

 Acute or short acuminate. 



Decurrent R. Roellii,^ 505. 



Not decurrent. 



Capsule short, oval or oblong (1:2) . . R. microcarpum, 357. 

 Capsule longer, cylindric (1:4). . . R. subadnatum, 506. 



II. Operculum short rostrate or conic. 



Leaves filiform acuminate. 



Cilia none, annulus none, capsule cylindric R. cylindrocarpum, 356. 

 Cilia 1, annulus simple, large, capsule oblong . R. Jamesii, 357. 



1 See Appendix, no. 503. 



