BARNES — NORTH AMERICAN MOSSES. 



239 



E. Stokesii, 354. 

 E. Oreganum, 355. 



Leaves not filiform. 

 Leaves serrulate all around. 

 Decurrent, excavate at basal angles. 

 Perichaestial leaves spreading 

 Perichastial leaves reflexed 

 Not decurrent nor excavate. 



Leaves ovate lanceolate, acuminate, segments 



split E. SuUiTantii,! 353. 



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

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



Leaves entire at the base. 



Decurrent E. semiaspernm, 50S. 



Not decurrent. 

 Lid not talf as long as the capsule . E. colpophyllum, 342. 



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



E. Dawsoni 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 

 Long subulate, dioicous 

 Jjeaf margins serrate or denticulate. 

 Filiform acuminate. 



Cilia none or rudimentary 

 Cilia 2, stout, nearly equaling segments 

 Acute or short acuminate. 

 Decurrent ..... 

 Not decurrent. 

 Capsule short, oval or oblong (1 : 2) 

 Capsule longer, cylindric (1:4). 



. K. demissnm, 355. 

 B. snbdemissum, 504. 



R. laxepatulum, 358. 

 . R. recurvans, 356. 



R. Roellii,' 508. 



B. microcarpum, 357. 

 R. subadnatnm, 606. 



II. Operculum short rostrate or conic. 



Leaves filiform acuminate. 

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

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



1 See Appendix, no. 603. 



