BABNES NOETH AMERICAN MOSSES. 231 



Costa narrow, vanishing at point. 

 Alar cells quadrate. 



Leaves lanceolate, secund. carinate by the costa H. Nevadense, 1 332. 

 Leaves long subulate or filiform acuminate, neither 



secund nor canaliculate . . . H. sericeum, 2 42C. 



Alar cells not differing from the rest . H. psendosericeum, 310. 



CYLINDROTHECIUM, 3 p. 310. 



Capsules clustered (3 or 4) C. Floridanum, 312. 



Capsules solitary. 



Plants densely pinnately branched, leaves muticous C. concinnnm, 313. 

 Plants loosely pinnately branched, leaves pointed. 

 Gradually narrowly acuminate ... C. brevisetum, 311. 

 Acute or abruptly acuminate-apiculate. 

 Almost entire, only alar cells quadrate or rectangular. 

 Leaves acuminate-apiculate, teeth with 14-17 ar- 

 ticulations, capsule 1 : 3.5-4 . C. cladorrhizans, 310. 

 Leaves abruptly short apiculate, teeth with 6-8 



articulations, capsule 1 : 5-5.5 . . C. seductrix, 310. 

 Leaves not apiculate, teeth with 22-26 articula- 

 tions, capsule 1 : 2.5-3 . . . . C. compressum, 312. 

 Distinctly serrulate, all basal cells rectangular. 

 Annulus none, teeth obliquely striolate C. Drummondii, 312. 

 Annulus large, teeth vertically striolate . C. Sulliyantii, 313. 



CLIMACIUM, p. 313. 



Capsule straight, lid rostrate. 

 Ovate-oblong (1 : 2.5-3), leaves slightly decurrent and 



hollowed at basal angles C. dendroides, 4 314. 



Cylindric (1 : 5-6), leaves long decurrent and broadly 



auriculate C. Americanum, 6 314. 



Capsule arcuate, lid conic C. Ruthenicmn, 314. 



1 Hypnum (Camptothecium) Nevadense L. and. Man. 332. See also Appendix, no. 421. 



2 A closely allied but barren species is H. sericeoides O. M. and Kindb. See Appendix, 

 no. 420a. 



3 Three species belonging to this genus are described by Miiller & Kindberg from barren 

 specimens under the name Entodon Mull. C. Macounii is closely related to C. Drum- 

 mondii; the others are C. aciculare and C. expallens. See Appendix, nos, 423-425. 



4 See Appendix, no. 426. 

 * See Appendix, no. 427. 



