BARNES — NORTH AMERICAN MOSSES. 231 



■Costa narrow, vanishing at point. 

 Alar cells quadrate. 

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

 Leaves long subulate or filiform acuminate, neither 



secund nor canaliculate .... H. sericeum,*, .^^C 

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



CYLINDROTHECIUM," p. 310. 



Capsules clustered (3 or 4) C. Floridannm, 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. Sullirantii, 313. 



CLIMACIUM, p. 313. V 



Capsule straight, lid rostrate. 

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



hollowed at basal angles . . . . C. deudroides,* 314. 

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



auriculate C. Americanum,^ 314. 



Capsule arcuate, lid conic C. Ruthenicum, 314. 



' Sypnum (Camptotheoium) Nevadense L. and. Man. 332. See also Appendix, no. 421. 



^ A closely allied but barren species is H. sericeoides 0. M. and Kindb. See Appendix, 

 no. 420a. 



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

 specimens under the name Uniodon Miill. C. Macounii is closely related to C. Drum- 

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



* See Appendix, no. 426. 



^ See Appendix, no. 427. 



