240 



BULLETIN OP THE UNIVERSITY OF WISCONSIN. 



Leaves acute or short acuminate. 

 Dioicous, leaves obovate or subrotund . R. NoYse-Cesareae, 356. 



Monoicous, leaves broadly ovate to ovate or oblong lanceolate. 

 Leaves decui*rent ...... R. Roellii,^ 508. 



Leaves not decurrent. 



Margin strongly reflexed . . . . R. Kegelianum, 507. 



Margin plane R. micans,- 365. 



RHYNCHOSTEGIUM, p. 358. 



Pedicel rough 



Pedicel smooth. 



Costa single, reaching half way or more. 

 Leaves apparently 2-ranked, plants of dry woods 

 Leaves spreading every way .... 

 Costa very short or none or double. 



Bicostate, annulus large .... 

 Uni- or ecostate, annulus none 



R. curvisetum, 360. 



R. serrulatum, 359. 

 R. nisei forme, 359. 



R. geophilum, 358. 

 R. deplauatum, 359. 



Hypnum Caloosiense Aust., JI. BoycB Aust., and H. Brandegei 

 Aust., insufficiently established and of uncertain relationships, are not 

 included in this key. 



THAMNIUM, p. 361. 



. T. Leibergii, 510. 

 T. neckeroides, 362. 



Branch and stem leaves apparently 2-raDked, complanate. 



Capsule oblong, without collum ... T. Holzin^eri, 511. 



Capsule oval, with a distinct collum . . . T. Big'elovii, 362. 

 Branch and stem leaves equally spreading. 

 Perichsetial leaves reflexed. 

 Cilia equaling teeth ..... 



Cilia short ...... 



Perichastial leaves erect. 

 Teeth with a hyaline, dentate margin . T. alopecurum, 509. 



Teeth not hyaline margined and toothed only at the 



articulations T. AUeghaniense, 362. 



1 R. Roellii is included under both heads since the character of the operculum is un- 

 known to me. 



' R. micans R. & C. Rev. BryoL 20: 21. 1893 — Hypnum micans Sw. L. & J, Man. 365. 

 See also Appendix, no. 505. 



