218 BULLETIN OF THE UNIVEESITY OF WISCONSIN. 



Leaves not margined or only indistinctly. 

 Closely appressed, imbricate. 

 Broadly ovate or obovate, abruptly apiculate B. argentenm 234. 



Ovate or lanceolate, not abruptly pointed . . B. Blindii 309. 

 Spreading, distant jj. Dnvalii,' 238. 



2. Cosfa exeurrent, leaves long-cuspidate. 



a. Capsule short {1 : g or less). 



Constricted between sporangium and coUum . . B. rersicolor 233 



Not constricted between sporangium and coUum B. coronatnm 232. 



b. Capsule longer {1: 3-\-). 



i. CoUum long, J^ sporangium or more. 

 IJeaves bordered with, two or more rows of cells. 

 Strongly twisted when dry, revolute . . . B. capillare,' 235. 

 Erect and straight when dry. 



Capsule scarcely constricted under the mouth, coUum 



costate, leaf margin revolute. . . B. obconicnm, 236. 



Capsule constricted under the mouth, collum smooth, 



leaf margin plane B. elegans, 319. 



Ijeaves not or very indistinctly bordered. 

 Abruptly cuspidate, oblong spatulate or obovate lance- 

 olate B. Hendersoni, 301. 



Gradually cuspidate, lanceolate or ovate-lanceolate. 

 Capsule constricted below the mouth . . B. caespiticinin, 235. 

 Capsule not constricted ... B. Tancouyeriense, 315. 



ii. Collum short (% sporangium or less) . B. occidentale, 236. 



§111. Rhodobryum. 



Oosta stout, exeurrent, leaf margins revolute % to % 



length B. Ontariense, 337. 



Costa vanishing, leaves plane B. lacidnm, 338. 



§IV. Anomobryum. 



Costa subexcurrent ...... B. concinnatnm, 240. 



Costa vanishing below apex ..... B. bnllatnm, SS9. 



The following species, described from sterile or immature specimens, are 

 not included in the key, since the meager descriptions render it imx>ossible 



' See Appendix, nos. 331, 335. 

 ' See Appendix, no. 317, 313, 344. 



