BARNES NORTH AMERICAN MOSSES. 237 



Capsule with evident collum . . . B. glaciale, 48!. 



Cells of basal angles distinct, small or dilated, quadrate 



or oblong rectangular. 

 Leaves decurrent. 



Broad ovate, faintly striate, dioicous . B. platycladum, 475. 

 Triangular ovate, deeply plicate, monoicous. 

 Seta long (1.5 cm.), faintly rough, teeth ser- 

 rulate ..... B. lencoglaucum, 484. 

 Seta long (2 cm.), very rough, teeth not ser- 

 rulate B. Columbico-rutabulum, 1 487. 

 Seta short (5-8 mm.), faintly rough . B. mirabnndnm, 489. 

 Leaves not decurrent. 



Capsule short or roundish oval. 



Horizontal, pedicel arcuate above . . B. Bolaiideri, 341. 

 Oblique, pedicel straight B. gemmascens, 483. 



Capsule oblong cylindric. 

 Inner perichaetial leaves very abruptly 



pointed B. trachypodium, 478. 



Inner perichaetial leaves gradually acuminate B. asperriinum, 2 343. 



The following species are not included in this key, since the descriptions 

 are taken from sterile or immature specimens or are otherwise so incom- 

 plete as not to offer sufficient characters for their proper location: H. 

 Coloradense Aust., Man. 412; B. Fitzgeraldi C. Mull., 454; B. Radlii, 

 R. & C., 457; B. harpidioides C. M. & K., 460; B. pseudoalbicans 

 Kindb., 464; B. spurio-acumlnatum C. M. & K., 465; B. pseudo-colli- 

 num Kindb., 468; B. latifolium (Lindb.) R. & C., 472; B. pseudo- 

 Starkei R. & C., 473; B. spurio-rutabulum C. M. & K., 476; B. Vil- 

 lardi R. & C., 490; B. cirrhosum Sch., 491. 



SCLEROPODIUM, p. 346. 



Cilia solitary, rudimentary ..... S. Krausei, 493. 



Cilia 2-3, as long as the segments. 

 Seta rough throughout. 



Capsule erect or oblique, stem leaves gradually acu- 

 minate S. csespitosum, 3 346. 



Capsule horizontal, leaves abruptly short acuminate 



with point recurved . . . . S. illecebrum, 347. 



Seta rough and reddish above, smooth and yellow 



below . . . . . . . S. Californicum, 346. 



i From description I cannot distinguish B. lamprochryseum. See Appendix, no. 488. 

 *Hypnum vallium S. & L. is identical sec. Sull. Ic. Muse. Suppl. 100. 

 3 See Appendix, no. 492. 



