BARNES — NORTH AMERICAN MOSSES. 237 



Capsule with evident collum . . . B. ^laciale, 481. 

 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. leucoglaucum, 484. 



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

 rulate . . . . B. Columbico-rutabuliim,! 487. 

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

 Leaves not decurrent. 



Capsule short or roundish oval. 

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

 Oblique, pedicel straight . . . B. geiuiuasceus, 483. 



Capsule oblong cylindric. 

 Inner perichaetial leaves very abruptly 



pointed B. tracliypodium, .^75. 



Inner perichaitial leaves gradually acuminate B. asperrinium,- 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. Mtill,, 454; B. Rcellii, 

 R. & C, 457; B. harpldioides C. M. & K., 460; B. 2^-^6udoalbicans 

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

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

 Starkei R. & C, 473: B. spurio-rutabidum 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. cajspito8um,* 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. 



1 From description I cannot distinguish B. himprochryseum. See Appendix, no. 488. 

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

 3 See Appendix, no. 492. 



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