BARNES NORTH AMERICAN MOSSES. 295 



double or triple; teeth of the peristome eight, yellowish, each divided to 

 the base into two legs slightly split at the apex and marked with a median 

 line, when dry erect or spreading, distinctly articulate, more or less densely 

 papillose, especially below middle; cilia more or less perfect, smooth, fuga- 

 cious, sometimes wanting. Bot. Centralb. 44: 390. 1890. Garrison and 

 Sun River Canon, Montana. 



219. Orthotrichum euryphyllum Vent. Loosely cespitose, 2-3 cm. 

 high, dark green, rufescent: stem erect, branching: upper leaves 4 mm. 

 long, 1.5+ mm. broad, lower smaller, lanceolate from a broadly ovate 

 base, apex roundish, entire, or obtuse and slightly toothed, margin revo- 

 lute nearly to apex, so that apex is sometimes cucullate; costa ending far 

 below apex; cells hexagonal, 12-13 // diam., walls not thickened, reddish, 

 papillae single, minute, or wanting: autoicous: capsule immersed, thick, 

 broadly ovate, when dry constricted under the mouth, deeply sulcate to 

 the middle, striae 8, broad, of 4-6 rows of cells; column short, abruptly 

 narrowed into the pedicel; annulus double or triple; peristome double, 

 teeth 16, reddish, approximate in pairs, when dry radially spreading, 

 each interruptedly cleft almost to the base in the middle line, papillae 

 minute, and arranged in more or less regular lines; cilia 16, eight robust, 

 equaling teeth, papillose below, the intermediate eight rudimentary or 

 abortive. Bot. Centrabl. 44: 417. 1890. On stones: Ellensburgh, Wash- 

 ington. 



220. Orthotrichum niulniii Dicks. Monoicous: tufts lax, soft, green 

 or dirty green, 1-2 cm. high, brown radiculose at base: leaves broader 

 and softer than in O. cupulatum, obtuse, longtitudinally furrowed at the 

 base; cells quite uniform: perichaetial leaves longer and broader and some- 

 what sheathing at base: capsule emergent or exserted, larger and thicker 

 than in O. cupulatum, pyriform with a long neck abruptly contracted into 

 seta, with alternately long and short striae, lid red margined, beak short; 

 annulus compound (2-3), persistent; peristome double, teeth 16, when 

 dry erect, longtitudinally striate or slightly papillose; cilia often rudi- 

 mentary, 8 or 16, scarcely half as high as the teeth. Limpr. Laubm. 2: 

 42. O. cupulatum nudum, Braithw. Brit. Moss. Flora 2; 78. On lime- 

 stone rocks: Rockcliffe, Ottawa river. 



221. Orthotrichnm strictum Vent. Sub-species of O. Lyellii. Leaves 

 without gemmae, rigid, lanceolate; capsule with short seta; otherwise as 

 in O. Lyellii. Bot. Centralbl. 44; 419. 1890. Cascades, Enumclaw, Wash- 

 ington. 



222. Orthotrichum bnllatnni C. Mull. Monoicous: tufts lax, yellow- 

 ish green: stems slender, dichotomously branched, fastigiate, 2 cm. high, 

 flexuose: leaves not crowded, crispate or secund-twisted, when moist re- 

 curved from an erect base, rather broadly oblong, bluntly acuminate, 

 quite entire, almost smooth; margin strongly re volute; here and there 



