BARNES — NORTH AMERICAN MOSSES. 283 



principally in shorter leaves, emarginate at apex, with a fine and nearly- 

 smooth hair point; basal cells hyaline. Mac. Cat. 60. — On limestone rocks: 

 Manitoba. 



160. Barbula lato-excisa C. M. & Kindb. — Differs from B. leptotrioha 

 in the leaves being green, nearly flat at borders; outer basal cells faintly 

 chlorophyllose, narrowly marginate. Mac. Oat. 60. — On the bases of trees: 

 Vancouver Island. 



161. Barbula rotundo-emarginata O. M. & Kindb. — Dioicous: plants 

 loosely tufted, brown, about 1 cm. high: stems beset with emarcid leaves 

 or naked below; comal leaves close, patent when moist, scarcely curved, 

 papillose, short obcordate, not sheathing; margins slightly or not recurved; 

 cells subquadrate, inner basal greater and hyaline; costa red and thick, 

 faintly rough at back, excurrent into a long hyaline or at base reddish 

 more or less denticulate hair-point. Mac. Cat. 60. — Sine loco. 



162. Barbula aloides Bruch & Schimp. — Dioicous: short, dull green: 

 leaves erect spreading, longer, rigid, linear lanceolate, acuminate, acute, 

 nerve incrassate in middle, convex at back, often reddish: capsule from 

 curving of the seta, cernuous or subhorizontal, cylindraceous, subarcuate, 

 rufo-fuscous on upper side, pale fuscous beneath; calyptra reaching a little 

 beyond the lid; annulus of small cells, long persistent, lid rostrate, acute; 

 teeth of peristome very slender, pale red, simply contorted, when dry arcu- 

 ate incurved with points assurgent; spores smooth. Tortula aloides, 

 Braithw.— Brit. Moss Fl. 1: 211. Newfoundland. 



163. Scouleria aquatica nigrescens Kindb.— Plants coarse and rigid, 

 in large dense black tufts: leaves oblong lanceolate, blunt and entire 

 at rounded apex, vein ending below it, often radiculose at base; margins 

 serrate, basal cells rectangular next vein, prosenchymatous near margin 

 but extending upward only a short distance; some leaves simply hyaline 

 at base with all cells rectangular. Bull. Torr. Bot. Club 22: 42. 1895.— 

 Vancouver Island; Sicamous and Roger's Pass, B. C. 



164. Scouleria marginata Britt.— Plants 3^ cm. high, gregarious, in 

 dense black tufts: stems wiry and naked at base, branching and densely 

 foliate above: leaves crowded, curled and twisted when dry, only upper- 

 most green, oblong Ungulate, serrate above middle, or obscurely serrulate 

 near base, teeth occasionally black and thickened; apex blunt, entire or 

 toothed; vein thick, ending below it, smooth on back; basal cells green, 

 rectangular, a narrow band near margin elongated, prosenchymatous, 

 forming a dark dense border nearly to apex of leaf, superposed by rounded 

 small cells: perichaetial leaves surrounding capsules, ovate lanceolate: cap- 

 sules small, broader than long, cupuliform when old; lid persistent on col- 

 umella, bordered with red; peristome none; mouth bordered; spores green 

 with a minutely roughened coat. Bull. Torr. Bot. Club 22: 42. 1895.— 

 Spokane Falls, Wash.; California. 



