296 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



plicatulate below, concave; costa thickish, carinate, glabrous, yellowish 

 at base, vanishing below apex; cells small, elliptical, not thickened, larger 

 and yellowish or orange at base: perichaetial leaves larger, secund at apex; 

 capsule immersed, inflated-oval, thin, pale yellow, strongly bullate, 

 slightly plicate; operculum flat, erect rostrate; peristome simple, teeth 16, 

 solitary, cupulate or erect, never reflexed, pale, narrowly lanceolate; 

 calyptra slightly plicate, pale, shining, with few hairs. Flora 70; 223. 

 1887. California. 



223. Orthotrichum speciosum Roellii Vent. Densely pulvinate, black- 

 ish green: leaves nearly smooth, papillae very minute, cells large as in 

 O. Killiasii; margin revolute: capsule emergent, oblong-ovate, smooth; 

 peristome normal. Bot. Centralbl. 44; 419. 1890. Chicago, Argyle, 111. 



224. Orthotrichum elegans Schwaegr. Tufts dark green, 1-2 cm. high, 

 softer and smaller than in O. speciosum: leaves lanceolate acuminate, re- 

 curved at border; cells at base colorless, thin walled, quadrangular, elon- 

 gated, passing gradually into rounded-hexagonal cells above, with one 

 or two small simple papillae: monoicous: capsule small, thin walled, 

 sub-cylindric, green and smooth before emptying, afterwards pale and slight- 

 ly costate in upper part; collum distinct, more or less elongated; peristome 

 double, 8 bigeminate teeth densely papillose, pale yellow, when dry re- 

 flexed against capsule but not revolute; cilia 8, filiform or linear, of 

 rows of cells, papillose, convergent but not touching at points; operculum 

 conic, apiculate, border pale red; hood conic-campanulate. Husnot, Muse. 

 Gall. 169. On ledges at Lake Pend d'Oreille, Idaho, to Kootenay River, 

 B.C. 



225. Orthotrichum Killiasii C. Mull. Closely related to O. specio- 

 sum but generally smaller, tufts pulvinate or sometimes flat, rigid, dirty 

 green: stem erect, branched, densely foliate: leaves appressed, when moist 

 erect-spreading, narrow lanceolate, obtuse, younger leaves acute; margin 

 revolute nearly to apex; cells thick walled, densely papillose with simple 

 and furcate papillae, above roundish or oval, at the base yellowish red, 

 rectangular, towards margin quadrate: inner perichaetial leaves larger, 

 longitudinally furrowed at base: capsule immersed or emergent, long 

 cylindric, with short 8-costate neck, when empty narrow cylindric, not 

 furrowed and somewhat constricted at mouth; lid red margined, beak 

 equal to diameter of base; annulus simple or compound (1-2); peristome 

 double, teeth when dry erect, originally united in pairs but soon separated, 

 densely papillose; cilia 8 (according to Schimper; to Venturi 16) robust, 

 papillose, margins sinuous. Limpr. Laubm. 2; 92. Disco Is., Greenland. 



226. Orthotrichum prsemorsum Vent. Densely pulvinate, 2-3 cm. 

 high, bright yellowish green, below reddish yellow: leaves long acuminate 

 from an ovate base, often apiculate, when dry often curved into a 

 cone, when moist becoming suddenly recurved, then erect spreading, 



