324 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



short-lanceolate, sub-obtuse; costa scarcely percurrent, nearly smooth: 

 barren. Mac. Cat. 148. On bank of Columbia River, Revelstoke, B. C. 



363. Oligotrichum hercynicum (Ehrh.) DC. Stems 1-3 cm. high, 

 erect, rigid: tufts large, lax, glaucous green or brownish: leaves erect- 

 spreading when moist, imbricate and incurved when dry, oval and half 

 sheathing at base, then lanceolate-linear, acute, concave, incurved on 

 border and dentate above middle; costa with 10-15 lamellae on upper sur- 

 face, contorted-undulate, and with 2-4 short dentate lamellae in the upper 

 part on dorsal side: capsule ordinarily oblique, sometimes erect, oblong- 

 cylindric, slightly contracted below mouth, at first yellowish, becoming 

 brown, smooth, irregularly plicate when empty; lid convex-conic, beak 

 short; teeth of peristome unequal, variable in number. Husnot, Muse. 

 Gall. 277. Greenland; St. Lawrence Island; Behring Sea. 



364. Oligotrichum hercynicum latifolium C. M. & Kindb. Leaves 

 shorter, entire: capsule distinctly plicate. Mac. Cat. 149. Selkirk Mts. 



365. Pogonatum erythrodontium Kindb. Stem erect, simple, or fur- 

 nished with a short innovation above, naked below: leaves green, spread- 

 ing, flexuous and not incurved when dry, plane and patent when moist, 

 linear, lanceolate, acuminate, red-denticulate all around, not sheathing, 

 undulate, hispid or margined; cells round-hexagonal, chlorophyllose (also 

 the marginal): lamellae distinct, not . confluent, numerous, 20-30; costa 

 narrow, percurrent: capsule single, short, ovate cylindrical, erect, papillose, 

 wide mouthed; teeth red brown, narrowly hyaline margined all around, 

 narrowly lingulate: dioicous. Mac. Cat. 150. Vancouver Island; British 

 Columbia; Alaska. 



366. Pogoiiatum alpinnm microdontium Kindb. Leaves nearly en- 

 tire, or indistinctly denticulate. Mac. Cat. 152. St. Paul Is., Behring Sea. 



367. Pogonatum Macounii Kindb. Dioicous: laxly cespitose, green, 

 brownish when old: stem rooting only at base, dichotomously branched: 

 leaves very long; when dry spreading or patulose, flexuose and convolute; 

 when humid sub-plane, linear-lanceolate; cuspidate from short sheathing 

 dirty white base, densely and sharply serrate, spinulose and reddish at 

 back towards the apex; lamellae numerous, about 60, entire, each of round 

 hexangular cells; costa long excurrent; lower cells or leaf and base elon- 

 gate and narrow, upper oblong, cell walls often oblique and irregular; per- 

 ichaetial leaves shorter and more acute: seta robust, pale, finally orange; 

 capsule obliquely inclined, cylindric oblong, without neck, narrowed be- 

 low mouth, notangulose; lid large, conic-subulate, orange at base; teeth of 

 peristome 32, short. Mac. Cat. 152. On earth and rocks: British Colum- 

 bia; Vancouver Island; Alaska. 



368. Polytrichum conorhynchum Kindb. Differs from P.formosum 

 in leaves canaliculate, capsule shorter and broader, not attenuate at base: 



