(571.) O. aligerum, Mitt.; Lesq. & James, Mosses of N. America, 258; Canadian Musci, No. 218.

Grand Cote, Rocky Mountains. (Drummond.) On clay banks by roadsides at Hastings, B.C.; also on wet clay banks, west of Glacier Hotel, Selkirk Mountains, B.C. (Macoun.)

(572.) O. Lyallii, Lindb.; Lesq. & James, Mosses of N. America, 259.

In swampy places on the east side of the Cascade Mountains, British Columbia, at an elevation of 7,000 feet, July, 1860. (Lyall.)

(573.) O. hercynicum, (Ehrh.) DC, Fl. Fr. I. 492.

Not uncommon in Greenland. (Fl. Gr.) St. Lawrence Island, Behring Sea, 1891. (J. M. Macoun.)

Var. latifolium, CM. & Kindb. (n. var.)

Differs in the shorter and entire leaves; the capsule is distinctly plicate.

By a glacier stream descending from Hermit Mountain in Roger's Pass, Selkirk Mountains, July 31st, 1890. (Macoun.)