21. M. polyinorpha, Linn.
Godhavn, Greenland, June 25th, 1886. (Rosenvinge.) Labrador. (Waghorne.) On damp earth, Tobique River, N.B. (Hay.) On damp earth, Missinaibi River, northern Ontario. (Dr. R, Bell.) On earth, River Rouge, Argenteuil Co., Que. (D' Urban.) Cape Breton Island, N.S., and Woodstock, N.B.; in ditches at Truro, N.S.; on earth along the Gaspé coast, Que.; very common at Ottawa and Belleville and throughout Ontario; in swamps and wet woods, Nipigon River; on wet earth, Lake Manitoba, Man.,
1881; on wet earth in stream valleys, Cypress Hills, Assa., Jumping Pound Creek, Rocky Mountains, June, 1897; on earth in bogs, Eagle Pass, B.C.; in ditches at New Westminster, Vancouver, and Hastings, B.C.; wet places near Victoria, Gold-stream and Cedar Hill, Vancouver Island. (Macoun.) On earth Kootenay Valley, Rocky Mountains, B.C.; on earth at Adam's Lake, B.C.; Upper Liard River, northern B.C. (Dr. G. M. Dawson.) Saskatchewan and Rocky Mountains. (Bourgeau) Alaska. (Krause.) Glacier Bay, Orca, St. Paul Island, St. Matthew Island and Hall Island, Alaska. (Evans.) Nanaimo, Vancouver Island, also mountains near Juneau, Alaska. (Miss G. Cooley.) Unalaska. (Evans.) West Dawson, Yukon. (Williams.) East Greenland. The var. alpestris. (C. Jansen.)