Rich low woods, rather rare. Keswick, and at Eel River, Carleton Co., N B. (Fowler, Cat.) Gomin's wood, Quebec. (St. Cyr.) Vicinity of Montreal, 1821. (Dr. Holmes.) Stewart's bush and other localities near Ottawa, not uncommon. (Fletcher, Fl. Ott.) Miriwin's woods and elsewhere around Prescott, Ont.; common. (Billings.) Rich woods near Belleville, Hastings Co.; also at Castleton and Campbellford, Northumberland Co., Ont. (Macoun.) Vicinity of Hamilton. (Logie.) Rich woods, London, Ont. (Burgess. Millman.)
(2237.) O. aristata, Fisch. Hook., Fl. II., 195.
0. latifolia, Linn. Rothrock's Alaskan Plants, 456. Ounalashka. (Chamisso vide Hooker.)
Habenaria rotundifolia, Rich. Gray, Man. Ed. V., 500, Macoun, Cat.,
No. 1773. Platanthera rotundifolia, Lindl. Orchid. 286.
Occasionally met with in peat bogs; commoner westward. Riviere de Brig, Anticosti. (Macoun.) In damp woods near Rivière du Loup, Q. (Thomas.) Mingan Islands, Q. (St. Cyr.) Very abundant in the big swamp, Murray, Northumberland Co., Ont. Dow's swamp, near Ottawa. (Fletcher, Fl. Ott.) Lake Mistassini, N.E.T.; also South
Twin Island, James Bay. (J. M. Macoun.) Moose Factory, James Bay. (Cottar & Dr. Hay den.) Lake Winnipeg. (Back.) Slopes of Cypress Hills, Alberta. (J. M. Macoun.) Damp woods, Lake Win-nipegoosis; in the foot-hills at Morley and westward to Silver City, Rocky Mountains; also in a bog on the Rocky Mountain Portage, Peace River Canon, lat. 56°, and at McLeod's Lake, B.C., lat. 55°. (Macoun.) Banff, Rocky Mountain. (Prof. Fowler.) Between Fort Churchill and York Factory, Hudson Bay. (Dr. Rae.) Greenland. (Lange.)