556. A. androgynum, Schwaegr.
On earth in woods, Cāche Lake, Algonquin Park, Ont, 1900 , on banks above Leamington, Essex Co., Ont., May 25th, 1901; on old logs at Revelstoke, B.C , May, 1890. (Macoun.) Chilliwack Valley, B.C., 1901. A form with short leaves; on old logs along the Skeena River, B.C., May, 1892. (J. M. Macoun.)
557. A. palustre, Schwaegr.
North shore of Hudson Strait, Baffin's Land, 1897. (Dr. R. Bell.) In swamps at Edmonton, Ont., 1893. (Jas. Wh te.) Boggy ground, Lat. 61°, Long. 104o, W., 1893, also Pike's Portage, Great Slave Lake, May 25th, 1900. (J. W. Tyrrell.) Bogs, northern Labrador, 1897. (A. P. Low.) Boggy places, Sable Island, N.S., Aug., 1899; in wet woods, Bad leck, and on Smoky Mountain, Cape Breton Island, N.S., 1898; in bogs, Algonquin Park, Ont., 1900; in a peat bog at Galt, Ont.; in wet woods, Niagara Falls, Ont., 1901; along Jumping Pound Creek. Rocky Mountains, Alta. (Macoun.) Mouth of Little Salmon River, Yukon. Fruiting, June 16th. (Williams.)
Var. imbricatum, Bruch & Schimp. Very common in wet places at Dawson, Yukon. (Williams.)
558. A. turgidum, Schwaegr.
On wet ground, Fort Chimo, Ungava Bay, Labrador, Aug., 1896. (A. P. Low.) Sheep Camp, Dyea Creek, Alaska; sterile; Dawson, Yukon, very abundant; fruiting. (Williams.)