45. A, ochroleuca, (Ehrh.) var. rigida, Fr.

Both arctic and alpine.

Greenland. (Arct. Man.) Greenland. (Branth.) On earth in Arctic America. (Richardson.) Ford's Harbor, Labrador; Cape Chudleigh and Nottingham Island, Hudson Strait; on earth, Baffin Land, north shore of Hudson Strait, 1896. (Dr. R. Bell) L'Anse au Mort and Blanc Sablon, Labrador. (Waghorne) Clearwater Lake, Labrador, 1896; Summit Lake, Manicouagan River, Que., 1895. (A. P. Low.) Newfoundland. (Despreaux.) Barren Grounds, Lat. 62o 03', Long. 103o 15', W. (/. W. Tyrrell.) On the summit of Mount Albert, Gaspe Co., Que. (Macoun.) Vancouver Island. (Herb. Hooker)

46. A. sarmentosa. (Ach.) Nyl.

On coniferous trees. Common on the Pacific Coast.

Greenland. (Branth) Cape Forteau, Leading Tickle and Blanc Sablon, Labrador. (Waghorne) On spruce and fir trees in woods at Baddeck and Big Intervale, Cape Breton Island, N.S., July, 1898; Salt Lake, Anticosti; Kicking Horse Lake and Moose Mountain, near source of Elbow River, Rocky Mountains; Donald, Columbia River, B.C.; Asulcan Glacier, Selkirk Mountains, B.C.; near McLeod's Lake, northern British Columbia; Hastings, Burrard Inlet, B.C.; on Douglas fir at Victoria, Nanaimo and Comox, Vancouver Island. (Macoun.) Chiliwack Valley, B.C., 1901. (J. M. Macoun.) Pease Island, Gulf of Georgia, Vancouver Island. (Dr. G. M. Dawson.) Skeena River, B.C., and Port Etches, Alaska. (J. M. Macoun?)

Var. cincinnata, Fr.

On earth in Greenland. (Dr. Branth.) Near Independent, Labrador. (Waghorne.) On earth (fertile), Newfoundland. (Despreaux.) Digge's Island, Hudson Strait, and North Bay, Hudson Bay, Aug., 1885. (Dr. R. Bell.)

47. A. nigricans, Ach.

Greenland. (Arct. Man.) On earth (fertile), Labrador, and Newfoundland, (fertile). (Despreaux, On earth, Clearwater Lake, Labrador, July, 1896. (A. P. Low.) Near L'Anse au Loup, Labrador. (Waghorne.) Ford's Harbor, Labrador; Mansfield Island, and Marble Island, Hudson Bay. (Dr.R. Bell) Summit of Mount Albert, Gaspé Co., Que.; on earth, summit of Gold Range, near Griffin Lake, B.C. (Macoun.) St. Paul Island and St. George Island, Behring Sea. (J. M. Macoun.)