(2985.) C. acrostichoides, E. Br., appendix to Franklin's First Journey, 767. Hook., Fl. Bor. - Am., ii., 264. Lawson, Can. Nat., i., 273. Watt, Can. Nat., iv., 363.

Macoun & Burgess, Trans. Roy. Soc. Can., ii., sect. iv., 185.

C. crispa, forma Americana, Hook., Sp. Fil., ii., 130. Allosorus acrostichoides, Spreng., Syst., 66. Gray, Man., 660. C. crispa, var. acrostichoides, Lawson, Fern Fl. Can., 236.

Is found, forming dense tufts, among rocks and in their crevices, from Lake Huron westward to British Columbia, and stretching northward to within the Arctic Circle. McLeod's Harbor, Manitoulin Island, Ont. (J. Pell.) Cumberland House to Great Bear Lake, N. W. Ter. (Richardson.) Between Echimamish River and Oxford House, and around Cross Lake and on Nelson River near Hudson Bay, Keewatin. (R. Bell) Common from Lake Winnipeg to the "Height of Land," towards the east, N. W. Ter. (J. M. Macoun.) Rocks along the Arctic coast from Mackenzie River to Baffin Bay. (Hooker.) Stony places in the Rocky Mountains, but rare, to the sources of the Columbia Biver, B.C. (Drummond), thence to the Grand Rapids of the Columbia. (Douglas.) Kicking Horse Pass, Rocky Mountains, Selkirk Mountains, common in the Cascade and Gold ranges, along the Fraser River at Agassiz, and common on Vancouver Island, B.C. (Macoun.) Wigwam River, Koo-tanie Valley, Rocky Mountains. (Dawson.) Yale, B.C. (Fletcher.) Common at Victoria, B.C., among rocks on bare hills. (Anderson.)