(2982.) P. gracilis, Hook., Sp. Fil., ii., 138. Hook. & Baker, Syn. Fil., 145. Watt, Can. Nat., iv., 363.

Macoun & Burgess, Trans. Roy. Soc. Can., ii., Sect, iv., 183.

Pteris gracilis, Michx., Fl. Bor. - Am., ii-, 262. Swartz, Syn. Fil., 99.

Pursh, Fl. Am. Sept., ii., 668. Hook., Fl. Bor:-Am., ii., 264. Allosorus gracilis, Presl, Tent. Pterid., 153. Gray, Man., Ed. 2, 591. Allosorus Stelleri, Ruprecht, Distr. Crypt. Vasc, in Imp. Ross., 47.

Lawson, Can. Nat., i., 272. Pellaea Stelleri, Beddome, Lawson, Fern Fl. Can., 235.

Occurs in the crevices of rocks from Labrador to British Columbia, but is by no means a common species. Morris Rock, Restigouche, and Grand Falls, St. John, KB. (Fowler.) Madawaska, KB. (Hay.) Woodstock, KB. (Jack.) Mingan Islands, Que. (St. Gyr.) On crystalline limestone, near the Lake of Three Mountains, River Rouge, Que. (D' Urban.) Cacouna, Que. (J.W.Dawson.) Rivière du Loup, Que. (Thomas.) Crevices of limestone rocks near Hemlock Lake, Ottawa, Ont. (Fletcher.) Lakefield. Ont. (Mrs. Traill.) On Guelph dolomites, Little Saugeen River, Durham, Grey Co., Ont. (H. M. Ami.) Crevices of wet rocks at the mouth of the Temiscami River, about twenty-five miles from the east end of Lake Mistassini, N. E. Ter.; summit of Mount Queest, Gold Range, B.C., altitude 7,000 feet. [J. M. Macoun.) Crevices of rocks near L'Anse à Fallon, Cape Rosier, Ste. Anne des Monts River, Gaspé, and Gunn River, Anticosti, Que.; limestone rocks along the River Moira near Belleville, Foster's Flats below the Whirlpool, Niagara Falls, rocks at Owen Sound, along the Kaminis tiquia River at and below the Kakabeka Falls, under the cliffs at Red Rock and Nepigon stations on the C. P. Ry., crevices of the Huronian slates seventeen miles from Michipicotin on the Magpie River, Ont.; Peace River Pass, Rocky Mountains, N. W. Ter.; crevices of rocks in rear of the C. P. Ry. water-tank at Kicking Horse Lake, Rocky Mountains, and at Mount Stephen, B.C. (Macoun.) Rocky hillsides, not common, Kootanie District, B.C. (Anderson.) Canada. (Goldie), to the Saskatchewan. (Drummond), in Hook. Fl. Bor. - Am.

(2983.) P. atropurpurea, Link, Fil. Hort. Berol., 59. Lawson, Can. Nat., i., 272. Watt, Can. Nat., iv., 363.

Macoun & Burgess, Trans. Roy. Soc. Can., ii., Sect, iv., 184.

Pteris atropurpurea, Linn., Sp. Pl., 1534 Michx., Fl. Bor. - Am., ii., 261. Pursh, Fl. Am. Sept., ii., 668. Hook., F]. Bor. - Am., ii., 264.

A widely distributed but very local fern, ranging from Ontario westward to British Columbia and northward to Great Bear Lake. Hamilton, Ont. (Logie.) Not rare in the crevices of limestone cliffs in the Dundas Ravine, Dundas, Ont. (Burgess.) Limestone rocks, Elora, Ont. (McPherson.) Crevices of rocks at the Whirlpool and Foster's Flats, Niagara Falls, Ont.; common at various places on rocks around Owen Sound and Colpoy's Bay, Ont.; rare in crevices of limestone rocks on the mountains near Kananaskis Station, Rocky Mountains, on the C. P. Ry., and on limestone cliffs. Clearwater River, north of Methy Portage, Lat. 57°, N. W. Ter.; canyon, near Buffalo Head Mountain, Rocky Mountains; crevices of dry rocks between Spence's Bridge and Cache Creek, B.C. (Macoun.) Hillsides on broken rocks, not common, Kootanie District, B.C. (Anderson.) Canada to Bear Lake and the Rocky Mountains. (Richardson, Drummond.) Mountains between Nicola and Kamloops, B.C. (Dawson.) Banff, Rocky Mountain Park. (J. Smith.)

(2984.) P. densa, Hook., Sp. Fil., ii., 150. Hook. & Baker, Syn. Fil., 149.

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

A rock species, confined so far as known to the provinces of Quebec and British Columbia, where it is rare. Found by Prof. Allen on Mount Albert, Shickshock Mountains, Gaspé, Que., in 1881, growing exposed to the sun on the steep walls of ravines, at 2000 to 3000 feet elevation. (Eaton.) Abundant on cliffs along the Fraser River above Yale and within the Cascade Mountains, notably at Chinaman's Bluff; on rocks, Sicamous, Shuswap Lake; and summit of Mount Finlayson, Vancouver Island, B.C. (Macoun.) Mount Finlayson, Vancouver Island, B.C. (Anderson.)