53. p. perlata. (Linn.) Ach.

Chiefly on old trunks of trees in swamps; sometimes on rocks.

On rocks, Bald Mountain, Tobique River, N.B. (G. U. Hay) Canaan Forks, Queen's Co., N.B. (J. Moser.) On Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.) On trunks of trees in woods, Big Intervale, Margaree, Cape Breton Island, N.S., 1898; on birch trees, Truro, N.S.; on trunks of trees, Gaspé Co., Que.; on trunks at Beechwood, Ottawa, Ont.;on trees at Chelsea,Que.; on trees at Belleville, Ont.; on old rails, Seymour West, Northumberland Co., Ont., 1893; on a fallen balsam in a swamp at Guelph, Ont.; on trees by Lake Erie at Leamington, Essex Co., Ont., May 29th, 1901; not uncommon, Algonquin Park, Ont., June, 1900; on trees, Goulais Point, Lake Superior. (Macoun.) Lake Superior. (Agassiz.)

54. p. perforata, (Jacq.) Ach.

On trees and stones.

On trees at Belleville, Ont.; on trees at Burrard Inlet, B.C., April 24th, 1889. (Macoun.) On a mountain at Spence's Bridge, B.C., 1892. (James McEvoy) Pacific coast. (Menzies.)

55. p. cetrata, Ach.

On an elm trunk in a swamp at Carleton Place, Ont., May 12th, 1900; on the timbers of the old wharf at Comox, Vancouver Island. (Macoun.) Near Cape Beale, Vancouver Island. (J. M. Macoun)

56. P. crinita, Ach.

On trees and rocks.

On trunks, Central Ontario Junction, Hastings Co., Ont.; on old rails by woods, Seymour West, and on trunks, Brighton, Northumberland Co., Ont.; on trees, Johnstone's Harbour, Bruce Peninsula, Lake Huron, Aug. 22nd, 1901. (Macoun.) On a beech tree at Credit Forks, Ontario Co., Ont. (Thos. Walker)

5 1/2

57. P. tiliacea, (Hoffm.) Floerk.

On trees and stones; commonly on beech and spruce trees.

Ste. Anne des Monts River, Gaspé Co., Que.; on beech trees,. Big Intervale, Margaree, Cape Breton Island, N.S., July T898; on trees in numerous places around Hull, Que., and Ottawa, Ont.; Paugan Falls, Gatineau River, Que.; on trees, Terrill's farm, near Wooler, Ont.; on birch trunks, Algonquin Park, Ont., July, 1900. (Macoun.) On bark of trees, Canaan Forks, N.B. (J. Moser.) On Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.)

58. p, Borreri, Turn.

On trees and dead wood; rare. Only collected in the neighbourhood of Ottawa, Ont. (Macoun.)

Var. rudecta, Tuckerm.

On dead wood at Ottawa, Ont.; on old rails, Brighton, Northumberland Co., Ont., Oct., 1893. (Macoun.) On maples at Edmonton, Ont. (J. White.) On old rails, Big Intervale, Margaree, Cape Breton Island, July, 1898; on trunks, Algonquin Park, Ont. June, 1900; on bark at Niagara Falls and Pelee Point, Ont., 1901. (Macoun.) On Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.)

59. p. saxatilis, (Linn.) Fr.

Common on trees, dead wood, fences and rocks.

Greenland. (Warming.) On trees,Bald Mountain,Tobique River, N.B. (G. U. Hay.) On Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.) Common on old logs on Cape Breton Island, N.S., and in woods, fruiting abundantly; old logs, Truro, N.S.; on trees, Ste. Anne des Monts River, Gaspé Co., Que.; on trees, Jupiter River, Anticosti, Que.; on old rails and trees at Ottawa and Belleville, Ont.; on trunks, Algonquin Park, Ont., June, 1900; on trees, North Bay, Lake Nipissing; on trees, Lake Nipigon, Ont.; on trees, Red Deer River, Man.; on spruce trees, Jumping Pound Creek, and in the Crow's Nest Pass, Rocky Mountains; on trees, Deer Park, Columbia Valley, B.C.; on rocks, Hastings, Burrard Inlet, B.C.; on trees, Burnside Road, Victoria, and on Mount Benson, Nanaimo, Vancouver Island. (Macoun.) On earth and logs, Fort Rupert, Vancouver Island. (Dr. G. M. Dawson.) Chil-liwack Valley, B.C.; St. Paul and St. George islands, Behring Sea. J. M. Macoun.)

Var. sulcata, Nyl.

On trees, dead wood, fences and rocks.

On old boards and posts, Main Station, Sable Island, N.S., July, 1899; on trees, Jupiter River, Anticosti, and along the Gaspé coast, Que.; not uncommon on old logs, fence-rails and trunks, at Ottawa, Ont.; on fence-rails, near Wooler, Ont.; on rocks, Lake Nipigon, Ont.; on old logs, Jumping Pound Creek, Rocky Mountains; on rocks, Deer Park, Columbia Valley, B.C.; on trees and old logs, Hastings, Burrard Inlet, B.C.; on oak trees, Burnside Road, Victoria, and on the old wharf at Comox, Vancouver Island. (Macoun.) On Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.) St. George Island, Behring Sea, and Middleton Island, Alaska. (J. M. Macoun.)

Var. panniformis, (Ach.) Schaer.

Greenland. (Arct Man.) Arctic America. (Herb. Hooker.) L'Anse au Clair and Battle Harbour, Labrador. (Waghorne.) On rocks, Lake Nipigon, Ont., July 17th, 1884. (Macoun.)

Var. omphalodes, Fr.

On rocks in alpine districts.

Greenland. (Arct. Man.) On rocks at Louisburg, Cape Breton Island, N.S., July, 1898; on rocks, Moose Mountain, Rocky Mountains, alt. 6000 feet; on rocks, Deer Park, Columbia Valley, B.C. (Macoun.) On rocks, St. Paul Island, Cape Vancouver and Unalaska Island, Behring Sea. (J. M. Macoun.)

Var. furfurascens, Schaer.

On rocks, Blanc Sablon, Labrador. (Waghorne.) 60. P. physodes, (Linn.) var. vulgaris, KÖrb.

Greenland. (Arct. Man.) Greenland. (Warming.) On trees, Clearwater Lake, Labrador, July, 1896. (A. P. Low.) On spruce twigs, Lat. 61°, Long. 1040, W. (/. W. Tyrrell.) On dead wood, Canaan Forks, N.B. (J. Moser.) Spruce trees', Lake Mistassini, northern Quebec, June, 1885. (J• M. Macoun.) On old boards, Main Station, Sable Island, N.S., July, 1899; quite common on trunks of trees, rails and old logs, Cape Breton Island, N.S., July,

1898; on rocks and dead wood, seldom fertile, on trees commonly so, Perce, Bay des Chaleurs, Bonaventure Co., Que.; 0:1 ash and other trees at Ottawa, Ont.; on trunks at Belleville, Ont.; on fence-rails at Brighton, Ont.; on old fence-rails, Seymour West, Northumberland Co., Ont.; on rocks, North Bay, Lake Nipissing; Algonquin Park, Ont.; June, 1900; on trees, Thunder Bay, Lake Superior; on deadwood and rocks, Nipigon River, Ont.; on trees along Jumping Pound Creek and Bragg's Creek, Rocky Mountains; on trees at Donald, B.C., July 6th, 1885; on rocks, Devil's Lake, Rocky Mountains; on old logs, Hastings, Burrard Inlet, B.C.; on rocks near Victoria, and on the old wharf at Comox, Vancouver Island. (Macoun.) On trees, New Westminster, B.C. (Law.) On dead wood, Alert Bay, Vancouver Island. (Dr. G. M. Dawson.)