134. p. lanuginosa, (Ach.) Koerb.

On shaded perpendicular rocks.

Canada. (Drummond.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On limestone rocks in ravines at Margaree, Cape Breton Island, N.S., July, 1898; on limestone rocks west of Hull, Que.; under ledges in woods near Experimental Farm, Ottawa, Ont.; on rocks, Algonquin Park, Ont., June, 1900. (Macoun.) On Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.) On rocks, Kingston Mills, Ont., 1901. (J. M. Macoun.) On sandstone rocks, Credit Forks, Ont. (Thos. Walker.)

135. P. hypnorum, (Hoffm.) Koerb.

On the earth growing over mosses and twigs in alpine districts.

Greenland. (Branth.) Arctic America. (Richardson.) Newfoundland. (Despreaux.) Venison Tickle, Labrador; Half-Way Point, Newfoundland. (Waghorne.) On earth, South West Point, Anticosti; on earth in woods at Banff and on the summit of Sulphur Mountain, at Hector, on Moose Mountain and in the Crow's Nest Pass, Rocky Mountains; on earth in Roger's Pass, Selkirk Mountains, B.C.; on rocks, Cedar Hill, near Victoria, and on rocks, Mount Benson, Nanaimo, Vancouver Island. (Macoun.) On earth, Unalaska, Behring Sea. (J. M. Macoun.)

136. P. rubiginosa, (Thunb.) Delis.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On trees, Ste. Anne des Monts River, Gaspé Co., Que. August 18th, 1882. (Macoun.)

Var. conoplea, Fr.

On rocks at Truro, N.S., June, 1883; on the bases of trees, North Bay, Lake Nipissing, May, 1884. (Macoun.)

13V. P. leucosticta, Tuckerm.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On trees at Madaline River and on rocks, Ste. Anne des Monts River, Gaspé Co., Que.; on boulders in McKay's woods, Ottawa, Ont.; on rocks in Roger's Pass, Selkirk Mountains, B.C. (Macoun.)

138. P. Hookeri, (Sm.) Th. Fr.

On rocks, Greenland. (Vahl.)

139. P. brunnea, (Sw.) Mass

Greenland. (Vahl.) On earth, Arctic America. (Richardson.) On earth, Seal Lake, Labrador. (A. P. Low.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On earth at Baddeck and Margaree, Cape Breton Island, N.S., July, 1898; on earth, Jupiter River, Anticosti; on earth near Cape Rosier, Gaspé Peninsula, Que.; on earth, summit of Mount Albert, Gaspé Co., Que.; on earth, Tunnel Mountain, Banff, Rocky Mountains, 1891; on earth and logs at Hector, and on Moose Mountain, Elbow River, and in Crow's Nest Pass, Rocky Mountains; on earth, Albert Cation, Selkirk Mountains, B.C.; on earth at Hastings, Burrard Inlet, B.C. (Macoun.) Islands of Behring Sea. (Wright.)

140. P. microphylla, (Sw.) Delis.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On rocks, Greenland. (Branth.) On earth, Salt Lake, Anticosti; on damp rocks, Meech's Lake and on King's Mountain, near Chelsea, Que.; on rocks, Lake Nipigon, Ont.; also on stones at Ottawa, Ont.

141. P. lepidiota, Th. Fr.

On earth and rocks, Greenland. (Vahl.) Rofe Cove, in the Bay of Islands, Newfoundland. (Waghorne.) On rocks, Half-Way Creek, and on trunks at Margaree, Cape Breton Island, N.S., 1898; on earth, Salt Lake, Anticosti; on rocks, north shore of Lake Superior, and on the bases of trees, Lake Nipigon; on earth along Jumping Pound Creek, and on Mount Forget-me-not, Elbow River, Rocky Mountains, alt. 6,500 feet, 1897; on rocks by the sea, Craigflower, near Victoria, Vancouver Island. (Macoun.)

Var. coralliphora, Tuckerm.

On rocks, Deer Park, Lower Arrow Lake, Columbia River, B.C.; on rocks near Victoria, Vancouver Island. (Macoun.)

142. P. carnosa, (Dicks.) Tuckerm.

On rocks among mosses.

Great Bear Lake, Arctic America. (Richardson.) Labrador or Newfoundland. (Waghorne fide Eckfeldt.)

143. P. tryptophylla, (Ach.) Mass.

On trunks of trees and stones.

On bark, Greenland. (Branth.) Rofe Cove, Lark Harbour, Wild Cove and Shoal Point, Newfoundland. (Waghorne.) On dead wood, Gaspé Co., Que.; Mount Erskine, Salt Spring Island, Gulf of Georgia, B.C. (Macoun.)

144. P. Waghornei, Eckfeldt, Bull. Torr. Bot. Club, Vol. XXII., 246, 1895.

On turfy earth. Evidently a well marked species and not closely related to any other. Labrador or Newfoundland. (Waghorne fide Eckfeldt.)

145. P. plumbea, (Lightf.) Delis.

Labrador or Newfoundland. (Waghorne fide Eckfeldt.) On a birch stump and on exposed rocks, Grand Manan, N.B. (Willey.)

146. p. nigra, (Huds.) Nyl.

On calcareous rocks, Ste. Anne des Monts River, Gaspé Co., Que.; on limestone rocks, Rockcliffe Park and many other places around Ottawa, Ont. (Macoun. On rocks, Tadousac, Que. (A. T. Drummond.)

14V. P. Macounii, Tuckerm. MS.

On calcareous rocks, Jupiter River Anticosti, Que., Aug. 23rd, 1883. (Macoun.)