72. P. speciosa, (Wulf.) Nyl.

Trees and mossy rocks in woods.

On trees and rocks in damp woods at Ottawa, Ont.; on old rails in woods, Brighton, Ont.; on moss on rocks, Foster's Flats, Niagara Falls, May 16th, 1901; on stones along Nipigon River, Ont., July, 1884; on birch trunks, Algonquin Park, Ont., June, 1900. (Macoun.) On Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.)

73. p. hypoleuca, (Muhl.) Tuckerm.

On trunks in woods near Wooler, Northumberland Co., Ont.,

Oct. 16th, 1893; on rocks, Lake Nipigon, July 17th, 1884; on trunks, rare, Red Pine Lake, Algonquin Park,Ont., July 19th, 1900.

(Macoun.)

74. P. leucomela, (Linn.) Michx.

Labrador. (Waghorne.) On trees at Carmanah, near Cape Beale, Vancouver Island, May 9th, 1892. (J. M. Macoun.)

75. P. ciliaris, (Linn.) DC, var. crinalis, ScHaer.

Newfoundland. (Desprcaux.) L'Anse au Clair, Labradoi. (Waghorne.) On rocks at Louisburg, Cape Breton Island, N.S.; on fence-rails, James Terill's farm, Brighton, Ont.; on dead wood within the spray of Lake Ontario at Wellington Beach, Prince Edward Co., Aug. 14th, 1868; on rocks, Lake Nipigon, July, 1884; specimens with wider lobes and much whiter in color have been gathered on earth on the prairie at Old Wives' Creek, Assa., May 30th, 1895. (Macoun.) On rocks, Lake Mis-tassini, northern Quebec, 1885. (J. M. Macoun.) Rocky Mountain and Arctic America. (Richardson.)

76. P. aquila, (Ach.) Nyl, var. detonsa, Tuckerm.

On rocks and trees. .

On the bases of beech trees at Edmonton, Ont. (James White.)

77. P. pulverulenta, (Schreb.) Nyl.

On trunks and rocks, and sometimes on the earth.

Arctic America. (Richardson.) On earth, Greenland. (Branth.) On trees at Ottawa, Shannonville, Belleville and Brighton, Ont.; on rocks, Nipigon River, Ont.; on rocks in woods, Jumping Pound Creek, and at Banff, Rocky Mountains; on rocks, Deer Park, Columbia Valley, B.C.; on rocks, Blackwater River, B.C.; on earth and rocks at Lytton, B.C., April 17th, 1889. (Macoun.)

Var. muscigena, Schreb.

X

Greenland. (Arct. Man.) Newfoundland. (Despreaux.) Arctic America. (Herb. Hooker.) L'Anse au Mort and L'Anse au Clair, Labrador; Middle Arm, Newfoundland. (Waghorne.)

Var. beucoleiptes, Tuckerm.

On rocks, Little Fox River, Gaspť Co., Que.; on rocks, Nipigon River, Ont., June 1884; on rocks, Deer Park, Lower Arrow Lake, Columbia River, B.C.; on rocks along Jumping Pound Creek, Rocky Mountains, June 14th, 1897. (Macoun.)

78. P. stellaris, (Linn.) Tuckerm.

On trees, dead wood, rocks and stones.

Greenland. (Branth.) Arctic America. (Richardson.) Independent, Labrador. (Waghorne.) On Rigaud Mountain, Vau-dreuil Co., Que. (Rev. G. Ducharme.) On trees, but not common, at Baddeck and Big Intervale, Cape Breton Island, N.S., July, 1898; on dead wood, Truro, N.S.; on trees, Ste Anne des Monts River, GaspÍ Co., Que.; very common on trees and rails at Ottawa and Casselman, Ont.; at Belleville and Brighton, Ont.; on trees at Winnipeg and Manitoba House, Man.; along Old

Wives' Creek; on poflar trees, Moose Mountain, Assa. and on Wood Mountain, Assa., 1895; on trees near Victoria, Vancouver Island, May, 1893. (Macoun) On old rails and apple and plum trees, Edmonton, Ont. (James White.) On scrub oak, Greenwood, Man.; near Yorkton, Assa. (Thos. Walker.) Chamisso Island in Eschscholtz Bay; Little Koniushi Island, of Shumagin Group; and Glacier Spit, Cook's Inlet, Alaska. (Rothrock.)

Var. aipolia, Nyl.

On bark of black ash, Seymour West, Northumberland Co., Ont.; on bark of trees at Ottawa, Ont., and at Aylmer, Que.; on trunks, Pelee Point, Essex Co., Ont., May 27th, 1901. (Macoun) On maple and black ash trees, Edmonton, Ont. (James White.)

79. P. astroidea, (Fr.) Nyl.

On old rails and trunks of trees,

On old rails near Hintonburg, Ont.; abundant on the upper part of a fallen hemlock, near Hemlock Lake, McKay's woods, Ottawa, Ont., and on old rails at Aylmer, Que., May 22nd, 1897. (Macoun)

80. P. hispida, (Schreb.) Tuckerm.

On trees, dead wood and rocks.

Arctic America. (Richardson) On old rails, quite rare, Big Intervale, Cape Breton Island, N.S., July, 1898; on rocks at Campbellton, Restigouche River, N.B.; on boulders at Belleville, and fence-rails at Brighton, and on trees, Seymour West, Ont.; on poflar trees, Stony Mountain, Man.; on poflar bark, Sea's farm, Victoria, Vancouver Island. (Macoun.)

Var. leptalea, Ach.

Parmelia marina, E. Nyl.

Mullin's Cove, Labrador. (Waghorne) On an old wharf at Comox, Vancouver Island, June 24th, 1893. (Macoun)

81. P. caesia, (Hoffm.) Nyl.

On rocks, Greenland. (Branth.) On rocks, Long Island, Newfoundland. (Waghorne) On Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme) On rocks, C‚che Lake, Algonquin Park, Ont., July, 1900; on rocks, Lake Nipigon, Ont.; on rocks in woods at Banff, Rocky Mountains; on rocks, Deer Park, Lower Arrow Lake, Columbia River, B.C.; on old fences, Hastings, Burrard Inlet, B.C. (Macoun.)

82. p. tribacia, (Ach.) Tuckerm.

East Ste. Modeste, Labrador. (Waghorne.) On red ash trees along Lake Duchesne, above Britannia, near Ottawa, Ont, Oct. 27th, 1900; abundant on oak trees, Pelee Point, Essex Co., Lake Erie, May 27th, 1901. (Macoun.)

83. p. crispa, (Pers.) Nyl.

Labrador. (Waghorne.)

84. P. obscura, (Ehrh.) Nyl.

On trees, dead wood and rocks.

Greenland. (Branth.) Arctic America. (Richardson.) Labrador. (Waghorne.) On Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.) On black ash trees at Edmonton, Ont. (James White.) On trees at Baddeck, Cape Breton Island, N.S., July, 1898, rare; on trees at Ottawa, Ont.; on bark of trees at Hull, Que.; on ash trees at Belleville and on trees and fence-rails at Brighton, Ont.; on trunks of trees, Algonquin Park, Ont., June, 1900; on rocks, Lake Nipigon, Ont.; on trees at Red Rock, Lake Superior; on trees, Lake Winnipegosis, Man.; on rocks, Jumping Pound Creek, Rocky Mountains, June 14th, 1897; in the Crow's Nest Pass, Rocky Mountains; on rocks, Deer Park, Lower Arrow Lake, Columbia River, B.C. (Macoun.)

Var. endochrysea, Nyl.

Labrador. (Waghorne.) On rocks, Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. Ducharme.) On black ash trees near Ottawa, Ont., April, 1895; on moss on Laurentian rocks at Shan-nonville, Hastings Co., Ont., Sept. 20th, 1868. (Macoun.)

85. P. setosa, (Ach.) Nyl.

On mosses; on rocks and trunks.

On trunks in woods at Brighton, Ont.; not uncommon on trunks in many places around Ottawa, Ont.; on trunks, Algonquin Park,

Ont, June, 1900; on rocks at Banff, Rocky Mountains; on dead trunks along Jumping Pound Creek, Rocky Mountains, June 12th, 1897. (Macoun.)

86. P. adglutinata, (Floerk) Nyl.

On beech trees in Beechwood cemetery, Ottawa, Ont., April 23rd, 1892. (Macoun.) Apparently rare in Canada