no GEOLOGICAL SURVEY OF CANADA. 



Ont.; on old fence-rails at Belleville, Hastings Co., Ont.; on old 

 rails near Wooler, Northumberland Co., Ont., 1893; on Alnusincana 

 along Jumping Pound Creek, foothills of Rocky Mountains ; on 

 young poplars, Sea's farm, Victoria, and on oak trees at Comox, 

 Vancouver Island. {Macoun.) 



Var. polytropa, Nyl. 



Alpine and sub-alpine rocks. 



Arctic America. {Richardson.) Middle Greenland. {Eberlin.) 

 On rocks, Labrador and Newfoundland. {Waghor/ie.) On lime- 

 stone rocks at Aylmer, Que., April 25th, 19QO. {Macoun.) 



Var. intrieata, Nyl. 



Alpine and sub-alpine rocks. 



Greenland. {Arct. Man.) Arctic America. {Richardson.) On 

 rocks. Chimney Cove, Newfoundland. {Waghorne.) 



Var. symmicta, Ach. 



On trees and dead wood. 



Labrador or Newfoundland. {Waghorne fide Eckfeldt.) On 

 old fence-rails, Main Station, Sable Island, N.S., July, 1899 ; on 

 old rails at Margaree and Grand Narrows, Cape Breton Island, 

 N.S., July, 1898; on bark and dead wood by the beach, Gaspe 

 Basin, Gaspe Co., Que.; on old rails and bark of living trees at 

 Ottawa, Ont.; on trees, Nipigon, Lake Superior ; on the old 

 wharf at Comox, Vancouver Island. {Macoun!) 



Var. ssepincola, Fr. 



On dead wood ; common. 



Abundant on old cedar rails and boards around Ottawa, Ont.; 

 at Belleville, Hastings Co., Ont.; on the old wharf at Comox, 

 Vancouver Island, June, 1893. {Macoun) 



ai4 L. symmictera, Nyl. 



Goose Arm, Newfoundland. {Waghorne) 



215. L. athroocarpa. (Dub.) Nyl. 



Trees, rocks and shrubs. 



On rocks. Coal Point, Newfoundland. (^Waghorne.) British 

 North America. {Richardson) On beech and maple trees at 



