50 GEOLOGICAL SURVEY OF CANADA. 



Not uncommon on old fences, old logs and trunks in woods at 

 Ottawa, Belleville and Brighton, Ont. ; on trunks, Algonquin 

 Park, Ont., 1900 ; on oak trees at Comox, Vancouver Island. 

 (Macoun.) On spruce trunks at Edmonton, Ont. (j. White.) 



Var. canaliculata, FR. 



Lobes narrow and channelled. Apothecia attached just below 

 the deflexed tips. 



On trees throughout the eastern provinces ; but rare. 



On trees, New Brunswick. (Prof. Fowler.) At Truro, Nova 

 Scotia ; Gaspe Peninsula, Quebec ; in the vicinity of Ottawa, Ont.; 

 Algonquin Park, Ont., June, 1900 ; along the Nipigon River, Ont.; 

 near Kananaskis Falls, Rocky Mountains. (Macoun.) 



Var. farinacea, SCHAER. 



Thallus either flattened or rounded, generally much branched 

 and finally attenuate ; besprinkled with white powdery soredia ; 

 apothecia rare. Apparently the commonest form of the species. 

 Common on both trees and rocks. 



L'Anse au Clair, Labrador. (Waghorne.) On trees, Salt Lake, 

 Anticosti ; on rocks and trees, Riviere Ste. Anne des Monts, 

 Gaspe, Que.; on trees, Brackley Point, Prince Edward Island ; on 

 old fences, Sable Island, N.S., July 2;th, 1899 >' on trees 

 and rocks, Big Intervale, on rocks at Louisburg, and on 

 trees at Grand Narrows and Baddeck, Cape Breton Island, N.S. ; 

 on rocks and trees near Ottawa, Ont. ; on rocks, Algonquin Park, 

 Ont., June, 1900; on trees at Belleville, Ont. ; on rocks, Thunder 

 Bay, Lake Superior ; on rocks Lake Athabasca ; on trees, Hast- 

 ings, Burrard Inlet, B.C.; Victoria and Comox, Vancouver Island. 

 (Macoun.) Rigaud Mountain, Vaudreuil Co., Que. (Rev. G. 

 Ducharme.) On trees, Alert Bay and Thurlow Island, Vancouver 

 Island. (Dr. G. M. Dawson.) On trees near Cape Beale, Van- 

 couver Island. (J. M. Macoun.) 



3. R. minuscula, NYL. 



R. pusilla, (Prev.) var. geniculata, Tuckerm. 

 On trees and branches ; not rare. 



