so 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 theNipigon 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 27th, 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. {Reii. G. 

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

 Island. {Dr. G. M. Dawson^ On trees near Cape Beale, Van- 

 couver Island. (/. M. Macoun) 



3. R. minuscula, Nyl. 



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

 On trees and branches ; not rare. 



