I20 GEOLOGICAL SURVEY OF CANADA. 



259. P. ambigans, (Nyl.) Tuckerm. 



On trees at Comox, Vancouver Island, May 2nd, 1887. 

 {Macoun.) On bark of Douglas fir, Pearce Island, Gulf of 

 Georgia, B.C. {Dr. G. M. Dawson.) 



260. P. rhodocarpa, Koerb. 



Labrador or Newfoundland. {Wagkorne fide Eckfeldt.) On 

 bark, Arctic America. {Nylander.) On trees, northern British 

 Columbia, June, 1875. {Macjun.) 



261. P. communis, DC. 



On trunks and rocks. 



Labrador or Newfoundland. ( Waghorne fide Eckfeldt.) On 

 trunks at Baddeck and Margaree, Cape Breton Island, N.S.; on 

 trees, Madeline River, Gaspe Co., Que.; on trees and rocks in 

 woods at Ottawa, Ont.; and on trunks, Aylmer, Que.; on beech 

 trunks at Belleville, Hastings Co., Ont.; on trunks, Jordan station, 

 Lincoln Co., Ont., May 17th, igoi ; on trees, Canfield Junction, 

 Haldimand Co., Ont.; on maple bark, Algonquin Park, Ont., July, 

 1900 ; on trees, falls of Nipigon River, Ont. (Macoun^ On 

 bark, Rigaud Mountain, Vaudreuil Co., Que. (Rev. G.Ducharme.) 



262. P. leioplaca, (Ach.) Sch^r. 



On trees and rocks. 



On bark of trees at River Head, Sparrible Cove, and Middle 

 Arm, Newfoundland. (Wagkorne.) Canada. (Richardson) On 

 trees, Ste. Anne des Monts River, Gaspe Co., Que.; on trees at 

 Amqui station, Intercolonial Railway, Que.; on trunks in woods, 

 at Baddeck and Margaree, Cape Breton Island, N.S., July, 

 1898 ; on beech trees in woods at Buckingham, Que., 1896. 

 {Mar.oun) 



The above includes P. lavigata, Nyl., which has not been 

 separated by us. 



263. P. pustulata, (Ach.) Nyl. 



On bark of trees and dead wood. 



Coast of Gaspe, Que.; on old cedar rails north of Aylmer, Que., 

 May, 1897 ; on bark of trees at Belleville, Hastings Co., Ont.; on 

 alder trees at Revelstoke, B.C. (Macoun) 



