1898] Macoun — Cryptogamic Flora of Ottawa. 31 



Var. rudecta, Tuckerm. 



Very common on old rails and dead wood, around Ottawa. On 

 dead wood and old rails in Stewart's Bush, April 12th, 1895 J o" dead 

 wood, living spruce trees and boulders, Rockcliffe Park ; on dead wood 

 at Britannia ; on dead pines, Aylmer Road, west of Hull ; on white 

 cedar north of Beechwood ; on dead trees at Carleton Place ; on a 

 beech tree in woods one mile south-east of Billing's Bridge ; on large 

 trees in woods, Leamy's Lake ; on old rails and logs, King's Mountain, 

 west of Chelsea, May 22nd, 1897. 



290. Parmelia saxatilis, (L.) Fr. 



On trunks, dead wood, and rocks. On trunks in woods at Leamy's 

 Like, May 7th, 1897 ; on tamarack and other trees in a swamp at 

 Stittsville, May 22nd, 1897. 



Var. sulcata, Nyl. 



On trunks, dead wood and rocks. On the branches of a dead 

 spruce, Rockcliffe Park, April 17th, 1895 > on boulders along a fence, 

 Ottaw'a East ; on red maples in woods near Leamy's Lake, Hull, Que. ; 

 on old logs and rails east of Stittsville ; on rocks and trunks. King's 

 Mountain, west of Chelsea, May 22nd, 1897. 



291. Parmelia physodes, (L.) Ach. 



On dead wood, old fence rails, boards and rocks. On the 

 branches of dead spruce, Rockcliffe Park, April 17th, 1895 ; on pine 

 stumps at Britannia ; on old fence rails and boards at Buckingliam, 

 Que. ; on old fence rails and tamarack trees at Stittsville ; on old logs 

 and rails. King's Mountain, west of Chelsea. 



292. Parmelia colpodes, (Ach.) Nyl. 



Not rare, chiefly on tamarack trees. In a swamp a little east of 

 Stittsville, north of the Can. Pac. Railway, May 14th, 1897 ; on trunks, 

 western slope King's Mountain, May 22nd, 1897. 



293. Parmelia oUvacea, (L.) Ach. 



On trees and old rails. On alders, red maple and red ash at 

 Britannia, April 20th, 1895 ; rare on pine trees west of Hull ; on old 

 rails, Ottawa East ; on old rails at Dovv's Swamp ; and on young pines 

 at Carleton Place ; on old pine stumps, Leamy's Lake ; common on 

 tamarack trees in a swamp at Stittsville, May 14th, 1897. 



Var. aspidiota, Ach. 



Same habitat as the species. On alder bushes at Britannia, April 

 20th, 1895 ; on alder bushes near Leamy's Lake, Hull, Que. ; on tam- 

 arack trees in a swamp at Stittsville, May T4th, 1897. 



