1898] Macoun — Cryptogamic Flora of Ottawa. 45 



299. Physcia stellaris, (L.) 



Very common on trunks and dead or living branches. On black 

 ash trees in a swamp in Stewart's Bush, April 12th, 1895 ; on dead and 

 living trees at Rockcliffe Park, Beechwood, Ottawa East, Dow's Swamp 

 and Skead's Farm, Richmond Road, and common at Britannia ; com- 

 mon on trees in woods at Leamy's Lake ; on balsam trees at Stittsville ; 

 on trunks and rails, King's Mountain, Chelsea, Que., May 22nd, 1897. 



Var. aipolia, Nyl. 



Same range as the species. On the bark of trees at Ottawa, 1884 ; 

 on a black ash trunk in a swamp west of Beechwood Cemetery ; on 

 beech and maple trees in woods one mile south-east of Billing's Bridge ; 

 on trees in woods, Leamy's Lake ; on tamarack and other trees at Stitts- 

 ville, May 14th, 1897. 



300. Physcia astroidea, (Fr.) Nyl. 



On old rails and trunks. On old rails near Hintonburg, April 

 18th, 1896; abundant on the upper part of a fallen hemlock near 

 McKay's Lake, Beechwood, Sept. 29th, 1896 ; also on old rails at 

 Aylmer, Que. 



301. Physcia hispida, (Schreb.) Tuckerm. 



On trees, but generally on boulders with us. On tlack ash trees 

 in a swamp in Stewart's Bush along the C.A.R., April 12th, 1895 ; on 

 boulders in a pasture along Brighara's Creek, near Leamy's Lake, 

 May 7th, 1897. 



302. Physcia obscura, (Ehrh.) Nyl. 



Trunks, dead wood and rocks. On the bark of white cedar in 

 Stewart's Bush, April 12th, 1895 ;on granite boulders, Rockcliffe Park; 

 on trees and limestone and granite boulders at Britannia ; common on 

 trees and rocks at Hull and Aylmer, Que. ; on trunks in Dow's Swamp ; 

 and on stones in Ottawa East ; on old fence boards at Billing's 

 Bridge ; on trunks and boulders between Brigham's Creek and Leamy's 



