1898] Macoun — Cryptogamic Flora of Ottawa. 41 



278. Cetraria sxpincola, (Ehrh.) Ach. 



Rare. Occasionally in swamps. On branches of black spruce in 

 the Mer Bleue, Eastman's Springs, June i6th, 1891. 



279. Cetraria lacunosa, Ach. 



Rare in the Ottawa district. ; on trees and rails. On old fence 

 rails and boards at Buckingham, Que,, May 14th, 1896. 



280 Cetrartia Oakesiana, Tuckerm. 



Very rare in Canada. On the base of living pine trees and at the 

 base of pine stumps, Rockclifife Park, April 17th, 1895 ; on the base of 

 a pine stump by a swamp at Stittsville : old pine log. King's Mountain, 

 west of Chelsea, May 22nd, 1897, 



281. Cetraria juniperina (L.) Var. Pinastri, Ach. 



Rare in the Ottawa district. On dead brai ches of black spruce 

 and old logs in the Mer Bleue, at Eastman's Springs, June 16th, 1891 ; 

 on branches of tamarack in a swamp at Stittsville, May 14th, 1897. 



III. EVERNIA, Ach. 



282. Evernia prunastri, (L.) Ach. 



On trees, stumps and old fences ; rare. On old pine stumps at 

 Britannia, April loth, 1834 ; on old rails along the Richmond Road 

 above Hintonburg ; on an old fence, Ottawa East ; on trees in the 

 swamp west of Hull Station ; on branches of tamarack trees in a swamp 

 at Stittsville, May 14th, 1897. 



IV. USNEA, (Dill.) Ach. 



283. Usnea barbata, (L.) Var. hirta, Fr. 



On trunks south of the Aylmer Road, west of Hull, Que., April 

 26th, 1891 ; on a spruce tree, Rockcliffe Park ; on pine stumps at Bri- 

 tannia ; on spruce and tamarack trees in the Mer Bleue, at Eastman's 

 Springs ; on tamarack trees in a swamp at Stittsville ; old log. King's 

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



V. ALECTORIA, (Ach.) Nyl. 



284. Alectoria jubata, (L-) Var. chalybeiformis, Ach. 



Rare on dead wood or on the earth. On old ])ine stumps at Brit- 

 annia, April 20th, 1895 ; on tamarack trees in a swamp at Stittsville, 

 May 14th, 1897. 



Var. implexa, Fr. 



Quite commt)n in tamarack and other swamps, hanging like black 

 hair from the branches. On black spruce and tamarack in the Mer 

 Bleue, at Eastman's Springs, June i6th, 1891. 



