40 The Ottawa Naturalist. [May- 



ays. R. fluitans, Linn, 



Very abundant in Patterson's Creek, Bank St., Ottawa ; also in the 

 Beaver Meadow Creek, west of Hull, Que., Oct. 9th, 1896. 



274. R. natans, (Linn.) Corda. 



In stagnant pools east of Beechwood Cemetery, April 23rd, 1892. 



Forma terrestris. 



Grows late in the season where pools had been in the spring. On 

 earth along the Ottawa and Lievre rivers, near Buckingham, 20 miles 

 below Ottawa, Sept. i8th, 1892 ; also along the discharge of Leamy's 

 Lake, Hull, Que., Oct. i6th, 1893. 



LICHENES. 



I. RAMALINA, Ach. 



275. Ramalina calicaris (L) var. fastigiata, Fr. 



On old rails, eld logs and trunks rather rare. On bark of young 

 red maples at Britannia, April 20th, 1895 ; rare on old logs near Ottawa 

 River, Hull : on a pine tree. Pine Hill, Rockclifife Park, rare on old 

 stumps and rails in a fence one mile southeast of Billing's Bridge ; also 

 on red maples Leamy's Lake ; on trees in a swamp in Stittsville ; old 

 logs King's Mountain, west of Chelsea. 



Var. farinacea, Schaer. 



On trees, old fence rails, and ledges of rocks. Rare on bark along 

 the CA.R. in Stewart's Bush, April 12th, 1895 : on old fence rails 

 West End Park ; on limestone ledges on the face of the cliff, opposite 

 Gatineau Point, Rockcliffe Park. 



Var. canaliculata, Fr. 



On a balsam fir in a swamp a little east of Stittsville, May 14th, 

 1897. 



276. Ramalina pusilla (Prev.) Var. genicu lata. Tuck. 



On twigs of spruce tress near Ironsides, Que., Oct. 6th, 1891. 



II. CETRARIA, (Ach.) Fr. 



277. Cetraria ciliaris, (Ach.) 



On old fence rails and boards and occasionally on pine stumps 

 and trees. On old fence rails. West End Park, April i6th, 1892 ; on 

 old board fencing at Buckingham, Que. ; on an old pine stump one 

 mile above Britannia ; on tamarack trees in a swamp at Stittsville, May 

 14th, 1897. 



