280 GEOLOGICAL SURVEY OP CANADA. 



{Hook. Arct. PL) Specimens from the Rocky Mountains and British 

 Columbia seem to belong here, as they have the corniculate appendage 

 below the tip and glaucescent leaves. South Kootanie Pass, 49th 

 parallel. (Dawson.} Crossing of the Blackwater River, Northern 

 British Columbia. (Macoun.} 



Yar. lividum, Koch. 



Taraxacumpalustre,~DC. Macoun's Cat., No. 1091. 

 Leontodon palustre, Smith. Hook. Fl. I., 296. 



Outer involucral bracts ovate to ovate-lanceolate, all apt to be dark- 

 colored in drying, obscurely or not at all corniculate. Western summit 

 of the North Kootanie Pass, Lat. 49 30. ' (Dawson.} Cariboo Moun- 

 tains, B.C. (Cowley.} Departure Bay, Vancouver Island. (Meehan.} 

 Arctic Coast and islands, and the Aleutian Islands, in various forms. 

 (Gray.} Westernholme and below Bedevilled Beach, Lat. YG-TS". (Dr. 

 Kane.} On both sides of Baffin's Bay and Davis Strait, and on Melville 

 Island. (Capt. Markham.} 



337. LACTUCA, Linn. (LETTUCE.) 



(1309.) L. Canadensis, Linn. Wild Lettuce. 



L. clongata, Muhl. Hook. Fl. I., 296. 

 L.longifolia, Michx. Fl. II., 85. 



Rich soil in damp thickets. Quite common from Anticosti to thickets 

 in the western prairie region. 



(1310.) L. integrifolia, Bigel. 



L. elongata, var. integrifolia, Torr. & Gray Fl. II., 496. 



Leaves glabrous all undivided generally entire. Norton, N.B. (Hay.} 

 Dry sterile soil at Kingston, N.S. ; in the vicinity of Belleville ; also 

 on hill sides, North Hastings, Ont. (Macoun.'} On dry soil, 

 vicinity of Ottawa, Ont. (Fletcher.} Neighborhood of London, Ont. 

 (Burgess.} 



(1311.) L. hirsuta, Muhl. 



L. elongata, var. sanguined, Torr. & Gray Fl. II., 496. 



Leaves often ciliate on the margin and always hirsute on the midrib 

 below. Dry sandy woods east of Belleville, Ont., and abundant on 

 sterile soil, Rice Lake Plains. (Macoun.} Sandy fields, London, Ont. 

 (Burgess.} Vicinity of Ottawa, Ont. (Fletcher Fl. Ott.} 



