280 GEOLOGICAL SURVEY OP CANADA. 



{Hook. Arct. PL) Specimens from the Eocky 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.) Ci-ossing of the Blackwater Eiver, Northern 

 British Columbia. (Macoun.) 



Yar. lividum, Koch. 



Taraxacum paliistre, 1)0. 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 coi'niculate. Western summit 

 of the North Kootanie Pass, Lat. 49° 30°. (Dawson.) Cariboo Moun- 

 tains, B.C. (Cowley!) DejDai'ture Bay, Vancouver Island. (Meehan.) 

 Ai'ctic Coast and islands, and the Aleutian Islands, in various forms. 

 (Gray.) Westernholme and below Bedevilled Beach, Lat. 76-78°. (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. 



X. elongata, Muhl. Hook. Fl. I., 296. 

 X.Zonjri/oHa, Michx. Fl. XL, 85. 



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

 in the westei-n prairie region. 



(1310.) L. integrlfolia, Bigel. 



L. elongata, var. integrifoUa, 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 Hastin.<,-8, Ont. (Macoun.) On dry soil, 

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

 (Burgess.) 



(1311.) L. hirsuta, Muhl. 



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



Leaves often ciliate on the margin and always hirsute on the midi-ib 

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

 sterile soil, Eice Lake Plains. (Macoun.) Sandy fields, London, Ont. 

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



