CATALOGUE OF CANADIAN PLANTS. 271 



(1261.) C. foliosus, Gray. 



Carduusfoliosus, Hook. Fl. I., 303. 



Cirsium foliosum, DC. Torr. & Gray Fl. II., 461. Macoun's Cat, No. 

 1063. 



Prairies of the Rocky Mountains. (Drummond.) South Kootanie 

 Pass, 49th parallel ; also, North Fork of Old Man River, Rocky 

 Mountains. (Dawson.) 



(1262.) C. arvensiS, Pursh. Canada Thistle. 

 Carduus arvensis, Smith. Hook. Fl. I., 302. 



Cirsium arvense, Scop. Gray, Manual, page 274. Macoun's Cat., No.- 

 1062. 



Naturalized throughout the country and become a pestilent weed on 

 all badly cultivated farms. Many country roads in Ontario are almost 

 impassable in summer owing to the prevalence of this pest. 



(1263.) C. Hookerianus, Gray. 



Carduus discolor, var. fl. albis, Hook. Fl. I., 302. 



Upper wooded and sub-alpine region of the Rocky Mountains, north 

 of Lat. 49. (Douglas & Bourgeau.) At the base of the high lime- 

 stone cliffs at the entrance to Bow River Pass. (Macoun.) 



(1264.) C. eduliS, Gray. 



Wet or shady places, along the southern boundary of British 

 Columbia. (Gray.) 



(1265.) C. Kamtschaticus, Maxim. 



Cirsium Kamtschaticum, Ledeb. DC. Prodr. VI., 644. 

 Atkha, one of the Aleutian Islands. (Gray.) 



324. ONOPORDON, Vaill. (SCOTCH THISTLE.) 



(1266.) O. acanthium, Linn. 



Waste grounds generally escaped from gardens. Pictou, N". S. 

 (McKay.) Buctouche and Bass River, N.B. Rare. (Fowler's Cat.) 

 Vicinity of London, Ont. (Burgess.) Vicinity of St. Thomas, Ont. 

 (McGill Coll. Herb.) 



325. SAUSSUREA, DC. 



(1267.) S. alpina, DC. Hook. Fl. I., 303, in part. 



S. monticola, Richards. Hook. Fl. I., 303. 

 Elevated parts of the Rocky Mountains. (Drummond.) Eastern 



