CATALOGUE OP CANADIAN PLANTS. 45 



Var. arcuata, Koch. Western Winter-cress. 



. Barbarea vulgaris, K. Br. Hook. Fl. I., 39. 

 B. prcecox. R. Br. Macoun's Cat., No. 141. 



Quite common in wet places around Victoria, Vancouver Island. 

 (Macoun.} Dean's Inlet, B. C. (Dawson.~) Sitka and Norton Sound. 

 (Roth. Alask.y 



Var. stricta, Eegel. Common Winter-cress. 

 Barbarea prcecox, K. Br. Hook. Fl. I., 39. 



Mississagui Island, south side of St. Joseph's Island, Whiskey and 

 Cockburn Islands, Lake Huron. (J. Bell.} Queenston Heights ; Owen 

 Sound Bay ; Chicken Bay, east shore of Lake Huron ; north shore of 

 Lake Superior from the Sault Ste. Marie to Thunder Bay ; shore of 

 Eed Deer Lake, Manitoba ; Edmonton on the Saskatchewan ; Peace 

 Eiver valley. (Macoun.) Banks of rivers ; abundant from the eastern 

 provinces to Lat. 68. (Drummond.} 



45. ERYSIMUM, Linn. (TREACLE-MUSTARD.) 



(146.) E. cheiranthoides, Linn. "Worm-seed Mustard. 



Moist ground along streams, on dry ridges and prairies, in gardens 

 and cultivated fields from the vicinity of Ottawa to the Pacific. 

 (Macoun.} Throughout Canada, and in all the plains east of the Rocky 

 Mountains to Lat.67 on the Mackenzie. (Hooker.') 



(147.) E. asperum, DC. Prairie Eocket. 



A very prominent object on dry, gravelly soil throughout the prairie 

 region. It extends northward about sixty miles beyond Carleton, on 

 the Saskatchewan. (Macoun.} 



(148.) E. parviflorum, Nutt. 



E. lanceolatum, Hook. Fl. L, 64. 



E. asperum var. inconspicuum, Wat- Macoun's Cat., 143 var. 



Not so abundant as the preceding, but has been collected at Fort 

 Ellice; west of Touchwood Hills ; at Long Lake; Cypress Hills, near 

 Fort Walsh ; Hand Hills ; and at Morley, N. W. T. ; also on the dry 

 hills between Spence's Bridge and Cache Creek, B. C. (Macoun & 

 Hill.} On the Belly and Milk Rivers, N. W. T.; Nicoamen, B. C. 

 (Dawson.} 



(149.) E. orientals, E. Br. 



Introduced with ballast. Ballast heaps, Eichibucto. Apparently 

 naturalized in New Brunswick. (Fowler's Cat.} 



