CATALOQDE OF CANADIAN PLANTS. 45 



Var. arcuata, Koch. Western Winter-cress. 



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

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



Quite common in wet places around Victoria, Vancouver Island. 

 (^Jfacoim.) Dean's Inlet, B. C. (Dawson.) Sitka and Norton Sound. 

 (Both. Alask.) 



Var. stricta, Eegel. Common Winter-cress. 

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



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

 Cockburn Islands, Lake Huron. (/. Bell.) (Jueenston 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°. (Brummond.) 



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 theEocky 

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



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



A very prominent object on dry, gravelly soil throughout the pi-airie 

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

 the Saskatchewan. (Macoun.) 



(148.) E. parviflorum, Nutt. 



E. lanceolatwm, Hook. Fl. I., 64. 



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



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

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

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

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

 mil.) On the Belly and Milk Eivers, N. W. T.; Nicoamen, B. C. 

 (Dawson.) 



(149.) E. orientale, E. Br. 



Introduced with ballast. Ballast heaps, Eichibucto. Apparently 

 naturalized in New Brunswick. (Fowler's Gat.) 



