146 Canadian Record of Science. 



Sisymbrium Alliaria, L. 



Naturalized along roadsides in Beechwood Cemetery, 

 Ottawa, Ont„ 1891. (W. Scott.) Only Canadian station 

 known to us. 



Sisymbrium officinale, Scop. 



Prof. Macoun (Cat. Can. Plants, Yol. I., p. 46) limits the 

 distribution of this species to Ontario and the eastern pro- 

 vinces. It has been since found at Sicamous, B. C. ; Nel- 

 son, Kootanie Lake, B. C. ; Esquimault and Nanaimo, Van- 

 couver Island. (John Macoun.) 



Sisymbrium sinapistrum, Crantz. 



First noted in 1885 along the Canadian Pacific Eailway 

 in the Eocky Mountains. It has since become one of the 

 most troublesome weeds in Manitoba and Assiniboia. Its 

 western limit, as shown by our specimens, is Eoger's Pass, 

 Selkirk Mts.. B. C. It is noteworthy that this plant thrives 

 equally well on the dry prairies and at the summit of the 

 Selkirk Mountains, where seldom a day passes without rain. 



Erysimum oriental e, E. Br. 



Collected at Castle Mt., Eocky Mts., in 1885, by Prof. 

 Macoun, but not recorded, and. in 1891, at the foot of 

 Devil's Lake, Eocky Mts. Probably "introduced at the 

 time the Canadian Pacific Eailway was being constructed, 

 and now thoroughly naturalized. Mr. Jas. Fletcher reports 

 that this plant has become a troublesome weed in many 

 parts of the North-West. 



Eryisimum parviflorum, Nutt. 



Eocky fields, Chaudiere, near Ottawa, Ont. (W. Scott.) 

 Probably introduced from the west in grain. We have no 

 other record east of Manitoba. 



Brassica campestris, Linn. 



Ottawa, Ont. (Wm. Macoun.) Waste places, Golden, 

 B. C, and Eevelstoke, B. 0. (John Macoun.) 



Brassica campestris, L., var. oliefera, DC. 

 Waste places, Ottawa, Ont. (W. Scott.) 



