46 GEOLOGICAL SURVEY OP CANADA. 



46. SISYMBRIUM, Linn. (HEDGE-MUSTARD.) 



(150.) S. offlcinale, Scop. Hedge-mustard. 

 Erysimum officlnale, Linn. Pursh, 430. 



An introduced and unsightly weed found in all cities, towns and 

 villages throughout Ontario and the eastern provinces. 



(151.) S. linifolium, Nutt, 



S. junceum, Hook. Fl. L, 61. Macoun's Cat., No. 146. 



In some abundance along the Thompson Eiver below Spence's 

 Bridge, B. C., 1875. (Macoun & Hill.} 



(152.) S. sophioides, Fisch. Hook. Fl. I., 61. 



S. Sophia var. Richards, in Frankl. Journ., 1(5. 



York Factory on Hudson's Bay ; to the shores of the Arctic Sea, west- 

 ward of the Mackenzie Eiver. (Hooker.) Along Nelson Kiver near 

 York Factory. (R. Sell.') Lake Winnipeg. (Back.) 



(153.) S. Sophia, Linn. Flaxweed. 



Introduced from Europe. On the sand bar at the mouth of Magdalen 

 Eiver, Gaspe, 1882. (Macoun.) Borders of fences near Quebec. 

 (Brunei.) Montreal. (Maclagan & Holmes.*) East Street, Prescott, 

 Ont. (Billings') 



(154.) S. canescens, Nutt. Tansy-mustard. 



Cardamine (?) multifida, Pursh, 440. 

 S. Sophia, Pursh, 440 ; not Linn. 



In the low grounds, Lat. 50-60. (Richardson.) Plentiful about 

 the Saskatchewan and Eed Eivers. (Douglas.) In the Eocky Moun- 

 tains and about Fort Franklin, Lat. 66. (Drummond.) Very common 

 throughout the prairie region, and extending to Peace Eiver. Common 

 in the dry interior of British Columbia. S. incisum, Engelm. is included 

 in the above references. 



Var. brachycarpum, Torr. & Gray Fl. I., 92. 



S. brachycarpum, Richards, in Frankl. Journ., 16. Hook. Fl. I., 62. 



I take this to be the forest form and the one which is found both 

 East and North. St. Helen's Island, Montreal. (Maclagan.) Whiskey 

 Island, Lake Huron. (J.Bell) Point Pelee, Lake Erie ; Little Current, 

 Georgian Bay. North shore of Lake Superior at the Pic Eiver, and 

 quite frequent in the mixed forest and prairie to the Eocky Mountains. 



