94 FARM WEEDS OF CANADA 



resembles Wild Mustard, but only the root-leaves are 

 hairy. The stem, the upper leaves which clasp the stem by an 

 ear-shaped base, and the long pods on spreading footstalks, 

 are smooth and waxy, like the leaves of cabbage. This form 

 is abundant in Manitoba and in some parts of Quebec and 

 Ontario. Bird Rape, unlike Wild Mustard, can not be killed 

 by spraying with bluestone solution, on account of its smooth 

 leaves to which the solution will not stick. 



Rocket or Rocket Salad (Eruca sativa Lam.) has recently 

 been introduced into Ontario, probably with European alfalfa 

 seed. It is a hairy annual, somewhat resembling Wild Mustard. 

 The leaves are pinnatifid, with a large terminal lobe. The 

 flowers are yellowish-white, characteristically netted with dark 

 purple veins, aromatic. The pods are shorter than those of 

 Wild Mustard, upright, the beak broad and flat. The seed is 

 about the size of that of Bird Rape, flattened, olive-brown, the 

 miniature root of the germ generally lighter in colour. It is 

 pungent and bitter, with a flavour characteristic of radish. The 

 seed is occasionally present in European alfalfa seed. The plant 

 is seldom referred to as a noxious weed in Europe, where it is 

 sometimes cultivated as a pot herb. It should not be allowed 

 to mature its seeds in cultivated crops. 



HARE'S-EAR MUSTARD (Conringia orientalis (L.) Dumort.). 



Other English names : Rabbit-ear, Hare's-ear Cabbage, 

 Klinkweed. 



Other Latin names: Erysimum orientale R.Br.; Brassica 

 orientalis L. ; Brassica perfoliata Lam. 



Introduced from Europe, probably with flax seed, about 

 1892. Annual and winter annual. Stems erect, with a few 

 branches, 1 to 4 feet high. Whole plant perfectly smooth, and, 

 when young, covered with a fine bloom like that of cabbage. 

 Leaves fleshy, without teeth, the root-leaves obovate, gradually 



