22 COMMON CANADIAN WILD PLANTS. 



8. S1S1M BKIUM, L. HEDGE MUSTARD. 



1. S. Offleina'le, Scop. (HEDGE MUSTARD.) Flowers yel- 

 low, small. Leaves runcinate. Stem 1-2 feet high, with 

 spreading branches. Pods awl-shaped, close pressed to the 

 stem. A very common roadside weed. 



2. S. eanes'eens, Nutt. (TANSY-MUSTAKD.) Flowers yel- 

 lowish, very small. Leaves twice pinnatifid, hoary with 

 short branching hairs, the divisions toothed. Pods acute at 

 each end, shorter than the slender spreading pedicels. 

 N. W. 



3. S. Soph'ia, L. Hoary. Leaves dissected into very 

 numerous small leaflets. Pods very slender, about an inch 

 long, ascending. Scarce. 



4. S. Sinapistrum, Crantz. Tall, branching. Loosely 

 pubescent below, smooth above. Leaves deeply pinnatifid, 

 the lobes narrowly linear. Pods very long (3-4 inches) and 

 slender, spreading. An introduced weed which has now 

 become a pest in the North- West. 



5. S. inei'sum, Engelm., var. Hartwegia'num, Watson, 



has pinnate leaves, the leaflets narrowly oblong and toothed. 

 Pods only one-eighth to one-fourth of an inch -long, in a 

 crowded raceme. N.W. 



9. Hi:s FEKIS, Tourn. ROCKET. 



H. matrona'lis, L. (GARDEN ROCKET.) Tall, leaves lance- 

 olate, acuminate, serrate, usually petiolate. Flowers large, 

 purple. Pods 2-4 inches long, spreading. Waste places. 



10. BRAS' SIC A, Tourn. CABBAGE, MUSTARD, ETC. 



1. B. Sinapis'trum, Bois. (CHARLOCK.) Flowers bright 

 yellow. Stem 1-2 feet high, branching, it and the leaves 

 hairy. Too common in our grain fields. 



2. B. ni'gra. (BLACK MUSTARD.) Flowers sulphur-yel- 

 low. Stem 3-6 feet high, round, smooth and branching. 

 Lower leaves lyrate. Fields and waste places. 



2. B. eampes'tris, L. Stem tall and erect, it and the 

 leaves smooth. Lower leaves ovate or elliptical, coarsely 



