22 COMMON CAKADIAN WILD PLANTS. 



S. SISYIH'BBIDIH, L. HEDGE MUSTARD. 



1. S. Offleina'le, Scop. (Hedge Mustard.) Flowers yel- 

 low, small. Leaves runoinate. 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. (Taijst-Mustaed.) 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, Crautz. Tall, branching. Loosely 

 pubescent below, smooth above. Leaves deeply pinnatifid, 

 the lobes narrowly linear. Pods very long (3^ 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. BES'PERIS, Tourn. Rocket. 

 H. matrona'lis, L. (Garden Bookbt.) Tall, leaves lance- 

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

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



10. BKAS'SICA, Tourn. Cabbage, Mustakd, Etc. 



1. B. Sinapis'tFUm, Bois. (Charlock.) Flowers bright 

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

 hairy. — Too common in our grain fields. 



2. B. ni'gra. (Bi^ck Mustard.) Flowers sulphur-yel- 

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

 Lower leaves lyrate. — Fields and waste places. 



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

 leaves smooth. Lower leaves ovate or elliptical, coarsely 



