Class XV. Order II. 159 



The whole plant is more or less hairy, and attains the height 

 of about two feet. Stem round ; branches given off at a large 

 angle, and curving. Leaves lyrate-runcinate. The fruitful 

 branches are long and slender, covered with close, sessile pods, 

 and ending in yellow flowers. About rubbish and cultivated 

 ground. All summer. Annual. 



199. SINAPIS. 

 SINAPIS NIGRA. L. Common mustard, 



Pods smooth, four cornered, pressed close to 

 the raceme ; upper leaves linear-lanceolate, entire, 

 smooth. Sm. 



Very common in cultivated and waste grounds ; usually re- 

 garded as a weed, though its seeds furnish the common table 

 mustard. Stem round, striated, smooth, three or four feet high, 

 branching. Leaves variously lobed and toothed, the lower ones 

 rough, upper ones smooth, deflexed, the highest narrow, small, 

 entire. Flowers numerous and showy. Calyx and corolla yel- 

 low. Pods erect, close to the stalk, quadrangular, ending in a 

 short beak.-"-June, July. Annual. 



