This common and annoying plant was introduced into this country from Europe, and is becoming widely distributed as a weed in grain fields and waste margins about cultivated lands, where progressive farmers attack it with an everlasting determination to suppress it. It grows from one to two feet high, and branches at the top. It is covered with numerous stiff, scattered hairs. The plant is coarse in structure, and is rather scrawly in appearance. The alternating leaves are similar to those of the Black Mustard, but they are not so much divided. They are rough to the touch, coarse and prominently ribbed and veined, and often their edges are notched and wavy. The flowers are a trifle longer than the Black species, and are more sparse. The sepals spread as the flower expands. The pods are usually smooth, but knotty.