What is "wormseed mustard"

Wormseed \Worm"seed`\, n. (Bot.) Any one of several plants, as Artemisia santonica, and Chenopodium anthelminticum, whose seeds have the property of expelling worms from the stomach and intestines.

Wormseed mustard, a slender, cruciferous plant ( Erysinum cheiranthoides) having small lanceolate leaves.

n. slender yellow-flowered European mustard often troublesome as a weed; formerly used as an anthelmintic [syn: Erysimum cheiranthoides]