erysinum cheiranthoides
Webster's Dictionary (GCIDE)
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. [1913 Webster]
Wormseed mustard, a slender, cruciferous plant (Erysinum cheiranthoides) having small lanceolate leaves. [1913 Webster]