Erysimum cheiranthoides, the treacle-mustard, wormseed wallflower, or wormseed mustard is a species of Erysimum native to most of central and northern Europe and northern and central Asia. Like other Erysimum species, E. cheiranthoides accumulates two major classes of defensive chemicals, glucosinolates and cardiac glycosides.
It is a herbaceous, annual plant similar in appearance to many other mustards, growing an erect stem 15–100 cm (5.9–39.4 in), (rarely 150 cm) tall. The leaves are lanceolate ...