| erysimum | (n) large genus of annual or perennial herbs some grown for their flowers and some for their attractive evergreen leaves; Old World and North America, Syn. genus Erysimum |
| siberian wall flower | (n) showy erect biennial or short-lived perennial cultivated for its terminal racemes of orange-yellow flowers; sometimes placed in genus Cheiranthus, Syn. Cheiranthus allionii, Erysimum allionii |
| wallflower | (n) perennial of southern Europe having clusters of fragrant flowers of all colors especially yellow and orange; often naturalized on old walls or cliffs; sometimes placed in genus Erysimum, Syn. Cheiranthus cheiri, Erysimum cheiri |
| western wall flower | (n) biennial or short-lived perennial prairie rocket having orange-yellow flowers; western North America to Minnesota and Kansas; sometimes placed in genus Cheiranthus, Syn. Erysimum asperum, Cheiranthus asperus, Erysimum arkansanum |
| wormseed mustard | (n) slender yellow-flowered European mustard often troublesome as a weed; formerly used as an anthelmintic, Syn. Erysimum cheiranthoides |
| Erysimum | n. a large genus of annual or perennial herbs of the Old World and North America; some are grown for their flowers and some for their attractive evergreen leaves. |