wallflower
1. [ noun ] (botany) any of numerous plants of the genus Erysimum having fragrant yellow or orange or brownish flowers
Related terms: flower Siberian_wall_flower Erysimum
2. [ noun ] (botany) 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
Synonyms: Erysimum_cheiri Cheiranthus_cheiri
Related terms: flower Cheiranthus
3. [ noun ] remains on sidelines at social event
Related terms: shy_person