wallflower

Noun

• remains on sidelines at social event

• 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

• any of numerous plants of the genus Erysimum having fragrant yellow or orange or brownish flowers

Related words

• Synonyms: 
  Cheiranthus cheiri , Erysimum cheiri