Wallflower /(?)/

Wall·flow·er

Wallflower

n.
  1. A perennial, cruciferous plant (Cheiranthus Cheiri), with sweet-scented flowers varying in color from yellow to orange and deep red. In Europe it very common on old walls. (Bot.)
  2. A lady at a ball, who, either from choice, or because not asked to dance, remains a spectator. [Colloq.]
  3. In Australia, the desert poison bush (Gastrolobium grandiflorum); -- called also native wallflower. (Bot.)