D defs.my
Entry 3 senses Webster, 1913

Wallflower

/wôl'-flouˌ-ẽr/ · Wall·flow·er · IPA /ˈwɔlˌflaʊ.ɚ/
01 n. A perennial, cruciferous plant (Cheiranthus Cheiri), with sweet-scented flowers varying in color from yellow to orange and deep red. In Eur…
  1. 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. 2.
    A lady at a ball, who, either from choice, or because not asked to dance, remains a spectator.[Colloq.]
  3. 3.
    In Australia, the desert poison bush (Gastrolobium grandiflorum); -- called also native wallflower.(Bot.) Also: native wallflower