The Collaborative International Dictionary of English v.0.48:

browallia \browallia\ n.
   any of several herbs of the genus Browallia cultivated for
   their blue or violet or white flowers.

   Syn: bush violet.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

browallia
    n 1: any of several herbs of the genus Browallia cultivated for
         their blue or violet or white flowers [syn: bush violet,
         browallia]