The Collaborative International Dictionary of English v.0.48:

Bougainvillaea \Bou`gain*vil*l[ae]`a\, prop. n. [Named from
   Bougainville, the French navigator.] (Bot.)
   A genus of plants of the order Nyctoginace[ae], from
   tropical South America, having the flowers surrounded by
   large bracts.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Bougainvillaea
    n 1: ornamental tropical woody vines [syn: genus
         Bougainvillea, Bougainvillaea, genus Bougainvillaea]