The Collaborative International Dictionary of English v.0.48:

Poinciana \Poin`ci*a"na\, n. [NL. Named after M. de Poinci, a
   governor of the French West Indies.] (Bot.)
   A prickly tropical shrub (C[ae]salpinia, formerly Poinciana,
   pulcherrima), with bipinnate leaves, and racemes of showy
   orange-red flowers with long crimson filaments.
   [1913 Webster]

   Note: The genus Poinciana is kept up for three trees of
         Eastern Africa, the Mascarene Islands, and India.
         [1913 Webster]