caesalpinia formerly poinciana pulcherrima

from 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]