The Collaborative International Dictionary of English v.0.48:

canafistola \canafistola\, canafistula \canafistula\n.
   a deciduous or semi-evergreen tree (Cassia fistula) having
   scented sepia to yellow flowers in drooping racemes and pods
   whose pulp is used medicinally; it grows in tropical Asia,
   Central and South America, and Australia.

   Syn: golden shower tree, drumstick tree, purging cassia,
        pudding pipe tree, canafistola.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

canafistula
    n 1: deciduous or semi-evergreen tree having scented sepia to
         yellow flowers in drooping racemes and pods whose pulp is
         used medicinally; tropical Asia and Central and South
         America and Australia [syn: golden shower tree,
         drumstick tree, purging cassia, pudding pipe tree,
         canafistola, canafistula, Cassia fistula]