Source : Webster's Revised Unabridged Dictionary (1913)

Gourd tree \Gourd" tree"\ (Bot.)
   A tree (the {Crescentia Cujete}, or calabash tree) of the
   West Indies and Central America.

Source : WordNet®

Crescentia cujete
     n : tropical American evergreen that produces large round gourds
         [syn: {calabash}, {calabash tree}]