[1] : The Collaborative International Dictionary of English v.0.48

catalpa \catal"pa\, n. from the language of the indians of
   carolina, where catesby discovered this tree in the year
   1726. bot.
   a genus of american and east indian trees, of which the best
   known species are the catalpa bignonioides, a large,
   ornamental north american tree, with spotted white flowers
   and long cylindrical pods, and the catalpa speciosa, of the
   mississipi valley; -- called also indian bean.
   1913 webster
see also:
catalpa bignonioides catalpa speciosa indian bean 

[2] : WordNet (r) 2.0

catalpa speciosa
     n : catalpa tree of central united states

Catalpa >> C Words
Catalpa, definition of term: Catalpa
catalpa_pag1.html