The Collaborative International Dictionary of English v.0.48:

Wallaba \Wal"la*ba\, n. (Bot.)
   A leguminous tree (Eperua falcata) of Demerara, with
   pinnate leaves and clusters of red flowers. The reddish brown
   wood is used for palings and shingles. --J. Smith (Dict.
   Econ. Plants).
   [1913 Webster]