The Collaborative International Dictionary of English v.0.48:

lemonwood \lemonwood\ n.
   1. hard tough elastic wood of the lemonwood tree; used for
      making bows and fishing rods.
      [WordNet 1.5]

   2. A South African evergreen having hard tough wood.

   Syn: lemonwood tree, Psychotria capensis .
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Psychotria capensis
    n 1: South African evergreen having hard tough wood [syn:
         lemonwood, lemon-wood, lemonwood tree, lemon-wood
         tree, Psychotria capensis]