The Collaborative International Dictionary of English v.0.48:

Acokanthera \Acokanthera\ n.
   1. small genus of trees and shrubs containing strongly toxic
      cardiac glycosides; distributed from Arabia to Africa.

   Syn: Acocanthera, genus Acocanthera, genus Acokanthera
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Acokanthera
    n 1: small genus of trees and shrubs containing strongly toxic
         cardiac glycosides; Arabia to Africa [syn: Acocanthera,
         genus Acocanthera, Acokanthera, genus Acokanthera]