High Quality Content by WIKIPEDIA articles! Okoubaka is a genus of tall forest tree native to west and central tropical Africa. It consists of two species, plus a third species or variety. Its name is from the Anyin language meaning a tree with allelopathic properties, or a tree that causes the death of surrounding vegetation. The tree was once common throughout West Africa and parts of Central Africa, with O. aubrevillei being the primary West African species, and O. michelsonii found in Central Africa.