Cola laurifolia

References

1. [1]Protabase - Plant Resources of Tropical Africa. — http://www.prota.org ↩︎An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
2. [2]West African Forests and Forestry — Unwin A.H. · T. Fisher Unwin Ltd.; London · 1920 · http://www.biodiversitylibrary.org ↩︎Quite extensive information on some of the trees of West Africa. The book can be downloaded from the Internet