Included here southwestern Dahomey, southern Nigeria, western Cameroon, Equatorial Guinea, most of Gaban and western Congo.
Of the endemic and near endemic vascular plants so far recorded there are about 1950 species in 727 genera and 138 families. There are 8 endemic genera (marked red) but no endemic families. However, Achariaceae is confined to southern Africa, Lepidobotryaceae is confined to tropical Africa and Thomandersiaceae is confined to central and west Africa. The Humiriaceae are exclusively neotropical, except for one species found in tropical West Africa.
Cable, S. & Cheek, M. 1998. The Plants of Mount Cameroon. Royal Botanic Gardens, Kew.
Campbell, D. G. & Hammond, H. D. 1989. Floristic Inventory of Tropical Countries. The New York Botanical Garden.
Tchout, M. G. P., Yemefack, M., De Boer, W. F. De Wilde, J. J. F. E., Van Der Maesen, L. P.J. Cleef, A. M. 2006. Biodiversity hotspots and conservation priorities in the Campo-Ma’an rain forests, Cameroon. Biodiversity and Conservation, 15: 1219-1252.White, F. 1983. The Vegetation of Africa. UNESCO.