Summary
Included here is the Congo Basin, eastern Nigeria, eastern Cameroon and the islands of the Gulf of Guinea (including Annobón, Bioko, Príncipe and São Tomé).
Of the endemic and near endemic vascular plants recorded so far there are about 457 species in 235 genera and 90 families but this number is likely to grow significantly as further information becomes available. Currently there are 12 endemic genera (marked red) listed but there are no endemic families. However, Achariaceae and Huaceae are confined to Africa, and Peridiscaceae has a disjunct distribution with one species occurring in South America and others in West Africa.
References
Adams, C. D. 1957. Observations on the fern flora of Fernando Po. I. A description of the vegetation with particular reference to the Pteridophyta. Journal of Ecology, 45: 479-494.
Brenan, J. P. M. 1978. Some aspects of the phytogeography of tropical Africa. Annals of the Missouri Botanical Garden, 65: 437-474.
Campbell, D. G. & Hammond, H. D. 1989. Floristic Inventory of Tropical Countries. The New York Botanical Garden.
Cheek, M., Onana, J. M., Pollard, B. J., Darbyshire, I. & Csiba, L. 2000. The Plants of Mount Oku and the Ijim Ridge, Cameroon. A Conservation Checklist. Royal Botanic Gardens, Kew.
Cheek, M., Pollard, B. J., Darbyshire, I., Onana, J. M. & Wild, C. 2004. The Plants of Kupe, Mwanenguba and the Bakossi Mountains, Cameroon. A Conservation Checklist. Royal Botanic Gardens, Kew.
Hall, J. B. & Medler, J. A. 1975. The botanical exploration of the Obudu Plateau area. Nigerian Field, 40: 101-115.
Keat, R. W. J. 1955. Montane vegetation and flora in the British Cameroons. Proceedings of the Linnean Society of London, 165: 140-143.
Keay, R. W. J. 1979. A botanical study of the Obudu Plateau and Sonkwala Mountains. Nigerian Field, 1979: 106-119.
Owiunji, I., Nkuuta, D., Kujirakwinja, D. Liengola, I., Plumptre, A., Nsanzurwimo, A., Fawcett, K., Gray. M. & McNeilage. A. (undated). The Biodiversity of the Virunga Volcanoes. Wildlife Conservation Society, Institute of Tropical Forest Conservation, International Gorilla Conservation Programme and others.