Bibliography for Tropical Africa :
- Exell, A. & Wild, H. (1963). Flora Zambesiaca: Mozambique, Federation of Rhodesia and Nyasaland, Bechuanaland Protectorate. London Kew 2(1):
Bibliography other :
- Fl. Trop. E. Africa Erythrox.: 1-10 (1984)
- Fl. Ethiopia & Eritrea 2(2): 264 (1995)
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