1. Plant Systematics and Ecology Laboratory, Higher Teachers’ Training College University of Yaoundé I P.O. Box 047 Yaoundé Cameroon
2. Herbarium et Bibliothèque de Botanique africaine Université Libre de Bruxelles campus de la Plaine, boulevard du Triomphe, C.P. 265 Brussels 1050 Belgium
3. AMAP Lab, Univ Montpellier IRD, CNRS, INRAE, CIRAD Montpellier France
4. Missouri Botanical Garden Africa & Madagascar Department P.O. Box 299 St. Louis Missouri 63110 U.S.A.
5. Evolutionary Biology and Ecology, Faculté des Sciences, C.P. 160/12 Université Libre de Bruxelles 50 Avenue F. Roosevelt Brussels 1050 Belgium
6. Plant Ecology and Biogeochemistry Université Libre de Bruxelles campus de la Plaine, boulevard du Triomphe, C.P. 244 Brussels 1050 Belgium
7. Cullman Program for Molecular Systematics New York Botanical Garden Bronx New York 10458‐5126 U.S.A.
8. Ph.D. Program in Biology, Graduate Center City University of New York 365 5th Ave New York New York 10016 U.S.A.
9. Botanic Garden Meise Domein van Bouchout Nieuwelaan 38, 1860 Meise Belgium