1. Department of Botany and Molecular Evolution; Senckenberg Biodiversity and Climate Research Centre (BiK-F); Senckenberganlage 25 60325 Frankfurt am Main Germany
2. Institute of Ecology, Evolution, and Diversity; Goethe University; Max-von-Laue Strasse 13 60438 Frankfurt am Main Germany
3. Department of Primatology; Max Planck Institute for Evolutionary Anthropology; Deutscher Platz 6 04103 Leipzig Germany
4. Conservatoire & Jardin Botanique de la Ville Genève; Ch. de l'Impératrice 1, CP 60 1292 Chambésy Switzerland
5. Cirad-Selmet; Avenue Agropolis 34000 Montpellier France
6. Systematische Botanik; Humboldt-Universität Berlin; Späthstrasse 80/81 12437 Berlin Germany
7. Laboratoire de Biologie et d'Écologie végétales; Université de Ouagadougou; 09 BP 848 Ouagadougou 09 Burkina Faso