1. Natural History Museum University of Oslo PO Box 1172 Blindern NO‐0318 Oslo Norway
2. Department of Plant Biology and Biodiversity Management College of Natural Science Addis Ababa University PO Box 3434 Addis Ababa Ethiopia
3. Department of Forest Biology Sokoine University of Agriculture PO Box 3010 Morogoro Tanzania
4. Institute of Resource Assessment University of Dar es Salaam Box 35097 Dar es Salaam Tanzania
5. Department of Forestry Biodiversity and Tourism School of Forestry Geographical and Environmental Sciences Makerere University PO Box 7062 Kampala Uganda
6. Botany Department National Museums of Kenya PO Box 40658 00100 Nairobi Kenya
7. Department of Biology and Environmental Sciences University of Gothenburg PO Box 461 405 30 Gothenburg Sweden