1. Wuhan Botanical Garden; Chinese Academy of Sciences; Wuhan China
2. Sino-Africa Joint Research Center; Chinese Academy of Sciences; Wuhan China
3. Mitrani Department of Desert Ecology; Swiss Institute for Dryland Environmental and Energy Research; Jacob Blaustein Institutes for Desert Research; Ben-Gurion University of the Negev; Midreshet Ben-Gurion; Beer-Sheva Israel
4. East African Herbarium; National Museums of Kenya; Nairobi Kenya