1. Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden Chinese Academy of Sciences Wuhan 430074 China
2. University of Chinese Academy of Sciences Beijing 100049 China
3. Sino‐Africa Joint Research Center Chinese Academy of Sciences Wuhan 430074 China
4. Tanzania Forest Services (TFS) Agency P.O. Box 40832 Dar es Salaam Tanzania
5. East African Herbarium National Museums of Kenya P.O. Box 45166‐00100 Nairobi Kenya