1. Xishuangbanna Tropical Botanical Garden; Chinese Academy of Sciences; Menglun Township, Mengla County Yunnan Province 666303 China
2. Department of Botany and Zoology; Stellenbosch University; P/Bag X1 Matieland 7602 South Africa
3. Department of Biological Sciences; University of Cape Town; Rondebosch Cape Town 7701 South Africa
4. South African Environmental Observation Network; National Research Foundation; Private Bag X7 Claremont 7735 South Africa