1. Plant Phylogenetics and Conservation Group, Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Kunming 650223 China
2. University of Chinese Academy of Sciences Beijing 100049 China
3. Center of Conservation Biology, Core Botanical Gardens Chinese Academy of Sciences Mengla 666303 China
4. Australian Centre for Evolutionary Biology and Biodiversity (ACEBB), and Sprigg Geobiology Centre (SGC), School of Biological Sciences The University of Adelaide Adelaide 5005 South Australia Australia