1. Key Laboratory of Plant Resources Conservation and Sustainable Utilization; South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou; 510650 Guangdong China
2. Graduate University of the Chinese Academy of Sciences; Beijing 100049 China
3. Laboratory of Forest Ecology and Global Change; School of Life Science, Nanjing University, Nanjing; 210093 Jiangsu China
4. Department of Biology and Burke Museum; University of Washington; Box 355325 Seattle, Washington 98195-5325 U.S.A.
5. Key Laboratory of Biodiversity and Biogeography; Kunming Institute of Botany, the Chinese Academy of Sciences; Kunming 650204 Yunnan China
6. Department of Biological Sciences; Florida International University, and Fairchild Tropical Botanic Garden; Miami, Florida 33199 U.S.A.
7. Department of Environmental and Plant Biology, Ohio University; Athens, Ohio 45701-2979 U.S.A.