1. Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences Northwest University Xi'an 710069 China
2. Germplasm Bank of Wild Species, Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 China
3. University of Chinese Academy of Sciences Beijing 100049 China
4. Biosystematics Group Wageningen University and Research Center Wageningen 6708 PB the Netherlands
5. Department of Biological Sciences Mississippi State University Starkville MS 39762 USA
6. Florida Museum of Natural History University of Florida Gainesville FL 32611 USA
7. Department of Ecology, Evolution, and Environmental Biology Columbia University New York NY 10027 USA
8. Department of Biology University of Florida Gainesville FL 32611 USA