1. Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, the Chinese Academy of Sciences, Beijing, China
2. University of Chinese Academy of Sciences, Beijing, China
3. College of Landscape Architecture and Forestry, Qingdao Agricultural University, Qingdao, Shandong, China
4. Department of Ecology & Evolutionary Biology, University of Connecticut, Storrs, CT, USA
5. The Germplasm Bank of Wild Species, Kunming Institute of Botany, the Chinese Academy of Sciences, Kunming, Yunnan, China
6. College of Life Science, Northwest Normal University, Lanzhou, Gansu, China