1. Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Yunnan, China
2. Institute of Botany, University of Basel, Basel, Switzerland
3. School of Biological Sciences, University of Portsmouth, Portsmouth, UK
4. Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK, USA
5. Yunnan Forestry Technological College, China
6. School of Life Science, Yunnan Normal University, Yunnan, China