1. State Key Laboratory of Herbage Improvement and Grassland Agro‐Ecosystems College of Pastoral Agriculture Science and Technology, Lanzhou University Lanzhou China
2. Institute of Ecology, College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University Beijing China
3. Wuhan Botanical Garden Chinese Academy of Sciences Wuhan China
4. Royal Botanic Gardens Kew Wellcome Trust Millennium Building Wakehurst UK
5. State Key Laboratory of Herbage Improvement and Grassland Agro‐Ecosystems College of Ecology, Lanzhou University Lanzhou China