1. Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment Inner Mongolia University Hohhot 010000 P.R. China
2. CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 P.R. China
3. Center of Excellence in Phylogeny of Living Organisms, Department of Plant Science, College of Science University of Tehran Tehran 14155‐6455 Iran
4. Royal Botanic Gardens Kew Richmond TW9 3AB United Kingdom
5. Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 P.R. China
6. Department of Biology University of Nebraska‐Kearney Kearney Nebraska 68849 U.S.A.
7. Department of Botany, Faculty of Science Charles University Prague 128 01 Czech Republic
8. Komarov Botanical Institute of the Russia Academy of Sciences Saint‐Petersburg 197376 Russian Federation
9. Institute of Botany, Academy of Sciences of the Republic of Uzbekistan 100047 Tashkent Uzbekistan