1. Nees Institute for Biodiversity of Plants University of Bonn Bonn Germany
2. Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences Guilin China
3. Understanding Evolution Research Group Naturalis Biodiversity Centre Leiden The Netherlands
4. Institute of Biology Leiden, Faculty of Science Leiden University Leiden The Netherlands
5. Cibodas Botanic Garden National Research and Innovation Agency (BRIN) Bandung Indonesia
6. Division of Biological Sciences, Faculty of Science Prince of Songkla University Hat Yai Thailand
7. Singapore Botanic Gardens National Parks Board Singapore Republic of Singapore
8. Systematic and Evolutionary Botany University of Zurich Zurich Switzerland