1. Island Ecology and Evolution Research Group, Instituto de Productos Naturales y Agrobiología–Consejo Superior de Investigaciones Científicas (IPNA-CSIC), Tenerife, Canary Islands, Spain
2. Department of Botany, Ecology and Plant Physiology, University of La Laguna, Tenerife, Canary Islands, Spain
3. Department of Botany, Swedish Museum of Natural History, Stockholm, Sweden
4. Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, Connecticut, USA
5. Department of Biology, University of Florida, Gainesville, Florida, USA
6. Life Sciences Department, The Natural History Museum, London, UK
7. Naturalis Biodiversity Center, RA Leiden, The Netherlands
8. Leiden University, Leiden, The Netherlands
9. UMR PVBMT, Université de La Réunion, Saint-Pierre, France
10. WSL Swiss Federal Research Institute, Birmensdorf, Switzerland
11. Royal Alberta Museum, Edmonton, Alberta, Canada
12. Australian National Herbarium, Centre for Australian National Biodiversity Research, Canberra, Australia
13. Department of Biology, Lund University, Ecology Building, Naturvetarvägen, Lund, Sweden
14. Center for Life in Extreme Environments, Portland State University, Portland, Oregon, USA
15. Forest Research Institute, Université du Québec en Abitibi-Témiscamingue, Québec, Canada
16. Biological Sciences, California State University, Los Angeles, California, USA
17. National Institute for Basic Biology, Okazaki, Japan
18. Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
19. Tsitsin Main Botanical Garden of Russian Academy of Sciences, Moscow, Russia
20. Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
21. Faculty of Science and Technology, University of La Rioja, Logroño, La Rioja, Spain
22. Departamento de Biología (Botánica), Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
23. Centro de Investigación en Biodiversidad y Cambio Global, Madrid, Spain
24. Department of Biodiversity, Ecology, and Evolution, Complutense University of Madrid, Madrid, Spain
25. Nees-Institut für Biodiversität der Pflanzen, Rheinische, Friedrich-Wilhelms-Universität, Bonn, Germany
26. University of Freiburg, Freiburg, Germany
27. Department of Plant Biology, Southern Illinois University Carbondale, Illinois, USA
28. Royal Botanic Garden and Domain Trust, Mrs Macquaries Road, Sydney, Australia
29. Department of Plant Biology (Botany), University of Murcia, Murcia, Spain
30. Mittlere Letten 11, Herdwangen-Schoenach, Germany
31. Département de Biologie, Pavillon C.-E. Marchand Université Laval, Québec (Québec), Canada
32. Institute of Botany, University of Liege, Liège, Belgium