1. School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK.
2. Royal Botanic Gardens, Kew, Richmond, Surrey, UK.
3. UN Environment Programme World Conservation Monitoring Centre, Cambridge, UK.
4. New York Botanical Garden, New York, NY, USA.
5. Department of Systematic and Evolutionary Botany, University of Zurich, Zurich, Switzerland.
6. Global Center for Species Survival, Indianapolis Zoo, Indianapolis, IN, USA.
7. International Union for Conservation of Nature Species Survival Commission, Gland, Switzerland.
8. Herbarium, School of Biological Sciences, University of Reading, Whiteknights, UK.
9. Department for Environment, Food and Rural Affairs, Lancaster, UK.
10. Botanic Gardens Conservation International, Richmond, UK.
11. Wageningen University and Research, Wageningen, Netherlands.
12. Royal Botanic Gardens, Kew, Wakehurst, Ardingly, UK.
13. Department of Geography, Royal Holloway, University of London, Egham, UK.
14. Institute of Archaeology, University College London, London, UK.
15. Naturalis Biodiversity Center, Leiden, Netherlands.
16. Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy.
17. Gothenburg Global Biodiversity Centre, Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden.
18. Department of Biology, University of Oxford, Oxford, UK.