1. Department of Plant and Fungal Biology Royal Botanic Gardens Kew Richmond TW9 3AE Surrey UK
2. School of Biological Sciences University of Reading Whiteknights Reading RG6 6AH Berkshire UK
3. Department of Pharmaceutical Botany, Faculty of Pharmacy Mahidol University Ratchathewi Bangkok 10400 Thailand
4. Museo Nacional de Historia Natural, Área Botánica Santiago Chile
5. Donald Danforth Plant Science Center 975 North Warson Road St. Louis 63132 MO USA
6. Tropical Diversity, Royal Botanic Garden Edinburgh Edinburgh EH3 5LR UK
7. School of Geosciences University of Edinburgh Edinburgh EH9 3FF UK