1. Secretary, Department of Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, U.K;, Email: s.knapp@nhm.ac.uk
2. Convener, Botanischer Garten und Botanisches Museum Berlin, Freie Universität Berlin, Königin-Luise-Str. 6–8, 14195 Berlin, Germany
3. Intermountain Herbarium, Utah State University, Logan, Utah 84322-5305, U.S.A
4. Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166-0299, U.S.A.; Department of Science and Education, The Field Museum, 1400 S. Lake Shore Drive, Chicago, Illinois 60605 U.S.A
5. Instituto Nacional de Tecnología Agropecuaría (INTA) and CONICET, Instituto de Recursos Biológicos, Nicolás Repetto y De Los Reseros s/n, Hingham 1686, Buenos Aires, Argentina
6. Harvard University Herbaria, 22 Divinity Avenue, Cambridge, Massachusetts 02138, U.S.A
7. Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166-0299, U.S.A
8. Botanischer Garten und Botanisches Museum Berlin, Freie Universität Berlin, Königin-Luise-Str. 6–8, 14195 Berlin, Germany; Orto botanico di Palermo, Via Lincoln 2, Palermo PA, Italy
9. Chicago Botanic Garden, 1000 Lake Cook Road, Glencoe, Illinois 60022, U.S.A
10. School of Life Sciences, Arizona State University, Tempe, Arizona 85287-4501, U.S.A
11. Wadham College, University of Oxford, U.K.; Universiteit Leiden and Naturalis Biodiversity Center, Leiden, The Netherlands; Department of Biological Sciences, Macquarie University, Sydney, and National Herbarium of New South
Wales, Mrs Macquaries Road, Sydney 2000, Australia
12. Institute of Botany, Slovak Academy of Sciences, 845 23 Bratislava, Slovak Republic; Department of Botany, Faculty of Science, Charles University, Benátská 2, 128 01 Praha 2, Czech Republic
13. Royal Botanic Gardens Victoria, 100 Birdwood Avenue, Melbourne, Victoria 3004, Australia
14. National Plant Data Team, East National Technology Support Center, Natural Resources Conservation Service, United States Department of Agriculture, 2901 East Gate City Blvd., Greensboro, North Carolina 27401, U.S.A
15. Africa & Madagascar Team, SC ID and Naming, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AE, U.K
16. Department of Botany, P.O. Box 77000, Nelson Mandela Metropolitan University, Port Elizabeth, 6031 South Africa; Centre for Functional Ecology, Departamento de Ciências da Vida, Universidade de Coimbra, 3001-455 Coimbra,
Portugal
17. Western Australian Herbarium, Department of Parks and Wildlife, Locked Bag 104, Bentley Delivery Centre, Western Australia 6983, Australia; School of Plant Biology, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, Western
Australia 6009, Australia
18. Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Sciences, 160 Xianhu Rd., Liantang, Luohu, Shenzhen 518004, Guangdong, P.R. China