1. Royal Botanic Garden Edinburgh; Edinburgh EH3 5LR UK
2. Laboratorio de Botánica y Sistemática; Universidad de los Andes; Bogotá DC Colombia
3. Department of Biological and Environmental Sciences; California University of Pennsylvania; California PA 15419-1394 USA
4. Singapore Botanic Gardens; Singapore 259569 Singapore
5. School of Biological Sciences; University of Hong Kong; Hong Kong P.R. China
6. Biodiversity Research Center; Academia Sinica; Taipei 115 Taiwan