1. Naturalis Biodiversity Center P.O. Box 9517, 2300 RA Leiden the Netherlands
2. Hortus botanicus Leiden, Leiden University P.O. Box 9500, 2300 RA Leiden the Netherlands
3. Institute of Biology Leiden Leiden University P.O. Box 9505, 2300 RA Leiden the Netherlands
4. Botany and N. C. W. Beadle Herbarium School of Environmental and Rural Science, University of New England Armidale NSW 2351 Australia
5. Ghent University, Systematics and Evolutionary Botany lab., K.L. Ledeganckstraat 35 9000 Ghent Belgium
6. Alliance for Conservation Tree Genomics Pha Tad Ke Botanical Garden, P.O. Box 959 06000 Luang Prabang, Lao P.D.R.
7. Division of Ecology & Biodiversity School of Biological Sciences, The University of Hong Kong Pokfulam Road Hong Kong China