1. Department of Biological Sciences, Western Michigan University, Kalamazoo, Michigan 49008 USA
2. Department of Organismic and Evolutionary Biology, Harvard University Herbaria, Cambridge, Massachusetts 02138 USA
3. Biology and Environmental Studies Programs, Centre College, Danville, Kentucky 40422 USA
4. National Aeronautics and Space Administration, Washington, D.C. 20546 USA
5. Rimba Ilmu Botanic Garden, Institute of Biological Sciences, University of Malaya 50603 Kuala Lumpur, Malaysia
6. Queen Sirikit Botanic Garden 50180 Chiang Mai, Thailand