1. Department of Biology, ; Faculty of Science, Srinakharinwirot University, ; Bangkok 10110 Thailand
2. RAMK Herbarium, Faculty of Science, Ramkhamhaeng University,; Bangkok 10140 Thailand
3. Australian National University, Research School of Chemistry, Building 33,; Canberra ACT 0200 Australia
4. Department of Botany, ; The Field Museum, 1400 S. Lake Shore Drive Chicago,; Illinois 60605 U.S.A.