สำนักราชบัณฑิตยสภา

126 The Journal of the Royal Institute of Thailand Volume III - 2011 126 Taxonomic Revision of the Genus Hedychium J. Ko.. nig (Zingiberaceae) in Thailand (Part I) Taxonomic Revision of the Genus Hedychium J. Ko.. nig (Zingiberaceae) in Thailand (Part I) Pornpimon Wongsuwan 1 and Chayan Picheansoonthon 1,2 1 Faculty of Pharmaceutical Sciences, Khon Kaen University, 2 The Academy of Science, The Royal Institute of Thailand Abstract The genus Hedychium J. Ko.. nig (Zingiberaceae) in Thailand is taxonomically revised, result of which 21 species and 6 varieties are enumerated. One taxon, H. forestii Diels, is recognized here as one of the four varieties of H. coronarium J.Ko.. nig. Key to species and varieties, together with description, ecological data, geographical distributions and illustrations of the first 10 species and 4 varieties (in alphabetical order) are provided. Diagnostic characters of each taxon are also discussed. Key words : taxonomic revision, Zingiberaceae, Hedychium J. Ko.. nig, Thailand INTRODUCTION The genus Hedychium , established in 1783 by J. Ko.. nig, is one of the ethnobotanically and economically important genera of the family Zingiberaceae. Some crude drugs employed in Thai traditional medicine or ethnomedical prescriptions, e.g. Wan Khing Haeng ( «à “π¢‘ ß·Àâ ß ), Wan Pad Roi Sanom ( «à “π ·ª¥√â Õ¬ π¡ ), Wan Chai Dam ( «à “π„®¥” ) are rhizomes obtained from members of the genus Hedychium J. Ko.. nig, (Zingiberaceae). Several taxa, especially those with showy and fragrant flowers, have or may have horticultural potential. Up to now, over 50 species, distributed mainly from eastern Himalayas to south India, south China and Southeast Asia, are recognized. 126-149_mac9 4/26/12, 9:15 PM 126