and Chayan Picheansoonthon1,2
1 Faculty of Pharmaceutical Sciences, Khon Kaen University,
2 The Academy of Science, The Royal Institute of Thailand
The genus Hedychium J. Koönig (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