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The Journal of the Royal Institute of Thailand Volume III - 2011 149 Pornpimon Wongsuwan and Chayan Picheansoonthon of the Ministry of Public Health. The author would like to thank staffs of BK, BKF, QBG, PSU, K, P, CAL and SING for herbarium accesses and to staffs of our research unit: Mr. Chalermchoke Boonchit, Mr. Supachai Koonterm, Mr. Jeeradej Mayoe, Mr. Piyapong Yupparach, for field assistance. REFERENCES Larsen K, Larsen, SS. 2006. Gingers of Thailand. Chiang Mai: Queen Sirikit Botanic Garden. Chiang Mai. pp. 68-74, 165. Picheansoonthon C, Mokkamul, P. 2005. Two new species of Hedychium Koenig (Zingiberaceae) from Thailand. Folia malaysiana 6 (1&2): 17-26. Picheansoonthon C, Wongsuwan, P. 2008. Note on the genus Hedychium J. Knig (Zingiberaceae) in Thailand. J. Roy. Inst. Thail. 43 (3): 237-252. Picheansoonthon C, Wongsuwan, P. 2009. Two new species of Hedychium (Zingiberaceae) from Thailand. J. Jpn. Bot. 84: 330-337. Sirirugsa P, Larsen, K. 1995. The genus Hedychium (Zingiberaceae) in Thailand. Nord. J. Bot. 15(3): 301-304. Wongsuwan P, 2010. Taxonomy and molecular study of genus Hedychium (family Zingiberaceae) in Thailand. M.S. thesis, The Graduate School, Khon Kaen University. Khon Kaen. pp.175. 126-149_mac9 4/26/12, 9:15 PM 149