Three tribes, 12 genera and 60 species are found in Nong Khai and Bueng Kan Provinces. Alpinia Roxb., Curcuma L., Kaempferia L. and Zingiber Mill. are the most diverse genera with 10, 9, 9 and 9 species, respectively. Alpinia macrostaminodia A.Chaveer. & Sudmoon, Elettariopsis biphylla Saensouk & P.Saensouk, E. monophylla Loes, Monolophus jirawongsei (Picheans. & Mokkamul) Veldkamp & Mood, M. phutokensis (Picheans.) Veldkamp & Mood, M. phuwoaensis (Picheans. & Koonterm) Veldkamp & Mood, M. phulangkaensis (Picheans.) Veldkamp & Mood and Kaempferia siamensis Sirirugsa rare species which are recorded in the IUCN Red List, Thailand Red Data: Plants and evaluation criteria of Saensouk (2011). One species, Elettariopsis biphylla is endemic species in Thailand. A key to genera, distribution data and ecological data, vernacular name, species status and traditional uses are provided. In both provinces, the Zingiberaceae are used traditionally as foods, spices, medicines, ornamental plants and in rituals.
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