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Taxonomic Revision of the Genus Hedychium J. König (Zingiberaceae) in Thailand (Part 2) 256 The Journal of the Royal Institute of Thailand Vol. 37 No. 1 Jan.-Mar. 2012 Inflorescence a terminal spike, cylindrical, erect, ca . 14.5 cm long, hairy; peduncle ca . 5.3 cm long, hairy; bracts imbricate, overlapping, broadly ovate, 5.5-5.6 by 3.7-4.1 cm, apex obtuse-acute, green with brownish, lower half sparsely hairy, each subtending a cincinnus of 1 flower; bracteoles tubular, 5.2-5.4 by 2.1-2.3 cm, apex acute, split on one side to a depth of 1.3-1.5 cm, hairy, greenish. Flowers white; calyx tube slender 4.4-4.6 cm long, apex acute or 2-dented, hairy; corolla tube 9.4-10.5 cm by 3-4 mm, 3-lobed, lobe linear, 4.4-5.4 cm by 4-5 mm, apex hooded, lower half hairy; lateral staminodes narrowly lanceolate-oblong, 3.8-4.5 cm by 5-6 mm. apex emarginate; labellum shorter than staminodes, obovate, 3.2-3.4 by 1.9-2.2 cm, base attenuate into a 0.8-1.2 cm by ca. 3 mm claw, apex bilobed; filament 4.6-5.5 cm long, anthers dorsifixed, 0.9-1 cm long, base divaricate, yellowish; ovary ca. 1.3 cm by 7-8 mm, brownish, hairy; epigynous glands 2, ca . 3 mm long, yellowish; stigma densely ciliate, greenish. Fruits broadly ellipsoid to broadly ovoid, (3.1-) 3.3-4.4 by (1.9-)2.2-2.8 cm, trilobed, hairy, greenish, crowned with persistent calyx. Seeds numerous, oblong ca. 5 by 2-3 mm, reddish aril. Thailand. _ NORTHERN: Tak [Mae Sot]; PENINSULAR: Ranong [Khlong Naka Wildlife Sanctuary, Mueng Chone]. Distribution. _ Peninsular Malaysia, Indonesia (Sumatra). Ecology. _ Tropical evergreen rain forest, at the altitude of ca. 900 m.