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Taxonomic Revision of the Genus Hedychium J. König (Zingiberaceae) in Thailand (Part 2) 254 The Journal of the Royal Institute of Thailand Vol. 37 No. 1 Jan.-Mar. 2012 Phenology. _ Flowering from July-August, fruiting from August-September. Vernacular name. _ Hong Hoen ( หงส์เหิน ). 15. Hedychium roxburghii Blume, Enum. Pl. Javae, 1 : 57. 1827 [Type: Indonesia: Java; C.L. Blume s.n. (Type L)]; Miq. Fl. Ind. Bat. 3 : 609. 1854; Horan. Monogr. 26. 1862; K. Schum. in Engl., Bot. Jahrb. 27 : 340. 1899, in Engl., Pflanzenr. 4(46) : 58. 1904; Fl. Java 3 : 64-67. 1968. _ H. spanogheanum Wall., in Hook. J. Bot. Kew Gard. Misc. 5 : 375. 1853. _ Gandasulium roxburghii (Blume) Kuntze, Revis. Gen. Pl. 2 : 690. 1891. _ G. spanogheanum (Wall.), Kuntze, Revis. Gen. Pl. 2 : 690. 1891. _ H. samuiense Sirirugsa & K. Larsen, Nord. J. Bot. 15: 301, Fig. 1 A-D. 1995. [Type : Thailand : Surat Thani, Koh Samui, on rocks in stream through evergreen forest, alt. ca. 100 m, 8 April 1927, Kerr 12540 (holotype K, isotypes AAU, BM, C, L)]. Figures 8, 9A, 9B and 9C. Lithophytic or epiphytic, perennial herb. Pseudostems 50.1-133.5 cm high, leaf sheaths green, bladeless sheaths 1-2. Ligule oblong, 5.7-6.9 by 2.1-3.4 cm, apex obtuse-acute, membranous, pubescent, greenish. Leaves sessile to petiolate, 0.7-2.2 cm; blade oblong, 38.9-49.7 by 8.6-14.2 cm, base cuneate, apex acute, margin slightly undulate, lower surface glabrous. Inflorescence a terminal spike, erect, 10.6-45.2 cm long; peduncle 3.5-9.2 cm long, pubescent; bracts lax, folded, triangular 2.2-2.5 by 1.1-1.4 cm, Figure 7 Hedychium phuluangense Picheans. & Wongsuwan A. Plant habit B. Inflorescence C. Infructescence. Photographed by Pornpimon Wongsuwan.