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144 The Journal of the Royal Institute of Thailand Volume III - 2011 144 Taxonomic Revision of the Genus Hedychium J. Ko.. nig (Zingiberaceae) in Thailand (Part I) A. H. coronarium J. Knig var. coronarium J. Ko.. nig. B. & C. H. coronarium J. Ko.. nig var. chrysoleucum (Hook.) Baker. D. H. coronarium J. Ko.. nig var. flavescens (Carey ex Roscoe) Baker. E. & F. H. coronarium J. Ko.. nig var. forrestii (Diels) Picheans. & Wongsuwan. Photographed by Pornpimon Wongsuwan. hooded, yellowish; lateral staminodes oblanceolate-linear, 2.8-3.5 by 0.2-0.5 cm; labellum lanceolate with two segments, upper part elliptic, 3.4-3.9 by 0.8-1.2 cm, lower part attenuate into a 1.4-1.7 by ca. 0.2 cm claw, apex acute-emarginate; filament 4.1-5.4 cm long, yellowish; anther dorsifixed, 1.3-1.5 by 0.3-0.4 cm, base divaricate, salmon red; ovary 3-4 by 4-5 mm, 3-loculed, placentation axile, glabrous or sparsely hairy; epigynous glands 2, slender, ca. 2 by 1-2 mm yellowish; stigma densely ciliate, green. Fruits globose, 0.9-1.3 by 0.8-1.2 cm, glabrous, green. Seeds numerus, ellipsoid- globose, 4-5 by ca. 3 mm, aril reddish- orange. Thailand.›NORTHERN: Chiang Mai [Doi Chiang Dao Wildlife Sanctuary, Den Ya Khat; Doi Angkhang; Mae Rim, Pong Yaeng, Mon Long; Doi Suthep, Ban Mae Sah Mai 12, Huay Mae Nai; Doi Pui]; Nan [Doi Phu Kha National Park, Doi Phu Wae]; Pitsanulok [Phu Hin Rong Kla]; NORTH- EASTERN: Loei [Phu Kradueng National Park; Phu Ruea National Park]. Distribution.›Nepal, Bhutan, India, Myanmar and Laos. Ecology.›Common in lower montane scrub, at the altitude of 1,000- 1,474 m. Phenology.›Flowering June-August, fruiting July-September. Vernacular name.›Ta Hoen Wai (쓇À‘ π‰À« ). Note.›This taxon is distributed from the Himalayas to Thailand. It can be easily recognized by its imbricate and glabrous 1-flowered bracts, white lanceolate labellum with acute-emarginate apex and the filament twice as long as the labellum. 7. Hedychium gomezianum Wall., [Cat. no. 6543] in Kew J. Bot. 5: 368. 1853 [Type: Myanmar: Tavoy, Gomez (lectotype K)]; Horan., Prodr. Mono. Scitam.: 25. 1862; Baker in Hook.f., Fl. Br. Ind. 6: 228. 1894; Schum. in Engl., Pflanzenr. 4(46): 55. 1904.› Gandasulium gomezianum (Wall.) Kuntze, Revis. Gen. Pl. 2: 690. 1891. Epiphytic, perennial herb. Pseudostems 0.2-0.9 cm high, leaf sheaths red, bladeless sheaths 3-5. Ligule oblong, 3.3-8.3 by 1.1-1.8 cm, apex acute, membranous, pubescences, reddish or greenish. Leaves sessile or shortly petiolate, 126-149_mac9 4/26/12, 9:15 PM 144