สำนักราชบัณฑิตยสภา

259 Pornpimon WONGSUWAN and Chayan PICHEANSOONTHORN วารสารราชบัณฑิตยสถาน ปีที่ ๓๗ ฉบับที่ ๑ ม.ค.-มี.ค. ๒๕๕๕ Phenology. _ Flowering in November, fruiting from November-December. Vernacular name. _ Note. _ This species can be easily recognized by its cylindrical, imbricate bract, strictly 1-flowered bract and hairy ovary. 17. Hedychium speciosum Wall. in Roxb., Fl. Ind. 1 : 13. 1820 [Type : India : Silhet, Gomez ; in Wallich Cat. no. 6550 (lectotype K)]; in Pl. As. Rar. 3 : 51. t. 285. 1832; Baker in Hook.f., Fl. Br. Ind. 6: 231. 1894; K. Schum. in Engl., Pflanzenr. 4(46) : 54. 1904. _ H. gardnerianum Wall. in Kew J. Bot. 5: 369. 1853. _ H. gardnerianum var. bitoran Monogr. 25. 1862. _ Gamochilus speciosus (Wall.) Lestib. in Ann. Sc. Nat. 2. ser. 15: 341. 1841. _ Gandasulium speciosus (Wall.) Kuntze, Revis. Gen. Pl. 2 : 690. 1891. Terrestial, perennial herb. Pseudostems 1.1-1.5 m high, bladeless sheaths 2-3. Ligule oblong, 2.4-2.8 by 1.9-2.3 cm, apex obtuse-acute, membranous, hairy, reddish. Leaves sessile or petiolate 1.5-2 cm; blade lanceolate-oblong, 35.7-41.9 by 10.9-11.4 cm, base cuneate, apex acuminate, margin slightly undulate, upper surface glabrous, lower surface hairy along midrib. Inflorescence a terminal spike, erect, 6.6-9.8 cm long; peduncle 3.4-3.7 cm long, glabrous; bracts dented, folded, oblong, 2.5-2.8 by 0.8-1 cm, apex acute, pubescent, greenish, each subtending a cincinnus of 1-2 flowers; bracteole oblong, 1.2-1.5 cm by ca. 8 mm, apex acute, membranous, pubescent, second bracteole oblong, 1-1.2 cm by ca. 4 mm, apex acute, membra- nous, pubescent. Flowers white; calyx tubular, 3.1-3.2 cm by 3-4 mm, apex acute to 2-3-dented, pubescent; corolla tube slender, ca. 4.4 cm by 3 mm, 3-lobed, lobes linear 4.4-4.7 cm by 2-3 mm, apex hooded, yellowish; lateral staminodes oblanceolate, 3.6-3.7 cm by ca. 5 mm; labellum elliptic, 3.7-3.9 by 1.1-1.3 cm, base attenuate into a 7-1 cm by ca. 2 mm claw, apex bifid ca. 9 mm; filament 6-6.3 cm long, yellowish; anther dorsifixed, 1.4-1.6 cm by 3-4 mm, base divaricate, yellow; ovary 3-4 by ca . 2 mm, 3-loculed, placentation axile, hairy; epigynous glands 2, slender, ca. 2 by 1-2 mm yellowish; stigma densely ciliate, green. Fruits subglobose, 1.1-1.3 by ca. 1.2 cm, glabrous, green. Seeds numerous, ellipsoid, 3-4 by ca. 2 mm, aril reddish. Thailand. _ NORTHERN: Chiang Mai [Doi Suthep-Pui National Park, Pang Ku]; Nan [Doi Phu Kha National Park, Phu Wae]. Distribution. _ India (Silhet). Ecology. _ Lower montane scrub, at the altitude of 1,000-1,750 m. Phenology. _ Flowering from JulyAugust, fruiting from August-September. Vernacular name. _