สำนักราชบัณฑิตยสภา

The Journal of the Royal Institute of Thailand Volume III - 2011 135 Pornpimon Wongsuwan and Chayan Picheansoonthon Distribution.›Sri Lanka, Nepal, Bhutan, India (Sikkim), China (Southern Yunnan, Guangxi), Myanmar and Laos. Ecology.›Lower montane pine-oak forest or lower montane scrub, at the altitude of ca. 1,000 m. Phenology.›Flowering June-August, fruiting July-September. Vernacular name.›Kha Phai ( ¢à “‰ø ), Za-ae Zaekaw (´–‡Õ‡´°à Õ) (Mae Hong Son). Note.›This species possesses some distinctive characters of non- membranous ligules, oblong leaves and remarkably reddish-orange flowers, and can be readily differentiated from the typical Hedychium species bearing membranous ligules and white to yellowish flowers. 4. Hedychium collinum Ridl., J. Straits Branch Roy. Asiat. Soc. 32: 103. 1899 [Type: Peninsular Malaysia: Kedah, Kedah peak, alt. 1,300 m, June 1893; Ridley s.n. (type K)]; K. Schum. in Engl., Pflanzenr. 4(46): 50. 1904; Ridl., Fl. Mal. Pen. 4: 241. 1924; Holtt. in Gard. Bull. Sing. 13: 75. 1950.› H. paludosum M.R.Hend. ( syn. nov. ), J. Malayan Brach. Roy. Asiat. Soc. 5: 273. 1927; Holtt. in Gard. Bull. Sing. 13: 77. 1950 [Type: Peninsular Malaysia: Pahang, Cameron Highlands, alt. ca. 1,500 m; leg. Henderson S.F.N. 17844]. Figures 3 and 4C. Terrestrial or lithophytic, perennial herb. Pseudostems up to 1.1 m high, bladeless sheaths 2-4. Ligule oblong, 1.9-2.5 by 1.4-2.0 cm, apex obtuse- acute or bilobed, membranous, glabrous. Leaves sessile or shortly petiolate, 4- 6 mm long; blade narrowly elliptic to lanceolate-oblong, 19.2-25.9 by 6.0-6.8 cm, base rounded or cuneate, apex acute-acuminate, margin entire, upper surface glabrous, lower surface glaucus. Inflorescence a terminal spike, erect, up to 22.5 cm long, hairy; peduncle ca. 6.6 cm long, hairy; bracts lax, folded, triangular, 2.9-3.5 by 1.4-1.7 cm, pubescent, greenish, each subtending a cincinnus of 3-4 flowers, apex acute; first bracteole greenish, tubular, 2.6-3.0 by 1.3-1.5 cm, apex acute, pubescent; second bracteole tubular, 2.3-2.5 by 1-1.2 cm, apex acute, pubescent; third bracteole, tubular, membranous, 1.8-2.2 by 0.8›0.9 cm, pubescent. Flowers white; calyx tubular, 3.4-4.4 by 0.3-0.4 cm, apex acute, hairy; corolla tube slender, 5.2-8.1 by 0.2-0.3 cm, 3-lobed, lobes linear, apex hooded, yellowish, 3.4-3.8 by 0.2-0.3 cm; lateral staminodes oblong, 3.3-3.9 by 0.3-0.5 cm; labellum obovate, 2.6-3.1 by 2.3-2.9 cm, base attenuate into a 3-6 by ca. 4 mm claw, apex deeply cleft, white; filament salmon red, 5.0-6.1 cm long; anther dorsifixed, 3-5 by 3-4 mm, base divaricate, salmon red; stigma densely ciliate, green. Thailand.›PENINSULAR: Yala [cultivated from plants collected at Khuean Banglang]. 126-149_mac9 4/26/12, 9:15 PM 135