สำนักราชบัณฑิตยสภา

The Journal of the Royal Institute of Thailand Volume III - 2011 131 Pornpimon Wongsuwan and Chayan Picheansoonthon shallowly bilobed, glabrous, reddish. Leaves sessile or petiolate, 4-8 mm long; blade lanceolate-oblong, 13.1-19.9 by 3.0-3.9 cm, base cuneate, apex acuminate, margin entire-slighly undulate, both surface glabrous. Inflorescence a terminal spike, erect, 3.7-5.4 cm long; peduncle 2.2-2.6 cm long, glabrous; bracts folded, lanceolate-oblong, 1.3-1.5 by ca. 0.6 cm, apex acute, glabrous, greenish, each subtending a cincinnus of 1 flower; bracteole tubular, 0.7-0.8 by ca. 0.4 cm, apex acute, membranous, glabrous. Flowers golden yellow; calyx tubular, 0.9-1.0 by 0.2-0.3 cm, apex acute, glabrous; corolla tube slender, 0.9-1.2 by 0.2-0.3 cm, 3-lobed, lobes linear ca. 1.0 by 0.2-0.3 cm, apex hooded, reddish; lateral staminodes oblanceolate, 0.8-1.0 by ca. 0.4 cm; labellum ovate, 0.9-1.1 by 0.7-0.8 cm, apex deeply divided; filament ca. 7 mm long, yellow; anther dorsifixed, ca. 5 mm long, base divaricate, yellow; ovary ca. 2 by 2 mm, 3-loculed, placentation axile, glabrous; epigynous glands 2, slender, ca. 2 by 1 mm, yellowish; stigma densely ciliate, yellow. Fruits subglobose- globose, 1.1-1.5 by 1.1-1.6 cm, glabrous, greenish. Seeds numerus, obovoid- oblong 5-7 by 2-3 mm, cover with reddish aril, globose 0.9-1.3 by 0.7-0.9 cm. Thailand.›NORTHERN: Chiang Mai [Doi Chiang Dao Wildlife Sanctuary]. Distribution.›India (Khasia Hills). Ecology.›Lower montane oak forest or upper montane scrub at the altitude of 1,314-2,084 m. Phenology.›Flowering August-Septembr, fruiting October-November. Vernacular name.›Wan Pad Roi Sanom («à “𷪥√â Õ¬ π¡ ), Ta Hoen Kam ( 쓇À‘ 𧔠). Note.›One of the small Hedychium species with remarkable golden- yellow flowers, 1-flowered bracts, small reddish ligules, and thoroughly glabrous plant. 2. Hedychium biflorum Sirirugsa & K. Larsen, Nord. J. Bot. 15: 303, Fig. 1 J-O. 1995 [Type: Thailand: Tak, Khao Pha Wo, alt. ca. 750 m, 23 July 1973, on limestone hill; Murata et al. T-16946 (holotype L, isotypes AAU, BKF)]. Figures 2 and 4B. Epilithic, perennial herb. Pseudostems 0.7-1.0 m high, bladeless sheaths 2-3. Ligule oblong, 3.4-3.6 by 1.4-1.8 cm, apex rounded or acute, membranous, sparsely hairy, greenish. Leaves sessile; blade elliptic-lanceolate, 43.0-48.0 by 126-149_mac9 4/26/12, 9:15 PM 131