สำนักราชบัณฑิตยสภา

253 Pornpimon WONGSUWAN and Chayan PICHEANSOONTHORN วารสารราชบัณฑิตยสถาน ปีที่ ๓๗ ฉบับที่ ๑ ม.ค.-มี.ค. ๒๕๕๕ Phenology. _ Flowering from June-July, fruiting from July-September. Note. _ This species can be easily distinguished by its lax, few-flowered-or-1-flowered bracts; deeply divided labellum with narrowly oblong lobes and the thoroughly glabrous plant. 14. Hedychium phuluangense Picheans. & Wongsuwan, J. Jpn. Bot. 84: 330-337. 2009 [Type: Thailand: Northeastern, Changwat Loei, Phu Luang Wildlife Sanctuary, N 17 º 16'36.18", E 101 º 31'5.70", alt. 1,474 m, 26 July 2007; Picheansoonthon &Wongsuwan 060, (holotype BKF, isotypes BK, SING). Figure 7. Terrestrial, perennial herb. Pseudostems 1.14-1.56 m high, bladeless sheaths 2-4. Ligule oblong, 1.8-2.1 by 1.2-1.6 cm, apex acute, membranous, pubescent, reddish. Leaves sessile, blade lanceolate-oblong, 42.1-50.3 by 9.8-13.4 cm, base cuneate, apex acute-acuminate, margin entire, both surfaces glabrous. Inflorescence a terminal spike, erect, 11.6-18.2 cm long; peduncle 5.4-10.6 cm long, glabrous; bracts lax, folded, oblong, 2.9-3.1 by 0.8-1.1 cm, apex acute, glabrous, greenish, each subtending a cincinnus of 1 flower; bracteole, oblong, 1.4-1.6 by 0.9-1.1 cm, apex acute, membranous. Flowers white to pale yellow, fragrant; calyx tubular, 2.7-2.8 cm by 3-4 mm, apex 3-lobed, glabrous; corolla tube slender, 5.2-6.1 by 0.2-0.3 cm, 3-lobed, lobes linear, 3.4-4.7 cm by 4-5 mm, apex hooded, yellowish; lateral staminodes oblanceolate-linear, 3.8-4.8 cm by 4-5 mm, base attenuate into a 1.6-1.9 cm by 2-3 mm claw; labellum elliptic, 2.9-3.5 by 1.5-1.6 cm, base attenuate into a 1.1-1.3 cm by 3-4 mm claw, apex bifid, 6-7 mm, white with pale salmon red patch at base; filament 3.3-4.1 cm long, salmon red; anther dorsifixed, 1.5-1.6 cm by 3-4 mm, base divaricate, salmon red; ovary 2-4 by 2-3 mm, 3-loculed, placentation axile, glabrous; epigynous glands 2, slender, 2-3 by ca. 0.5 mm, yellowish; stigma densely ciliate, green. Fruits suborbicular, 1.2-1.6 by 1.2-1.5 cm, glabrous, green. Seeds numerous, ellipsoid to orbicular, 4-5 by ca. 3 mm, reddish orange. Thailand. _ NORTH-EASTERN: Loei [Phu Luang Wildlife Sanctuary]. Distribution. _ Endemic to Thailand. Ecology. _ Lower montane scrub, at the altitude of 1,000-1,500 m.