สำนักราชบัณฑิตยสภา

261 Pornpimon WONGSUWAN and Chayan PICHEANSOONTHORN วารสารราชบัณฑิตยสถาน ปีที่ ๓๗ ฉบับที่ ๑ ม.ค.-มี.ค. ๒๕๕๕ Thailand. _ NORTHERN: Mae Hong Son [Pai, Doi Kiew Lom; Pai, Doi Phak Kood]; Chiang Mai [Doi Chiang Dao Wildlife Sanctuary]; Chiang Rai [Doi Hua Chang]. Distribution. _ Nepal, Bhutan, India (Sikkim; Nagaland, Zunheboto, Naltoqa), China (Guizhou, Sichuan, Xizang, Yunnan) and Myanmar. Ecology. _ Upper montane scrub or lower montane scrub at the altitude of 900-2,084 m. Phenology. _ Flowering from July-August, fruiting from September-November. Note. _ H. spicatum possesses distinctive filaments shorter than the labella, white flower with pale salmon red patch at base, obovate labellum with deeply divided apex. var. acuminatum (Roscoe) Wall. in Hooker’s J. Bot. Kew Gard. Misc. 5: 328. 1853; T.L. Wu & K. Larsen in Z.L. Wu & PH. Raven, Fl. China 24 : 54. 2000. _ H. acuminatum Roscoe, Monandr. Pl. Scitam. t. 47. 1824 [Type : Kumnon to Sikkim, alt. ca. 2300 m]; _ H. spicatum var. khasianum C.B. Clarke ex Baker. in Hook.f., Fl. Br. Ind. 6: 227. 1894 [Type: India: Khasia Hills; Clarke s.n.]; _ H. spicatum var. trilobum (Wall. ex Roscoe) Wall. in Hooker’s J. Bot. Kew Gard. Misc. 5: 328. 1853; _ H. trilobum Wall. ex Roscoe, Monandr. Pl. Scitam. t. 48. 1826 [Type: Nepal; Wallich s.n.]. Epiphytic, perennial herb. Pseudostems 63.4-86.6 cm high, bladeless sheaths 2-4. Ligule oblong, 1.8-2.1 by 1.2-1.6 cm, apex acute, membranous, pubescent, reddish. Leaves sessile or petiolate, 0.9-1.3 cm long; blade elliptic, 33.1-34.3 by 8.3-8.6 cm, base oblique-cuneate, apex acuminate, margin slighly undulate, both surfaces glabrous. Inflorescence a terminal spike, erect, 11.6-18.2 cm long; peduncle 5.4-10.6 cm long, glabrous; bracts lax, few-flowered, folded, oblong, 1.7-4.2 by 1.1-1.7 cm, apex acute, glabrous, greenish, each subtending a cincinnus of 1 flower; bracteole oblong, 1.3-2.9 cm by 4-6 cm, apex acute, membranous. Flowers white to pale yellow, fragrant; calyx tubular, 3.1-5.8 cm by 4-5 mm, apex acute to 3-lobed, glabrous; corolla tube slender, 5.2-8.6 cm by 2-3 mm, 3-lobed, lobes linear 4-5.6 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 obovate-elliptic, 2.9-3.5 by 1.5-1.5 cm, base attenuate into a 1.1-1.3 cm by 3-4 mm claw, apex deeply divided, 6-7 mm, white with pale salmon red patch at base; filament 3.3-4.1 cm long, salmon red; anther dorsi - fixed, 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, greenish. Seeds numerous, ellipsoid-orbicular, 4-5 by ca . 3 mm, reddish-orange.