สำนักราชบัณฑิตยสภา

255 Pornpimon WONGSUWAN and Chayan PICHEANSOONTHORN วารสารราชบัณฑิตยสถาน ปีที่ ๓๗ ฉบับที่ ๑ ม.ค.-มี.ค. ๒๕๕๕ apex acute, pilose, green, each subtending a cincinnus of 2-4(-8) flowers; primary bracteole, triangular, 1.5-1.8 by 1.1-1.2 cm, apex acute, membranous, pubescent, yellowish to brownish; second bracteole, triangular, 1.4-1.6 cm by 7-8 mm, apex acute to 2-dentate, membranous, pubescent, yellowish or brownish; third bracteole, triangular, 1.2-1.3 cm by 5-6 mm, apex acute, membranous, pubescent, yellowish or brownish; fourth bracteole, triangular, 0.8-1 cm by 2-4 mm, apex acute, membranous, pubescent, yellowish or brownish. Flowers white to pale yellow, fragrant; calyx tubular, 3.8-5.3 cm by 3-4 mm, apex acute to 3-dentate; corolla tube slender, 6.5-8.3 cm by ca. 3 mm, 3-lobed, lobes linear, 4.7-5.3 cm by 3-4 mm, apex hooded, yellowish; lateral staminodes narrowly lanceolate-oblong or spathulate, 4.8-5.2 cm by 5-8 mm, base attenuate into a 0.6-1.4 cm by 2-3 mm claw; labellum ovate to suborbicular, white with pale greenish patch at base, 4.1-4.3 by 1.9-2.2 cm, base attenuate into ca. 7.5 by 3-4 mm claw, apex 2-cleft, 2.5-2.6 cm; filament 5.2-8.9 cm long, salmon red; anther dorsifixed, 6-8 by 3-4 mm, base divaricate, salmon red; ovary oblong, 3.5-5 by 2-3 mm, 3-loculed, placentation axile, pubescent; epigynous glands 2, slender, ca. 3 by 0.5 mm, yellowish; stigma densely ciliate, green. Fruits obovoid to oblong, 2.8- 3.2 by 1.3-1.5 cm, pubescent, scarlet. Seeds numerous, ellipsoid to oblong, 0.4-1 cm by 4-5 mm, aril reddish. Thailand. _ PENINSULAR: Phang-Nga [Kapong]; Ranong [Khlong Naka Wildlife Sanctuary]; Suratthani [Ko Samui]. Distribution. _ Indonesia (Java). Ecology. _ On rocks or trees near stream in tropical evergreen rain forest, at the altitude of ca. 141 m. Phenology. _ Flowering from April-May, fruiting from May-June. Vernacular name. _ Wan Chai Dam ( ว่านใจด� ำ ) Note. _ The flowers of this plant appear earlier in summer to early rainy season. 16. Hedycium siamense Picheans. & Wongsuwan [Type: Thailand: Ranong, Klong Naka Wildlife Sanctuary, Mueng Chone, N 09° 19.082´, E 98° 30.943´, alt. 943 m, 21 November 2008; Picheansoonthon & Wongsuwan 73, in spirit no. 32 (holotype BKF)]. Figures 9D, 9E and 9CF. Epiphytic, perennial herb with tuberous rhizomes. Pseudostems 48-81 cm high, leaf sheaths green, bladeless sheaths 1-2. Ligule oblong, 5.7-6.4 by 2.2-2.8 cm, apex acute-acuminate, membranous, glabrous, pale greenish. Leaves elliptic-lanceolate, 22.2-27.5 by 9.9-10.5 cm, base cuneate, apex acute to shortly acuminate, margin slightly undulate, both surfaces glabrous.