สำนักราชบัณฑิตยสภา

The Journal of the Royal Institute of Thailand Volume III - 2011 143 Pornpimon Wongsuwan and Chayan Picheansoonthon Epilithic, perennial herb. Pseudostems 0.5-1.4 m high, bladeless sheaths 2-4. Ligule oblong, 1.1-1.2 by 1.2-1.4 cm, apex obtuse-shallowly bilobed, membranous, glabrous or sparely hairy, reddish. Leaves sessile or shortly petiolate 2-4 mm long; blade elliptic, 26.9-27.3 by 8.7-9.4 cm, base cuneate, apex acute, margin entire, both surface glabrous. Inflorescence a terminal spike, erect, 6.1- 6.6 cm long; peduncle 3.5-5.4 cm long, glabrous; bracts imbricate, folded, oblong, 1.9-2.5 by 0.6-1.0 cm, apex acute, glabrous, green, each subtending a cincinnus of 1 flower; bracteole tubular, 1.1-1.2 by 0.3-0.4 cm, apex acute, membranous, glabrous. Flowers white to pale yellow; calyx tubular, 2.4-3.2 by 0.3-0.4 cm, apex acute to 3-dented, glabrous; corolla tube slender, 5.1-5.2 by 0.2-0.3 cm, 3-lobed, lobes linear 5.1-5.7 by 0.3-0.4 cm, apex C Figure 5. 126-149_mac9 5/3/12, 11:28 PM 143