Plants 30-40 cm tall. Stem erect, cylindric, to 40 cm, ca. 5 mm in diam., several noded (internodes 3-5 cm), with several tubular sheaths toward base, 4-7-leaved above. Leaves narrowly oblong or oblong, 12-24 × 1.8-4 cm, base contracted and decurrent into sheaths, apex shortly acuminate. Inflorescence solitary, erect or ascending, slender, usually 20-35 cm, densely puberulent; peduncle with 3 or 4 scattered sheaths; rachis 6-14 cm, laxly 6-to more than 10-flowered; floral bracts caducous. Flowers nodding, not opening widely, white to pale yellow, all parts turning orange with age, lip white to pale yellow with a central yellow patch; pedicel and ovary ca. 15 mm. Sepals connivent, similar, ovate-lanceolate, 8-9 × 3.2-4 mm, outer surfaces puberulent, 3-veined, apex acute to shortly acuminate. Petals ovate-oblong, 8-9 × 3-5 mm, glabrous, 3-veined, apex acute; lip spreading, oblong-obovate, 6-8 × 4-5 mm, 3-lobed above middle; lateral lobes erect, oblong, ca. 2 mm, without terminal auricles, apices subtruncate and irregularly incised; mid-lobe transversely oblong, ca. 1.5 × 4-4.5 mm (excluding claw), shortly clawed at base, margin usually strongly undulate, apex slightly emarginate; claw at base of mid-lobe ca. 1 mm; disk with a pair of yellow lamellae and many yellowish brown papillae between them. Column ca. 4 mm. Fl. Oct-Nov. 2n = 40.
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