Stems erect, cylindric, to 1 m, stout, 6-8 mm in diam., rigid, unbranched, with many nodes, internodes ca. 3 cm. Leaves alternate along upper part of stem, oblong to oval-lanceolate, 10-15 × 1.5-3 cm, leathery, base with clasping papery sheaths, apex acuminate or unequally bilobed. Inflorescences racemose, on old leafless stems, pendulous, ca. 20 cm, laxly several to more than 10-flowered; peduncle ca. 5 cm; basal sheaths 4, overlapping, cupular; floral bracts oblong, 12-20 × 3-5(or more) mm, leathery, apex obtuse. Pedicel and ovary to 5 cm. Flowers deep yellow [or pink or white with rose tips], disk with a pale purplish brown blotch on either side, column yellow, anther cap purple. Dorsal sepal oblong, 24-35 × 11-14 mm, 6-or 7-veined, apex obtuse; lateral sepals oblong, 24-35 × 9-10(or more) mm, 5-veined, base slightly oblique, apex slightly acute; mentum conic, short and wide, ca. 6 mm. Petals obliquely broadly ovate, 26-35 × 17-23 mm, 7-veined, apex obtuse; lip rounded, slipperlike, ca. 24 × 22 mm, abaxially glabrous, adaxially densely pubescent, margin involute and cucullate. Column ca. 4 mm, foot ca. 4 mm; anther cap conic, adaxially glabrous, front margin irregularly denticulate.
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