Plants 17-21 cm tall. Rootstock tuberous, cylindric to ovoid, 0.5-1.5 × 0.3-0.5 cm. Stem erect, with tubular sheaths at base, 5-or 6-leaved. Leaves cauline, oblong-lanceolate, 4-5 × 1-1.5 cm, base clasping, apex acute. Peduncle slender, with several foliaceous, lanceolate bracts; rachis 4-7 cm, laxly 5-9-flowered; floral bracts ovate-lanceolate, 10-25 mm, lower ones exceeding ovary, apex acute. Flowers yellowish green with deep yellow-green petals and a brownish red lip; pedicel and ovary slightly arcuate, cylindric-fusiform, 9-13 mm. Dorsal sepal erect, narrowly triangular-ovate, 5-7 × 2.5-4 mm, 1-veined, apex subacute; lateral sepals reflexed, linear-lanceolate, 6.5-8 × 1.2-1.8 mm, glabrous, 1-veined, apex acute. Petals spreading, lanceolate, falcate, 6.5-7 × 2.2-2.5 mm, glabrous, 1-veined, apex obtuse; lip pendulous, lanceolate, ca. 9 × 1.2 mm, 1-veined, entire, apex acuminate; spur curving upward, cylindric, 11-15 mm, exceeding ovary. Column short; staminodes narrowly oblong; anther locules divergent; connective emarginate at apex; pollinia ellipsoid, with long caudicles and small, ovoid viscidia; rostellum large; stigma lobes confluent, large, concave, lying directly below rostellum. Fl. Jul-Aug.
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