Plants 30-35 cm tall. Rootstock tuberous, cylindric. Stem erect, stout, with 1 or 2 tubular sheaths at base, 4-leaved. Leaves cauline, elliptic to lanceolate, 8-9 × 2.5-3 cm, base clasping, apex subacute. Peduncle with 3-5 bracts; rachis 7-10 cm, densely many flowered; floral bracts lanceolate, 10-20 mm, basal ones exceeding flower, apex acuminate. Flowers green to yellowish green; pedicel and ovary cylindric-fusiform, 11-13 mm. Dorsal sepal erect, forming a hood with petals, ovate, cymbiform, 6-7 × 4-4.5 mm, slightly fleshy, glabrous, 3-veined, apex obtuse; lateral sepals reflexed, narrowly ovate, oblique, 7.5-8 × 3-3.8 mm, slightly fleshy, glabrous, 3-veined, apex subacute. Petals triangular-ovate, oblique, 6-7 × 3-3.2 mm, 1-veined, margin ciliate, apex slightly acute; lip pendulous, linear, 7-10 × ca. 1 mm, entire, apex subobtuse; spur pendulous, cylindric-clavate, 13-20 mm, exceeding ovary, apex obtuse. Column stout; staminodes small; anther locules parallel; connective broad, apex subtruncate; pollinia obovoid, with long caudicles and small, suborbicular viscidium; rostellum deltoid, short; stigma lobes confluent, concave, lying directly below rostellum. Fl. Jun-Jul.
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