Plants 24-40 cm tall. Tubers oblong, 3-4 × 1-1.5 cm, fleshy. Stem erect, terete, stout, glabrous, with 10-13 ± clustered leaves at base and 5-13 bractlike leaves above. Leaf blade linear to linear-lanceolate, 7-13 × 0.8-1.5 cm, base contracted, apex acuminate or acute.

Raceme many flowered, 11-21 cm; floral bracts lanceolate to ovate-lanceolate, 13-17 mm, apex long acuminate; ovary twisted, cylindric-fusiform, including pedicel 13-15 mm. Flowers fragrant, white. Dorsal sepal forming a hood with petals, erect, elliptic, concave, ca. 5 × 3-3.5 mm, 3-veined, apex obtuse; lateral sepals reflexed, obliquely elliptic, ca. 6 × 2.5-3 mm, 3-veined, apex obtuse. Petals linear, slightly oblique, ca. 5 × 1 mm, 1-veined, apex acute; lip deeply 3-lobed from base; lobes linear, base ca. 0.5 mm wide; lateral lobes spreading nearly at right angles to mid-lobe, 10-11 mm; mid-lobe 7-8 mm, apex obtuse; spur pendulous, slightly curved, cylindric-clavate, ca. 17 mm, longer than ovary, thickened toward end; pollinia obovoid; caudicles slender; viscidia orbicular, small; stigmas clavate. Fl. Sep-Oct.