Plants 21-30 cm tall. Tubers oblong, 1.5-2.5 × 1-1.5 cm, fleshy. Stem erect, pubescent, with 2 nearly opposite leaves at base, and sometimes 1-6 bractlike leaflets above leaves. Leaf blade spreading horizontally, adaxially with yellowish white markings, cordate or ovate, 4-8.5 × 3.5-9 cm, slightly fleshy, base abruptly narrowed and amplexicaul, apex acute. Raceme many flowered, 7-10 cm; rachis pubescent; floral bracts lanceolate, shorter than ovary, ciliate, apex acuminate; ovary twisted, cylindric-fusiform, including pedicel 8-10 mm. Flowers yellowish green. Dorsal sepal erect, broadly ovate, concave, ca. 5 × 3.5 mm, 3-veined, apex obtuse; lateral sepals reflexed, obliquely ovate, ca. 6 × 3 mm, 3-veined, apex obtuse. Petals basally 2-lobed; upper lobe falcate-lanceolate, ca. 6 mm; lower lobe a tooth at base of upper lobe, ca. 0.5 mm; lip spurred at base, near base deeply 3-lobed, lobes linear, ca. 6.5 mm; lateral lobes lanceolate-filiform, slightly narrower than linear mid-lobe; spur pendulous, subclavate, ca. as long as ovary, apex obtuse; pollinia ovoid; viscidia elliptic; stigmas clavate. Fl. Aug.
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