A terrestrial herb 1.5–4 dm. high, glabrous except for the roots.. Tubers ellipsoid, ± 1 cm. long and 0.5 cm. in diameter, ± tomentose.. Stem erect, slender, flexuous, with leaves scattered along its length, terete or angular.. Leaves 4–7, the lowermost sometimes reduced to a sheath, the remainder erect or suberect, linear, acute, the largest 4–10 cm. long and 4–7 mm. broad, the upper ones smaller.. Inflorescence up to 10 cm. long, 2.5–4 cm. in diameter, rather loosely (l-)3–8-flowered.. Bracts leafy, lanceolate, acuminate, 1–2.5 cm. long, the lower ones longer than the pedicel with ovary.. Flowers curving outwards, yellow or scarlet; pedicel with ovary curved, ± 2 cm. long.. Dorsal sepal curved forwards, resembling a sickle from the side, very convex, lanceolate, acuminate, 1.3–1.7 cm. long, ± 6 mm. broad; laterals deflexed, narrowly lanceolate, very acute, 1–1.5 cm. long, ± 2.5 mm. broad.. Petals erect, adherent to the dorsal sepal, linear, acute, 11–15 mm. long, nearly 1.5 mm. broad.. Lip generally curved upwards from just above the base, linear, obtuse, 1–1.4 cm. long, ± 1.5 mm. broad.. Spur dependent, swollen in the apical part, 1.2–1.6 cm. long.. Anther erect, subacute, ± 6 mm. high, canals porrect or slightly curved upwards, ± 4.5 mm. long.. Stigmas horizontal, swollen at the apex, fleshy, ± 3 mm. long.. Rostellum placed in front of the anther, 4.5 mm. high, 3-lobed in the upper half, the middle lobe oblong-lanceolate, acute, 3 mm. long, the side lobes shorter, obliquely triangular, truncate.
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