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Lip 16.5–20 × 11–15 mm, 3-lobed; side lobes erect, narrowly elliptic; mid-lobe 10–12 × 10 mm, elliptic to suborbicular, rounded; callus of 7 papillose ridges turning to papillae at the base of the mid-lobe; spur 1–3 mm long, conical, recurved.
Flowers not opening wide, creamy-white, the lip with a deep purple blotch on the mid-lobe, with a yellow or cream papillose patch nearer the throat, and sometimes another purple area right at the base of the lip.
Perennating organs subterranean, tuberous, 2.5–4 cm long, 1.5–2.5 cm in diameter, irregularly shaped, forming a chain; roots slender, 1.5 mm in diameter.
Inflorescence densely several-to many-flowered, forming a subspherical head 5–7 cm wide; scape with 2–3 scarious sheaths in the lower half.
Sepals lanceolate, acute, all keeled on the outside; dorsal sepal 19–25 × 7–8 mm; lateral sepals 21–30 × 7–10 mm.
Leaves 1–2, 15–32 cm × 6–11 mm, linear, acuminate, grass-like, just starting to develop at flowering time.
Column slender, arched, 5–8 mm long; foot 1 mm long.
Bracts 15–25 cm long, linear-lanceolate, acuminate.
Petals 18–24 × 5–8 mm, elliptic-lanceolate, acute.
Pedicel and ovary 10–15 mm long, slightly arched.
Terrestrial herb 20–40 cm tall.
Capsule 15–20 mm long, pendent.
