Terrestrial herb 35–85 cm tall.Perennating organs subterranean, 2–3.5 cm long, 1–2.5 cm high, conical-ovoid, forming chains.Roots white, 1.5 mm in diameter.Leaves 3–5, forming a fan or tuft, 20–55 × 0.8–1.6(4.5) cm, linear-lanceolate to lanceolate, ribbed, well developed at flowering time.Inflorescence laxly up to 9-flowered; peduncle almost covered by 4–5 sheaths up to 6.5 cm long.Sepals and petals green or greenish-brown; lip purple or green or dull yellow at base, the mid-lobe deep pink or mauve.Pedicel and ovary 15–21 mm long; bracts spreading, 6–35 mm long, lanceolate, acuminate.Dorsal sepal 9–12 × 2–3 mm, linear-lanceolate, acute; lateral sepals 9–17 × 2–5 mm, oblanceolate, acute, oblique.Petals 8–12 × 2.5–5 mm, narrowly elliptic, acute.Lip 9–15 × 6–10 mm, 3-lobed in apical third; side lobes erect, oblong, rounded; mid-lobe 3–5 × 3–4 mm, oblong-flabellate, rounded or truncate; callus of 3 fleshy ridges in basal half of lip and several rows of papillae on the mid-lobe.Spur 1.5–3 mm long, cylindrical, incurved.Column 4–6 mm long, with a foot 2 mm long.Capsule c. 25 mm long, pendent.
