Slender terrestrial herb 20–50 cm tall; tubers 2–3 × 1 cm, ellipsoid.Leaves 3–6, the lowermost 1–2 sheathing, the mid-stem leaves clasping the stem, 3–6.5 × 1–2 cm, lanceolate, acute; the upper ones bract-like.Inflorescence to 12 × 6.5 cm, densely few to several-flowered; bracts leafy, 1.5–3.5 cm long.Flowers sweetly scented, sepals green, petals and lip whitish-green.Pedicel and ovary c. 2.5 cm long, somewhat curved.Dorsal sepal erect, 11–15 × 5.5–8 mm, lanceolate or ovate, acute, convex; lateral sepals spreading and curving up, 12.5–19.5 × 7–9 mm, obliquely lanceolate, acute.Petals divided almost to base, both lobes erect; upper lobe 9.5–13 × 1–2 mm, ligulate, curved; lower lobe 5.5–11 × 1–2 mm, linear or ligulate, very fleshy.Lip velvety-papillose, 3-lobed with an undivided base 1–3.5 mm long; mid-lobe 14–27 × 4.5–7 mm, oblong-lanceolate, acute; side lobes diverging, 10–16 × 2.5–5.5 mm, oblanceolate; spur 12–15 mm long, pendent, swollen to c. 3 mm diameter at apex.Anther erect, 5–6.5 mm high; canals 3.5–5 mm long, porrect.Stigmatic arms 4.5–6.5 mm long, porrect, enlarged and truncate at the tips.Rostellum mid-lobe c. 2 mm long, triangular.