Plants up to 30 (-50) cm, with stalked ovate tuberoids. Stem stout, leafy. Leaves 5-7, sessile, largest and crowded in about the middle of stem, orbicular to oblong-lanceolate, acute to acuminate, up to 10 x 4 cm, margin ± undulate. Inflorescence ± dense. Lower bracts foliaceous, the lower exceeding ovary, the upper ± equalling ovary. Flowers greenish-white. Sepals green, the dorsal sub-orbicular-concave, 6x6 mm, lateral sepals obliquely ovate-lanceolate, 10x4 mm. Petals 2-parted nearly to the base, posterior lobe greenish, curved backwards and upwards, linear-lanceolate, sickle-shaped, anterior lobe whitish, filiform, curved backwards, 10-12 mm long, usually slightly longer than posterior. Labellum deeply 3-parted, white at base, lobes subequal, narrow-linear, mid-lobe straight, 12-14 mm long, green towards the apex, side-lobes spreading and curved backwards, slightly variable in length, somewhat shorter than mid-lobe. Spur c.11 mm long, slightly shorter than ovary, inflated towards apex. Column 4-5 mm high; anther canals short, curved upwards; stigmatic processes clavate. Ovary glabrous.

Fl. Per.: July-August.

Type: India: “In India Orientalis supra Montes Punduanas”. Wallich.

Distribution: India, westwards to Kashmir and western Pakistan, at lower altitudes. The flowers, during the night, have a strong and penetrating odour.