Epiphytic herb; stem woody, up to 20 cm long, but usually shorter; roots long, 5–6 mm in diameter.Leaves 3–8, distichous, pendent, 12–30 × 5–8 cm, oblanceolate or obovate, narrowly sheathing at the base, unequally 2-lobed at the apex; the lobes rounded, the longer up to 25 mm long; lamina leathery, dark glossy green.Inflorescences pendent, to 30 cm long, rather laxly 2–7-flowered.Flowers white, set 3–5 cm apart, in 2 rows.Pedicel and ovary 6–8 cm long.Tepals lanceolate-ovate, acuminate.Dorsal sepal erect, 35–50 × 8–12 mm; lateral sepals similar but slightly narrower and somewhat oblique, at first spreading but soon reflexed.Petals similar but slightly shorter.Lip deflexed, 40–45 mm long, 10–14 mm wide in the middle, obovate, then narrowing abruptly into a long, slender tip; spur 20–25 cm long, slender but slightly inflated towards the apex, with a single, loose coil in the middle.Column stout, 6–8 mm long.Capsule 15 × 0.8 cm, cylindrical.