Plants epiphytic or lithophytic, autotrophic. Pseudobulbs stemlike, usually 10–30 cm, sometimes to 1 m, growing indeterminately, completely enclosed in distichous leaf bases, rooting from basal part, occasionally producing a small plant at base.

  Leaves several to many, sometimes to 15–17 or more, lorate, 24–75 × 1.1–1.7(–2.5) cm, subleathery, articulate 3– 6(–10) cm from base, apex unequally 2-lobed, with a mucro in sinus.

 Inflorescences 1 or 2, arising from leaf axils, suberect, 25–45 cm, 2–5- or more flowered; floral bracts triangular, 2–5 mm. Flowers almond-scented, usually not opening widely, 6– 6.5 cm in diam.; pedicel and ovary 40–50 mm; sepals and petals white, tinged pink on outer surfaces; lip white with a central yellow patch at base of mid-lobe, lamellae yellow and occasionally with scattered purplish red spots. Sepals narrowly elliptic or broadly lanceolate-oblong, concave, 45–55(–60) × 10–15(–20) mm, apex acute. Petals broadly linear, 42–50 × 7– 10 mm, apex acute; lip oblong-ovate, 40–45 mm, base fused to basal margins of column for 3–4 mm, 3-lobed; lateral lobes erect and loosely clasping column, ca. 8 mm wide; mid-lobe ovate, small, ca. 11 × 11 mm, margin undulate; disk puberulent and with a densely hairy patch at center of mid-lobe, with 2 longitudinal lamellae; lamellae convergent at their apices. Column ca. 35 mm; pollinia 2. Capsule fusiform-ellipsoid, ca. 40 × 25 mm.

 Fl. Oct–Dec, fr. Feb–Apr. 2n = 40.