Plants epiphytic, autotrophic. Pseudobulbs subovoid, bilaterally flattened, 4-8 × 2.5-3.6 cm, enclosed in leaf bases. 

Leaves 13-18, lorate, 30-75 × 0.9-1.4 cm, leathery, articulate 5-12 cm from base, apex acuminate and unlobed. 

Inflorescence arising from leaf axils, arching, 40-60 cm; peduncle with several sheaths; rachis laxly 18-22-flowered; floral bracts triangular, 2-3 mm. Flowers scented, opening widely, 5-6 cm in diam.; pedicel and ovary 22-27 mm; sepals and petals cream-yellow with pale purple-red venation composed of many small spots; lip cream-yellow with pale purple-red striations on lateral lobes and a purple-red, V-shaped patch and short longitudinal line of same color on mid-lobe, lamellae yellowish with purple-red spots. Sepals narrowly obovate-oblong, slightly concave, 43-46 × ca. 10 mm, apex acute; lateral sepals slightly oblique. Petals falcate, broadly linear, 42-44 × 7-9 mm, apex acute; lip elliptic-obovate, 35-38 mm, base fused to basal margins of column for 2-3 mm, 3-lobed; lateral lobes erect and clasping column; mid-lobe subcordate or broadly ovate, 9-11 × 9-11 mm, margin undulate; disk minutely hairy, with 2 lamellae; lamellae extending to near base of mid-lobe, hairy, convergent and sometimes fusing with each other at their apices. Column 30-32 mm, winged, hairy on ventral surface. Fl. Oct-Nov.