Plants epiphytic or lithophytic, autotrophic. Pseudobulbs narrowly ovoid, 6-8 × 3-4 cm, bilaterally flattened. Leaves 10-13, distichous, lorate, 52-75 × 1.2-1.7 cm, articulate 6-9 cm from base, apex obliquely bilobed. Inflorescence arising from leaf axils, arching, 35-41 cm; peduncle with 3-5 sheaths 4-11 cm; rachis 16-21 cm, 3-7-flowered; floral bracts triangular, 4-6 × 4-5 mm. Flowers scented, 10-11 cm in diam.; pedicel and ovary 45-55 mm, yellowish green; sepals and petals pale green-yellow or cream-yellow, with purplish red venation or occasionally tinged purplish red; lip yellowish white, with minute purplish red spots and dashes at base and a purplish red patch near apical margins of lateral lobes, and with a purplish red, V-shaped patch and a narrow longitudinal line on mid-lobe; column yellowish white, with irregular purplish red spots and dashes on ventral surface. Sepals narrowly elliptic, 65-71 × 18-20 mm, margins slightly recurved, apex acute; lateral sepals slightly falcate. Petals falcate, narrowly oblong, 63-65 × 9-10 mm, apex acute; lip ovate, 50-55 mm, base fused to basal margins of column for ca. 6 mm, 3-lobed; lateral lobes 35-38 × 12-13 mm; mid-lobe subcordate-ovate, 19-20 × 17-19 mm, margin undulate; disk puberulent, with 2 lamellae; lamellae 13-14 mm, densely white pubescent. Column ca. 40 mm, winged. Fl. Feb-Mar.
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