Plants epiphytic, autotrophic. Pseudobulbs subellipsoid, 6-10 × 2.8-3.3 cm, enclosed in leaf bases. Leaves 5-8, lorate, (30-)60-110 × 2-2.5 cm, leathery, articulate 10-15 cm from base, apex subacuminate. Inflorescence arising from base of pseudobulb, suberect, 50-70 cm, with 7-9 sheaths toward base; sheaths 2.5-12.5 cm; rachis 10-15-flowered; floral bracts lanceolate, 6-20 mm. Flowers slightly scented, 6-7 cm in diam.; pedicel and ovary 40-55 mm, red-brown; sepals and petals yellow-green, tinged pale purple-red, with 9-11 purple-red longitudinal stripes (stripes on petals usually composed of small spots toward base); lip yellow, tinged red-brown along margins, with purple-red striations and irregular dashes on both lateral lobes and mid-lobe; column purple-red at apex, with purple-red spots below. Sepals narrowly elliptic, 55-59 × 18-20 mm, apex acute; lateral sepals slightly oblique, carinate on outer surface. Petals obovate-oblong, slightly falcate, 52-55 × 17-19 mm, apex acute; lip ovate-orbicular in outline, 43-46 mm, base fused to basal margins of column for 3-4 mm, 3-lobed; lateral lobes white ciliate; mid-lobe recurved, ovate, 17-19 × 21-23 mm, margin undulate; disk sparsely hairy along striations on lateral lobes, white pubescent on mid-lobe, with 2 lamellae extending from near base of lip almost to base of mid-lobe; lamellae white hairy. Column arcuate, 36-39 mm, hairy on ventral surface, narrowly winged. Fl. Feb-Mar.
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