Plants epiphytic, autotrophic. Pseudobulbs ellipsoid-ovoid or narrowly ovoid, 5-10 × 3-5 cm, enclosed in leaf bases. Leaves distinctly distichous at base, 6-11, lorate, 70-90 × 2-3 cm, leathery, articulate 8-11 cm from base, apex acuminate. Inflorescence arising from within sheaths at base of pseudobulb, suberect or arching, 65-100 cm, rather slender, with 8-10 sheaths below middle; sheaths to 15 cm; rachis 30-40 cm, usually 8-10-flowered; floral bracts ovate-triangular, 3-5 mm. Flowers 7-8 cm in diam.; pedicel and ovary green, 15-38 mm; sepals and petals yellow-green or olive-green, sometimes with indistinct pale red-brown venation; lip yellow or sometimes cream-white with irregular yellow dashes and spots. Dorsal sepal narrowly obovate-oblong, 40-60 × 13-16 mm, apex acute; lateral sepals narrowly oblong, oblique, 34-50 × 12-15 mm, apex acute. Petals narrowly oblong, falcate, 37-56 × 6-9 mm, apex acute; lip subelliptic, 30-32 × 17-18 mm, base fused to basal margins of column for ca. 3 mm, 3-lobed; lateral lobes erect, subovate, minutely hairy on veins, margins strongly crisped and golden ciliate; mid-lobe recurved, broadly ovate, 8-10 × 8-10 mm, margin strongly crisped; disk sparsely hairy toward base, with 2 central lamellae bearing long hairs 1-3 mm and with a third, shorter row of hairs 1-3 mm between lamellae which merges with 2 other rows on mid-lobe. Column 30-38 mm, wings ca. 1.5 mm wide. Fl. Sep-Dec.
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