Plants 60-70 cm tall. Pseudobulb cylindric, 10-14 × 1.3-1.5 cm, thick, 4-or 5-noded. Leaf 1 or rarely 2, oblong-elliptic or narrowly elliptic-lanceolate, 18-31 × 3.5-9 cm, base cuneate, apex long acuminate; petiole-like base 6-8 cm. Inflorescence ca. 54 cm; rachis ca. 18 cm, densely 10-28-flowered; floral bracts linear-lanceolate, 10-15 mm. Flowers ± pendulous, not opening widely, yellow, narrowly campanulate; pedicel and ovary 7-10 mm. Sepals narrowly oblanceolate, 28-30 × 2-3.5 mm, apex acute or acuminate; lateral sepals slightly oblique. Petals narrowly oblanceolate to linear-oblanceolate, 25-28 × 2-3.5 mm, apex acuminate; lip linear-obovate, 25-28 × 2.5-4 mm (though wider across lobes at apex), 3-lobed near apex; lateral lobes linear to linear-oblong, 4-5 × 1-1.5 mm, apex acute to obtuse; mid-lobe obovate or rhombic-obovate, 6-8 × 3-5 mm, margin ± undulate, apex obtuse; disk with a fleshy callus midway along mid-lobe; callus subglobose, ca. 1.5 mm, smooth. Column 25-28 mm, slender, slightly dilated at apex. Fl. May-Jun.
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