Leaves 2 or 3, 100–150 × 7–10 mm, folded. Flower stem 250–400 mm tall, 1–7-flowered. Flowers 25–35 mm across, pale yellow to yellow with red to red-brown markings, exterior surface of all segments stained or marked with red-brown; petals yellowish brown, dorsal sepal heavily stained with red-brown, commonly with a yellowish central area, labellum lobes heavily marked and stained with red or red-brown, lateral sepals brown with green tips. Dorsal sepal erect, 6–10 × 9–14 mm. Lateral sepals deflexed, crossed and recurved, 14–20 × 2–3 mm. Petals obliquely erect; stalk 3–7 mm long, curved, blackish; blade ovate, 10–18 × 8–12 mm. Labellum 7–10 mm long; lateral lobes 7–10 × 4–6 mm; midlobe convex, margins downcurved, broadly wedge-shaped when flattened, 7–10 × 7–9 mm. Callus ridge 1, 3–4 mm long, yellow.
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