Leaves 2 or 3, 100–200 × 6–10 mm, folded. Flower stem 150–600 mm, 1–8-flowered. Flowers 20–30 mm across, yellow with brown to red-brown and purple markings, exterior surface of all segments stained or marked with brown; petals yellow stained with brown; dorsal sepal heavily stained with red-brown, commonly with a yellow central area near base; labellum lateral lobes yellow with white then red-brown or purplish tips, midlobe purple; lateral sepals brown with green tips. Dorsal sepal erect, 8–12 × 12–16 mm. Lateral sepals deflexed, crossed and recurved, 14–22 × 2–3 mm. Petals obliquely erect; stalk 3–5 mm long, curved, blackish; blade 12–17 × 8–13 mm. Labellum 7–13 mm long; lateral lobes 9–12 × 5–7 mm; midlobe convex, margins downcurved, broadly wedge-shaped when flattened, 7–13 × 8–11 mm. Callus ridge 1, 4–5 mm long, yellow.
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