Leaves 4–7, 100–250 × 1–3.5 mm, straight. Flower stem 150–300 mm, 1–4-flowered. Flowers semi-erect to porrect, 30–40 mm across, pale yellow with tan-brown stripes and stain-like markings on labellum. Dorsal sepal obliquely erect, 11–15 × 7–11 mm, with some short streaks. Lateral sepals obliquely deflexed below labellum, 15–25 × 1.5–4 mm. Petals nearly horizontal; stalk 4–7 mm long, green to brown; blade elliptic, 10–18 × 5–10 mm. Labellum 15–22 mm long; lateral lobes 2–4 × 1–2 mm, minutely papillate, toothed; midlobe broadly ovate, 12–17 × 7–14 mm. Callus ridges 2, 6–8 mm long, irregularly lobed, densely papillate, brown, a third central ridge extending nearly to labellum apex.