Plants 220–650 mm tall. Free part of leaf to 200 × 3–6 mm. Spike 60–120 mm long, 10–25-flowered. Ovary sessile, green. Flowers moderately crowded, lightly scented, 10–13 × 9–11 mm, greenish brown to brownish, labellum white, callus bright green to yellowish green. Dorsal sepal 7–8.5 × 3–3.5 mm, decurved to recurved. Lateral sepals free, 9–10.5 × 2.3–2.8 mm, widely divergent, apex darker, horn-like. Petals 7–8.5 × c. 2 mm, porrect to spreading. Labellum sessile, ovate to broadly ovate-lanceolate, recurved sharply above middle, 6.5–7 × 4.5–5 mm, distal margins weakly wavy/crinkled, minutely papillate. Callus broad, bright green, fleshy, extending nearly to labellum bend, channelled at base with 2 flanking ridges, apex shallowly notched and papillate.
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