Plants 300–50 tall, bright green. Free part of leaf to 150 x 3–5mm. Spike 70–11 long, 15–35-flowered. Ovary shortly stalked, turgid. Flowers well-spaced to crowded, lightly to strongly scented, 9–12 x 6–8mm, green to yellowish-green, petals whitish, labellum white, callus green. Dorsal sepal 5–7 x 2.5–3mm, decurved. Lateral sepals free or fused at base, 5–7 x 1.3–1.8mm, erect to recurved, spreading or parallel. Petals 4–5 x 1mm, incurved to spreading. Labellum sessile, ovate-lanceolate, 4.5–5.5 x 3–3.5mm, sharply recurved near middle, papillate, margins irregularly crinkled and papillate. Callus triangular, densely papillate, extending nearly to labellum apex. Column often with small tongue-like central lobe.
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