Plants 350–60 tall. Free part of leaf to 150 x 4–8mm. Spike 50–9 long, 15–35-flowered. Ovary sessile. Flowers crowded, scented, 14–18 x 8–12mm, green to greenish-brown, petals white, labellum white, callus green. Dorsal sepal 8–10 x 3–4mm, incurved to decurved. Lateral sepals free, obliquely erect, divergent, 9–11 x 2.5–2.8mm. Petals 8–10 x 2mm, incurved to spreading, margins irregular, apex blunt. Labellum sessile, oblong to elliptic, 9.5–11 x 4.5–5mm, sharply recurved back on itself near middle, distal margins strongly folded and wavy/crinkled. Callus raised, grooved, ending beyond bend, apex deeply notched, papillate.
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