Plants 250–500 mm tall. Free part of leaf to 250 × 4–8 mm. Spike 70–120 mm long, 5–25-flowered. Ovary shortly stalked, green, shiny. Flowers moderately crowded, unscented, 14–19 × 8–15 mm, green, petals white and purplish, labellum white, callus green. Dorsal sepal 7.5–12 × 3.5–4.5 mm, decurved. Lateral sepals fused or free, 7.5–12 × 1.5–2 mm, parallel or divergent, base humped. Petals 8–13 × 1.5–3 mm, widely spreading, with purplish central stripe, distal margins crinkly. Labellum sessile, ovate-oblong, recurved back on itself near middle, 8–14 × 4–6 mm, margins finely toothed, strongly wavy/crinkled. Callus ending just beyond labellum bend, apex raised, notched, papillate.
Highly localised; found growing among small shrubs, thick sedges and heath in seasonally wet flats and montane swamps in moist to wet, brown or black peaty loam.
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