Leaf 80–200 × 4–12 mm. Flower stem 250–400 mm tall, 1–4-flowered. Flowers 60–80 mm across, creamy white to creamy yellow, occasionally with pink markings; sepals and petals with long, brownish, thread-like tips (no clubs). Dorsal sepal erect, 40–60 × 2–4 mm. Lateral sepals stiffly spreading then drooping, 40–65 × 4–5 mm, divergent. Petals stiffly recurved, 30–50 × 2.5–3 mm, tips drooping. Labellum 15–18 × 7–10 mm, white, sometimes with pinkish markings; margins with numerous spreading teeth to 4 mm long; tip recurved. Calli to 1.5 mm long, white, pink or pale red, in 4 rows nearly to tip. Column 12–15 × 6–8 mm, creamy yellow with pink markings.
Highly localised and consisting of two recognisable variants: (a) flowering September–October with creamy yellow flowers and growing in open forest and woodland in damp soil; (b) flowering October–November with creamy white flowers and growing on margins of winter-wet flats, freshwater lakes and in paperbark Melaleuca forest in wet to inundated sandy loam (plants often growing in shallow water).
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