Leaf 200–350 × 3–20 mm, fleshy, channelled, dark green base purplish. Flower stem 200–850 × 1–6 mm, 3–28-flowered. Sterile bracts 1 to 3. Flowers 20–36 mm across (rarely as small as 15 mm across), pale blue to dark blue with darker longitudinal veins, sometimes flushed with pink. Sepals and petals 8–18 × 3–9 mm, concave; labellum smaller than petals. Column 4–6 × 2.5–4 mm, base pale blue, apex purplish black; post-anther lobe hooding anther, nearly semi-circular, 1–1.5 × 2.5–3.5 mm, blackish with yellow crest, toothed, wavy; auxiliary lobes converging, nearly flat, widest at apex, apex yellow, toothed, wavy; column arms converging, flat, obliquely erect, 2–2.7 mm long, tapered; hair-tufts mop-like, dense, white (rarely yellow or purplish), hairs c. 1.1 mm long. Anther near middle of column.
Localised in near-coastal areas; found growing around the margins of seasonally wet swamps or on hummocks within swamps in moist to wet, dark, peaty soil.
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