Leaf 250–700 × 5–8 mm. Inflorescence 300–800 mm long, 20–100-flowered. Flowers densely crowded, 3–3.5 × 2.5–3 mm, pale green to yellowish. Dorsal sepal porrect, 3–3.5 × 2.5 mm, strongly hooded, lightly ribbed, tip upcurved. Lateral sepals inrolled, ovate-lanceolate, 2.5–3 × 1 mm. Petals linear, 1.6–2 × 0.6 mm, blunt, erect within dorsal sepal. Labellum porrect at base then recurved, quadrate, 2–2.5 × 1.6–2 mm, margins with numerous cell-clusters, apex shallowly notched. Basal callus of 2 partially fused, dark green mounds; apical callus irregular.
Localised; growing on low mounds and hummocks in clay-based, seasonally-wet flats and swamps surrounded by dense, shrubby forest.
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