Plants 100–200 mm tall, slender, wiry. Leaf 80–200 × 2–3 mm. Inflorescence 100–250 mm long, 10–20-flowered. Flowers widely spaced, 2–2.5 × 1 mm, pale green, to yellowish, scented. Dorsal sepal porrect to obliquely erect, 2.2–2.5 × 1.5–2 mm, shortly pointed. Lateral sepals narrowly lanceolate, tapered to a blunt point, 2–2.5 × 0.8 mm, backswept, clasping ovary. Petals linear, 1.3–1.5 × 0.4 mm, erect, curved, partly enclosed within dorsal sepal or spreading. Labellum held away from ovary, porrect at base then downcurved, oblong, 2–2.5 × 1 mm, margins flat, constricted below middle; apex bluntly truncate. Basal callus dark green, saddle-shaped; apical callus minute.
Highly localised; forming colonies among heath, rushes and sedges in peat bogs, usually close to running water.
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