Roots numerous, radiating, flattened, 100–200 × 6–10 mm, grey-green to dark green, roughened. Stems inconspicuous, less than 5 mm long. Racemes 50–150 mm long, thin, rigid, bearing flowers in spasmodic groups. Flowers opening widely, 10–14 × 10–14 mm, crystalline white with yellow labellum. Sepals and petals similar. Dorsal sepal 4–6 × 3–4 mm. Lateral sepals 4–6 × 3–4 mm. Petals 4–5 × 3–4 mm. Labellum c. 2.5 mm long; lateral lobes c. 2 mm long, erect; midlobe c. 1 mm long, fleshy, yellow, densely hairy.
Locally common; growing on trees in swamps, streamside vegetation, mangroves, rainforest margins, and on sheltered ridges and humid slopes.
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