Leaves 50–60 × 14–16 mm, margins wavy. Flower stem 60–100 mm long, green. Flower obliquely erect, 14–16 × 4–5 mm, green; calli black, shiny; column green with a few red spots. Dorsal sepal narrowly spathulate, incurved, 10–11 × 2–2.5 mm; apical club c. 1 mm long. Lateral sepals recurved beneath labellum, 9–10 × 0.8 mm, widely divergent; apical clubs 0.8–1 mm long, yellowish. Petals reflexed against ovary, 7.5–8 × 2–2.5 mm. Labellum obliquely erect, spathulate, 7.5–8 × 4–4.5 mm, apex cut off square. Callus ant-like, narrow, basal cluster prominent, extending to labellum apex. Column 7–8 × 2.5–3 mm.
Locally common; growing in moist, humid areas of open forest and woodland in freely draining, gravelly soil.
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