Plant 50–120 mm tall. Leaf 50–100 mm long; free part 10–15 mm long, often close to lowest flower. Spike 5–20 mm long, 2–10-flowered. Flowers usually crowded, porrect, 6–7 × 5 mm, yellowish green with red stripes and reddish labellum. Dorsal sepal 3–4 × 2 mm; with red bands, margins glabrous; apex sharply pointed. Lateral sepals divergent, 4–6 × 1.5 mm; base not humped. Petals 3 × 1 mm, widely spreading; margins glabrous; apex extended into long recurved point. Labellum tremulous, elliptical, 3 × 1 mm, fleshy; margins with numerous hairs to 1 mm long; apex recurved, sharply pointed. Callus broad at base then tapered, dark red, extending nearly to labellum apex.