Plants 150–30 tall. Free part of leaf to 80 x 2–4mm. Spike 60–10 long, 6–20-flowered. Ovary shortly stalked. Flowers widely spaced, unscented, 10–12.5 x 7–8mm, greenish-brown to brown with faint striping, labellum greenish or pinkish, callus green or brown. Dorsal sepal 5–6 x 2.5–3mm, decurved. Lateral sepals free or fused at base, 7–8 x 1.2mm, recurved, nearly parallel. Petals 5–6 x 1.2mm, porrect to incurved. Labellum shortly stalked, ovate-lanceolate, 4–5 x 3mm, sharply reflexed near middle, flat or constricted above middle, margins crenulate. Callus narrow, deeply channelled, shiny, extending nearly to labellum apex.