Leaf about half developed at flowering; at maturity 350–580 × 15–22 mm, bright green, shiny, back sharply keeled, front nearly flat. Flower stem 400–700 mm tall, stout, dark green, glossy, 5–15-flowered. Sterile bracts sharply keeled, apex acuminate. Flowers lasting 2–4 days, 25–28 × 15–18 mm, dull green with red or purple markings, labellum base dark purple, papillae pinkish red. Dorsal sepal obliquely erect, broadly ovate, 10–12 × 8–8.5 mm, concave. Lateral sepals ovate-lanceolate, 10–12 × 5–5.5 mm, divergent, apex blunt, mucronate. Petals oblong-lanceolate, 9–10 × 4 mm, widely spreading, blunt. Labellum curved in profile, obovate in outline, 20–22 × 8.5–9.5 mm; basal quarter with glossy, appressed, dark purple papillae flanked by two wall-like purple ridges; main area covered with pinkish red glandular papillae to 5 mm long; apical 2.5 mm densely glandular, but no papillae, blunt; central margins with numerous spreading, minutely glandular lobes to 5 mm long. Column 6–7 × 4 mm, pale green with purple spots, no sham eyes or connecting ridge.
Disjunct and localised; usually growing at low altitudes on moist, grassy flats and grassy woodland in loamy soil, but also occasionally found at moderate altitudes among tussocks on relatively dry slopes and ridges in open forest in gravelly soil.
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