Leaf cordate to round, 5–30 × 10–20 mm, light green to greyish green above, reddish to purple beneath. Flower strongly nodding, 12–15 mm long, dark reddish purple to purplish black, shiny, on stalk c. 10 mm long. Dorsal sepal 13–16 × 10–12 mm, strongly bulbous, shorter than labellum, with basal claw 3–4 mm long. Lateral sepals c. 10 mm long, white. Petals c. 5 mm long, white. Labellum 12–15 mm long, tubular with a projecting lower beak, bristles sparse or absent around orifice. Calli white to red, clustered in single row along mid-line.