Terrestrial herb, often with clustered growths. Leaves 4–6, strap-shaped to narrowly elliptic, rounded and minutely emarginate at apex, 8–19 cm long, 2.4–3.6 cm wide, mottled very dark and pale green above, heavily dotted purple below, ciliate on basal margins. Inflorescence 1- or 2- flowered, 6–25 cm long; peduncle up to 20 cm long, purple, shortly but densely white-pubescent; bracts conduplicate, broadly ovate, obtuse, 11–14 mm long, 10–12 mm wide, white to pale green, spotted purple. Flowers white, often highly dotted purple towards base of segments and on front of lip, with a yellow centre to the staminode, 6–8 cm diameter, pubescent on outside and at base of petals within; ovary 4.5 cm long, green flushed with dark purple, densely shortly pubescent. Dorsal sepal very broadly ovate, obtuse to emarginate, 2.7–4.2 cm long, 3–5 cm wide. Synsepal concave, ovate, obtuse, 2–3 cm long, 1.5–3 cm wide. Petals elliptic, rounded, 3.3–4.3 cm long, 2.2–3.9 cm wide, shortly ciliate on margins. Lip rather small, ovoid to ellipsoidal, with incurved margins, 2.2–3.6 cm long, 1.5–1.8 cm wide. Staminode broader than long, transversely subelliptic, one- to three-toothed at apex, 6–9 mm long, 10–12 mm wide. 2n = 26.