Flowering plant 22–45 cm tall, stout. Leaf linear-lanceolate, 15–40 cm long, usually shorter than raceme, keeled, somewhat fleshy. Stem bracts 1–3. Flowers green and purple, 1–4; subtending bract oblong-lanceolate to ovate-lanceolate, tapering to fine point, shorter or longer than flower; pedicel (excluding ovary) 1–2 cm long; dorsal sepal erect, broadly ovate, c. 15 mm long, slightly hooded, acute; lateral sepals ovate, as long as dorsal sepal but narrower, divergent, spreading below or at side of labellum; petals spreading, ovate, slightly asymmetric, about half as long as sepals, yellowish with dark markings. Labellum ovate, 11–15 mm long, resembling-sepals, margins entire, concave and incurved, with conspicuous purplish nerves; glands, papillae and hairs absent. Column short, widely winged, with a purple gland at the base of each wing, the glands connected by a ridge.
GipP, OtP, Gold, CVU, NIS, EGL, HSF, OtR, VAlp. Also SA, NSW, Tas. Flowers Oct.-Dec.
