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Plants with subterranean, moniliformous rhizomes; leaves somewhat thick-tissued, partly developed at anthesis, reaching 350 mm long; flowering stem up to 0.8 m tall. Inflorescences lax and elongate, c. 10-20-flowered. Flowers: sepals dull brown, paler to greenish yellow on the inner surface, petals yellow, veins marked with reddish brown inside, lip bright yellow, side lobes with reddish brown markings. Median sepal 7-9 mm long, narrowly obovate, mucronate; lateral sepals similar. Petals spreading, nearly 2x as long as the reflexed sepals, 12-14 mm long, broadly ovate, obtuse to retuse. Lip 3-lobed, crests consisting of verrucose ridges, produced chiefly on the convex portion of the midlobe; midlobe abruptly incurved so that its central concavity lies close to the gynostemium apex; side lobes erect and adnate to the mentum with their longest axis parallel to it; mentum 5-6 mm long; spur nearly cylindrical, c. 3 mm long. Gynostemium c. 5 mm long.
A herb or orchid. It grows in the soil. It forms tubers under the ground. They are 4-5 cm across and 2-3 cm wide. They form a chain. The roots are fleshy and white. There are 4-7 leaves. They form a fan. They are 17-38 cm long by 3-18 mm wide. The flowering stalk is 1 m tall. There are up to 16 flowers. The sepals are purple-red and the petals are yellow with red veins inside.
Terrestrial herb, up to 0.8 m high. Subcylindrical part of spur shorter than 1 mm. Midlobe of lip incurved so that central convexity lies close to column. Flowers with petals and lip yellow with reddish brown markings on inner surfaces.
Lip 12–14 mm long, 3-lobed; side lobes erect, rounded; mid-lobe very convex, 7–9 mm long with a callus of 3–5 verrucose ridges reaching the apex; spur 5.5–8 mm long (8–9 mm long to apex of ovary), conical, upcurved.
Flowers rather fleshy, sepals purple-red, petals yellow, heavily veined with red inside, lip yellow, the side lobes purplish, the mid-lobe edged with purple.
Leaves 4–7, forming a fan, 17–38 cm × 2.5–18 mm, linear, acuminate, conduplicate when young, succulent, absent or not fully developed at flowering time.
Perennating organs subterranean, tuberous, asymmetrical, 3.5–5 × 1.3–3 cm, forming a chain; roots 1.5–3 mm in diameter, fleshy, white.
Inflorescence up to 1 m tall, up to c. 16-flowered; scape with 5–6 papery sheaths along its length.
Petals 8.5–13 × 9–13 mm, suborbicular or broadly ovate, acute or obtuse.
Bracts 4–15 mm long, linear-lanceolate, acuminate.
Sepals 6.7–10.6 × 3.5–4 mm, oblong, apiculate.
Pedicel and ovary 10–20 mm long.
Column 3–5 mm long.
Terrestrial herb.
