A terrestrial herb 60–100 cm. tall. Perennating organs underground, tuberous, irregularly ovoid-fusiform, flattened dorso-ventrally, 3.5–6 cm. long, 2–5 cm. diameter, up to 1 cm. apart on short rhizome; roots 3 mm. diameter, white. Leaves 2–4, fleshy, linear, acute, 18–50 cm. long, 0.7–2 cm. wide. Inflorescence laxly 6–20-flowered, produced before leaves; peduncle with 4–6 sheaths, 2–3 basal ones sheathing, upper lanceolate, spreading; rhachis 9–20 cm. long; bracts linear-lanceolate, acuminate, 8–12 cm. long. Flowers with red-brown sepals; petals yellow, red-brown within and red-veined; lip yellow with red-veined side lobes and a brown spur; pedicel and ovary 10–13 mm. long. Dorsal sepal reflexed, oblanceolate, apiculate, 8.5–12.5 mm. long, 3.8–6.3 mm. wide; lateral sepals similar. Petals elliptic-subcircular or elliptic-ovate, apiculate, 12–17.5 mm. long, 13–19 mm. wide. Lip 3-lobed, difficult to flatten, 11–15 mm. long; side lobes erect, rounded; mid-lobe convex, elliptic-obovate, obtuse or apiculate; callus of 5 fleshy rugulose ridges; spur deflexed or straight, conical-cylindrical with a broad mouth, 13–16 mm. long. Column 7–8 mm. long. Fruit pendent Fig. 108/13–22.
Terrestrial herb 26–100 cm high, flowering when leafless.Perennating organs subterranean, tuberous, asymmetrical, 3–6 × 2–5 cm, forming a chain.Leaves 2–4, 18–50 × 0.7–2 cm, linear, fleshy.Inflorescence laxly 6- to c. 20-flowered; scape purplish, with several sheaths.Pedicel and ovary 10–20 mm long, purple, arched; bracts 8–13 mm long, linear, acuminate, purple.Sepals purple-brown; petals yellow, the inside flushed with red-brown and heavily veined with red; lip yellow, the side lobes veined with red; spur red-brown.Sepals 8–13.5 × 4–6 mm, oblanceolate, apiculate.Petals 13–19 × 12–19 mm, suborbicular to elliptic-ovate, apiculate, held horizontally.Lip 16–26 mm long, hard to flatten, 3-lobed, side lobes erect, joined to base of column; mid-lobe 8.5–12.5 × 7–9 mm, with a callus of 5 fleshy ridges, convex, elliptic-obovate, obtuse or apiculate.Spur 6–9 mm long, (13–16 mm long to apex of ovary), conical-cylindrical from a wide mouth, horizontal or somewhat deflexed.Column 7–8 mm long.