Saprophytes. Tubers white, subterranean, horizontal, ellipsoid or elongate irregularly shaped, 7-16 cm long, 2-5 cm in diam., with 5-10 nodes, producing many thick fleshy roots. Green leaves absent. Scapes purplish brown, 40-60 cm tall, 5-10 mm thick, with 2 tubular sheaths below ca. 4-6 cm long, peduncle remotely scaled, scales linear-lanceolate, 2-3 cm long; rachis 10-30 cm long, laxly with more than 10 flowers; floral bracts lanceolate, 12-20 mm long, 3 mm wide; pedicel and ovary 15-22 mm long, greenish brown. Flowers dull reddish brown, perianth spreading, 3-4 cm across; dorsal sepal elliptic, 15-20 mm long, 5-7 mm wide, acute to acuminate; lateral sepals ascending, oblong, 18-23 mm long, 68 mm wide, apex acute, base oblique; petals obovate, 12-15 mm long, 5-9 mm wide, acute; lip erect at apex of column foot, cuneate-triangular in outline, 16-18 mm long, 11-14 mm wide when expanded, shortly saccate at base, 3-lobed near middle, lateral lobes erect and embracing column, ovate-triangular to semiorbicular, obtuse, midlobe pale yellow, recurved, ovate-triangular or ovate-orbicular, 6-7 mm long, disc papillose, with 2 low reddish keels near base; column stout, 5-7 mm tall, 4 mm wide, foot 6-7 mm long, 4 mm wide, thinner toward apex; anther yellowish, conic-semispherical, 2.2 mm long; pollinia ellipsoid, 1 mm long. Capsules ellipsoid-fusiform, 3-4 cm long.

PINGTUNG: Shetin, Su 9008; Hengchun, Sasaki s. n. May 1932. TAITUNG: Chingshuiying, Su s. n. * May 1969.

Widely distributed from the Ryukyus, southern China, India, southward to Malaysia, Indonesia, northern Australia and Papua New Guinea. Taiwan, lowland sparse forests or grasslands of eastern and southern parts.