Plants 15-60 cm tall. Rhizome tuberous, ovoid or ellipsoid, 3-5 cm long, 2-3 cm thick, with many-nodes, hollow but with thick wall. Stem straight, fleshy, hollow, pale yellow or nearly white, 3-7 mm in diam., glabrous, with several remote scales; scales membranaceous, ovate to lanceolate, 1-2 cm long, base enclosing peduncle. Raceme 10-20 cm long; bracts ovate-lanceolate, 7-10 mm long, 3-5 mm wide; pedicel and ovary ca. 1 cm long, pedicel slender and pendulous. Flowers numerous, perianth not opening widely, whitish; sepals and petals linear-lanceolate, 8-11 mm long, 1.5-1.8 mm wide, acute or obtuse; lip ovate-triangular when expanded, ca. 1 cm long, 7-8 mm wide, apex acute, base incurved and embracing column, margins minutely erose, disc with 2 longitudinal warty keels, spur short cylindric, 4 mm long, 2 mm across, rounded at tip; column ca. 3 mm long including anther; anther suberect, 2.5 mm long; pollinia 2, ovoid to ellipsoid, ca. 1 mm long, with slender caudicle ca. 1.5 mm long; stigma entire, broad.

NANTOU: Shuili, Su 7159. TAINAN: Paiyuenshan, Su 9017. KAOHSIUNG: Taoyuen, Su s. n. Apr 1973. PINGTUNG: Hengchun, Sasaki s. n. 1932; Sheting, Su 9019.

Widespread from Africa through Asia to Australia and New Caledonia. Taiwan, dry forests at low elevations in the central and southern mountains.