Terrestrial herbs. Rhizome nearly erect, leafy upward, to 15 cm tall. Leaves sessile, linear or linear-lanceolate, 5-7 cm long, 0.5 cm wide, green or brown. Spike terminal or on basal lateral branches, densely flowered; peduncle bearing several sheaths below; bracts ovate-lanceolate, apex acuminate, to 1.5 cm long, brown. Flowers white with yellow lip; ovary glabrous, 5-7 mm long; sepals glabrous, 5-7 mm long, dorsal one rhombic-ovate to elliptic, concave, constricted or saccate at base, lateral ones oblong-lanceolate, spreading; petals falcate, acuminate at apex; lip tripartite, rarely undivided, yellow, 5-6 mm long, with green veins, hypochile saccate, bearing 2 lamellate papillae within, mesochile fleshy, hairy, epichile of various shapes, often transversely semiorbicular or rectangular; column curved downward, without ventral appendages; anther broadly ovate, 1.3 mm long; pollinia clavate, 0.8 mm long; stigma 2, on lateral sides of column; rostellum of varied form, deeply cleft, recurved; tegula oblong, slightly constricted at middle, 1.3 mm long; viscidium round.

TAIPEI: National Taiwan University, Segawa, s. n. Feb 1934; Su 9441. ILAN: Taton, Leou 3769; Su 8965. TAINAN: Hsinhua, Su 9439. PINGTUNG: Fungkong, Segawa, s. n. Feb 1933. HUALIEN: Fonglin, Segawa, s. n. May 1937.

Tropical and subtropical Asia and America. Taiwan, sunny grasslands at low elevations.