Terrestrial herbs, often hygrophilous. Rhizome often erect, tufted, densely noded and bearing many roots at each node, produced into erect stem 20-30 cm long, leafy upward. Leaves ovate-lanceolate, elliptic or rhombic, 10-15 cm long, 3-5 cm wide, acuminate at apex, cuneate at base; petioles 3-6 cm long, with many subparallel lateral veins. Peduncle up to 30 cm long, glabrous at base, sparsely hairy toward apex, with 3-5 sheaths below; rachis ca. 15-20 cm long, with up to hundred flowers; floral bracts glabrous or hairy outside, irregularly denticulate at margins. Flowers spicate; ovary glabrous; sepals green, glabrous, 3-3.5 mm long, dorsal one elliptic, lateral ones ovate, spreading horizontally; petals obliquely spatulate, white; lip nearly orbicular, 2.5-3 mm long, base slightly saccate, hairy inside, apex recurved, disc with 2 rounded callose protuberances; column 1.5-2 mm long; anther more or less incumbent; pollinia clavate; stigma rounded; rostellum, bifid at apex; viscidium ovate.

TAIPEI: Pinlin, Leou 3678; Wulai, Leou 3779. TAOYUEN: Shimen, Leou 3695. ILAN: Tungao, Su 7851. NANTOU: Hsinyi, Leou 3751; Chitou, Leou 3317. KAOHSIUNG: Duona, Leou 3764. TAITUNG: Lanyu Is., Leou 3454.

Widely distributed in subtropical Himalaya, India, Indochina, Malaya, southwestern China, Japan and the Ryukyus. Taiwan, in moist places throughout the island.