Plants 20-40 cm tall. Tuberoids fusiform, 2-5 cm long, 3-5 mm thick, with new shoot arising at base. Stem ridged, with one or two unequal large leaves near ground and several smaller leaves in upper part. Large leaves elliptic- oblanceolate, 10-15 cm long, 3-5 cm wide, apex acute, narrowed into sheath at base. Inflorescence remotely several-flowered; bracts lanceolate, 8-30 mm long, acute or acuminate, lower ones larger; pedicel and ovary 12-15 mm long. Flowers light yellow or light green; dorsal sepal concave, nearly orbicular, 4.5 mm long, 3.5 mm wide, obtuse or rounded at apex, 3-nerved; lateral sepals strongly reflexed, linear-falcate, 6.5 mm long, 1.8 mm wide, apex acute, 3-nerved; petals closely connivent with dorsal sepal forming hood, obliquely deltoid, 5.5 mm long, 1.8-2 mm wide, apex acuminate, contracted at base; lip descending, broadly linear, 7 mm long, 1.6 mm wide, apex obtuse, spur slender cylindrical, arcuate, usually parallel to ovary, 17-23 mm long; column 3 mm tall; anther cells clavate, widely separated and parallel, staminodes ellipsoid; pollinia ovoid, 1 mm long, caudicle ca. 2 mm long, viscidium orbicular discoid; stigmatic surfaces flat, concave cavity under rostellum; rostellum narrow tape-like, slightly curved into an arch.

TAIPEI: Peichiatien, Su 8079; Chulu, Lin 375. TAOYUEN: Lalashan, Lin 287; Ying s. n. Jul 1988. Nanchiatien, Lin 449. MIAOLI: Yangmei, Lin 280. PINGTUNG: Tahan, Yang 22690.

Endemic, usually in moist forests in northern mountainous regions, 1,000-1,700 m.