Rhizomes terete, stiff, ca. 1.5 mm in diam. Pseudobulbs 1-3 cm apart, ovoid, 1-2 cm long, 6-10 mm wide, greenish yellow, obscurely rugose. Leaves sessile, linear-oblong, 3-7 cm long, ca. 1-1.8 cm wide, apex obtuse or slightly retuse, base cuneate. Scapes ca. 4-7 cm long, yellowish green, with minute scales below; bracts ca. 2-3 mm long; pedicel and ovary 8-10 mm long. Flowers 5-8, in an umbel, ca. 1.5 cm long; dorsal sepal reddish, ovate, 3-4 mm long, 1.5-2 mm wide, upper part thinner, with 3 dark veins, rounded to obtuse at apex, lower part thickened and concave, with many small processes outside; lateral sepals orange to yellow, often connate along upper edge, linear-oblong, 1-1.5 cm long, 2-3.5 mm wide, base oblique, with purplish veins; petals reddish, obovate to elliptic, 3 mm long, 1.5 mm wide, 3-nerved, slightly oblique; lip yellowish brown above, reddish below, horn-like, ca. 3 mm long, recurved at apex; column purple, 1.5 mm long, with 2 short stylids at top, foot 2 mm long, curved upward; anther operculate, reddish, ca. 0.5 mm long; pollinia 2 or 4 in coherent pairs. Capsules ellipsoid, ca. 1.5 mm long. Seeds fusiform, 0.4 mm long, tips shortly caudate.

TAIPEI: Wulai, Su 400; Tapaokeshan, Su 7419. ILAN: Nanao, Su 8062; Su et al. 7990. TAOYUEN: Najyeshan, Su & Chen 8539; Lalashan, Su 1335. HSINCHU: Chutung, Segawa s. n. Jan 1936; Litung, Su & Chen 8288. NANTOU: Ruantashan, Segawa s. n. Oct 1938; Chitou to Alishan, Su & Chen 7870. CHIAYI: Alishan, Sasaki s. n. Jan 1910. KAOHSIUNG: Dona, Su et al. 7529, 7544. PINGTUNG: Chiaochow, Segawa s .n. Oct 1934. HUALIEN: Lakulakuchi, Su & Hsu 8185.

Widely distributed in southern China, the Himalaya, India, Myanmar, Thailand, and Indochina. Taiwan, very common in forests at 500-1,500 m throughout the island.