Rhizome tuberous, horizontal or rarely erect, cylindrical or conical, 2-9.3 cm long, 0.3-1.5 cm thick, minutely squamate, pilose. Stem 5-50 cm tall, distantly noded and sheathed. Raceme 3-10 cm long, laxly 3-23-flowered; bracts minute, lanceolate. Flowers obovately ellipsoid, dull brownish, ca. 0.5-0.7 mm across; pedicel and ovary 1-1.5 cm long; sepals connate at base, trilobed at apex, 8-11 mm long, glabrous outside, free lobes straight or slightly curved inward, dorsal sepal connate for 3/5 of its length with lateral sepals, nearly round at apex, lateral sepals connate basally for 3/5 of their length, apex sub-rounded; petals attached to sepal tube, ovate, about 3 mm long; lip adnate to column-foot, red or orange red toward apex, unlobed, thin, ovate-triangular, 5-6 mm long, minutely undulate or entire at margins, apex obtuse and somewhat cuspidate, base with long claw, claw bearing 2 ellipsoid calli, disc longitudinally 5-grooved, with a pair of longitudinal lamellae near apex, lamellae lowered and joined together toward apex of lip; column. 5-6 mm long, widest at middle, laterally winged toward apex, wings more or less lunar-shaped; column-foot prominent; anther orbicular, 1 mm across; pollinia, ovoid; stigma near middle of column; rostellum revolute. Capsules obovoid or ellipsoid, 2-2.3 cm long, 0.7-0.8 cm thick, with an elongated pedicel up to 15 cm long.

TAIPEI: South Chiatienshan, Fukuyama 3976. NANTOU: Chitou, Leou 5829, Leou s. n. 16 Jun 1992. CHIAYI: Shihcho, Lin 340; Fungchihu, Leou s. n. 6 Jun 1992. ILAN: Soseikyaku, Hayata s. n. 12 May 1916. HUALIEN: Longchien, Su 9310; 9318.

Japan. Taiwan, forests and bamboo plantations below 1,500 m in the north. and central.