Japan Flora: Plant 15-30 cm. high; pseudobulbs ovoid-globose, 8-12 mm. long; leaves 2, elliptic to oblong, 5-10 cm. long, 2.5-3.5 cm. wide, obtuse at tip, abruptly narrowed at base to the short-sheathing petiole; peduncles 15-30 cm. long; racemes 10-20 cm. long, rather loosely many-flowered; bracts spreading, deltoid-ovate, acute, 1-1.5 mm. long; flowers pale green or purplish; sepals linear- lanceolate, 8-9 mm. long, subobtuse; petals as long as the sepals, filiform; lip obovate, flat, erect, 12-18 mm. long, 10-15 mm. wide, rounded, with a slightly recurved mucronate tip; column about 2.5 mm. long, narrowly winged at tip. May-July. Woods;

Hokkaido, Honshu, Shikoku, Kyushu. Korea.