Japan Flora: Pseudobulbs conical-ovoid, 1-1.5 cm. long; leaves solitary, the petioles 3-7 cm. long, the blades deltoid- to elliptic-ovate, 3.5-7 cm. long, 1.5-3 cm. wide, acuminate, rounded at base, green above, purplish beneath; scapes erect, slender, 20-30 cm. long, with 2 or 3 sheathing scales on lower part; inflorescence loosely 5- to 10-flowered, 4-6 cm. long, the bracts minute; flowers yellowish green; sepals and petals narrowly oblanceolate, about 4 mm. long, obtuse; lip obovate, 3-lobed, about 3 mm. long, the terminal lobe obtuse, entire, the lateral ones minutely toothed; spur slender, about 5 mm. long; capsules fusiform, short- pedicelled, pendulous, about 1 cm. long. May-June. Woods in mountains;

Honshu, Shikoku, Kyushu.