Japan Flora: Roots horizontal, slighdy thickened; stems 40-60 cm. long, stout, 5- to 8-leaved; lower 3-5 leaves narrowly oblong, 12-20 cm. long, 4-7 cm. wide, acute to obtuse or acuminate, short- sheathed at base, the upper leaves 2-4, becoming bractlike，broadly linear, racemes 10-20 cm. long, densely many-flowered; bracts usually slightly longer than the flowers, acuminate; flowers white; dorsal sepal elliptic, 7-8 mm. long, rather obtuse, navicular, keeled, the lateral sepals obliquely ovate, obtuse, about 8 mm. long; petals subdeltoid, obtuse, erect, somewhat thickened, slightly shorter than the sepals; lip broadly linear, 13-15 mm. long; spur pendulous, linear, 3-4 cm. long. May-June.

Hokkaido, Honshu, Shikoku, Kyushu; rather rare. China.