Japan Flora: Glau­cous and glabrous, the stems terete, much-branched, 30-60 cm. long; leaves with slender petioles progressively shorter toward the summit, the blades oblong to ovate, 4-8 cm. long, 2.5-4 cm. wide, obtuse to subacute, acute at base or the upper ones rounded to shallowly cordate at base, coarsely and obtusely serrate, mucronate-tipped, the basal teeth filiform; inflorescence nodding, on a slender peduncle, 1- to 5-flowered, in corymbose racemes, the bracts linear, small; flowers pale yellow, with reddish brown blotches inside, about 2 cm. across, with a gently and downwardly curved spur at base, often cleisto- gamous late in the season.  Wet shaded places in mountains.

Hokkaido, Honshu, Shikoku, Kyushu; rather common. Europe, Siberia, e. Asia, and w. N. America.