Japan Flora: Stems much-branched, 40-80 cm. long, usually reddish; leaf-blades rhombic-ovate to narrowly rhomboidal, 6-15 cm. long, 3-7 cm. wide, acuminate, cuneate at base, vivid green, short awn-toothed, the upper leaves smaller, nearly sessile and rarely obtuse at base; peduncles ascending, elongate, straight, with fleshy spreading reddish hairs, the bracts lanceolate to deltoid-ovate, spreading, small, the pedicels 2 cm. long; flowers purplish red, with purple spots, about 3 cm. across, the spur prominently circinnate; fruit oblanceolate, 1-2 cm. long. July-Sept. Wet shaded places on low mountains.
Hokkaido, Honshu, Shikoku, Kyushu; rather common. Korea.