Japan Flora: Perennial, sometimes with thickened narrowly fusiform roots; stems 20-40 cm. long, usually soft-pubescent, decumbent or ascend­ing at base, becoming erect; leaves hastate, 5-10 cm. long, 4-7 cm. wide, abruptly acuminate, cordate at base, pilose, the long petioles pilose; spikes 10-20 cm. long, spreading-pilose, the bracts ovate, longer than the pedicels; calyx with scattered long-spreading hairs; corolla pale yellow, 2.5-3.5 cm. long, bilabiate and bifid almost to the middle; nutlets obovate- orbicular, obtusely 3-angled, slightly flattened, smooth, about 2 mm. long. Aug.-Oct Woods and thickets in mountains.

Honshu, Shikoku, Kyushu; rather common.

var. trisecta (Matsum.) Honda. Leaves 3-parted. Shikoku and Kyu­shu.