Japan Flora: Annual; stems erect, branched, 50-100 cm. long, the branches glabrous, elongate, ascending; leaves thin, hastate- ovate to deltoid or ovate, 3-5 cm. long, 2.5-45 cm. wide, obtuse or acute, with a large tooth on each side or 3-lobed, with spreading acute to obtuse lateral teeth, broadly cuneate to subtruncate at base, slightly glaucous, mealy beneath while young, the petioles 1-4 cm. long; inflorescence loosely flowered; sepals 5, elliptic or broadly obovate, obtuse, greenish on back, 1-1.3 mm. long; utricles orbicular, flat, smooth, the seeds black, about 1.3 mm. across, discoid, lustrous, indistinctly striolate, keeled on margin. Aug. Mountains;

Honshu (Kanto Distr.); rare. e.Siberia and Manchuria.