Japan Flora: Loosely short-hirsute perennial; stems 4-angled, usu­ally branched, 30-80 cm. long; leaves cauline, ovate, 3-10 cm. long, 2-5 cm. wide, pinnately lobed to cleft, the lobes again incised, abruptly narrowed to a winged petiole; spikes much elongate after anthesis, to 30 cm. long; flowers pale purple, about 4 mm. across, the bracts lanceolate, nearly as long as the calyx; calyx about 2 mm. long; nutlets about 1.5 mm. long, with few longitudinal ribs on back. June-Nov. Weed in waste grounds and along roadsides in lowlands;

Honshu, Shi­koku, Kyushu. A nearly cosmopolitan weed.