Japan Flora: Prominently white-puberulent perennial herb 50-100 cm. high; stems branched; leaves deltoid-ovate, 3-6 cm. long, 2-3.5 cm. wide, acute, shallowly cordate at base, coarsely toothed or incised, the petioles 1-3 cm. long; spikes of­ten paniculately branched, dense, 2-4 cm. long; calyx 5-7 mm. long, spreading-puberulent, distinctly ribbed, the teeth spine­tipped; corolla pale purple, 8-10 mm. long; nutlets elliptic, 1.5 mm. long, slightly compressed, black-brown, smooth, slighdy inflated on ventral face, the areole transversely broadened, white. July-Aug.

Naturalized in Honshu (Shinano Prov. and northw.). Korea, China, to w. Asia and Europe.