Japan Flora: Peren­nial creeping herb; stems tufted, erect, 5-20 cm. long; creeping stems 50 cm. or more long, with spreading hairs; leaves reni- form to cordate, 1.5-2.5 cm. long, 2-3 cm. wide, coarsely ob­tuse-toothed, slightly pubescent on both sides, long-petiolate; flowers 1-3 in leaf-axils, the pedicels short, puberulent; calyx 7-9 mm. long, spreading-pilose, the Ueth short spine-tipped; corolla rose-purple, 15-25 mm. long, the upper lip retuse, the lower lip obliquely spreading, dark-spotted, twice as long as the upper; nutlets ellipsoidal, 1.8 mm. long, rounded, slightly compressed, keeled on the ventral face, obscurely glandular- dotted, nearly smooth. Apr.-May. Hedges and thickets in lowlands and low mountains;

Hokkaido, Honshu, Shikoku, Kyushu; common. Temperate regions of e. Asia, Formosa, and Korea.