Japan Flora: Perennial herb; stems erect, 40-100 cm. long, 4-angled, branched in upper part, white-puberulent; leaves thinly membranous, ovate-cordate or ovate, 5-10 cm. long, 3-7 cm. wide, acuminate, cordate to rounded at base, toothed, nearly glabrous above, often whitish beneath, the petioles cm. long; spikes 5-15 cm. long, about 2 cm. across, densely many-flowered, often interrupted below, bracteate; calyx 5-6 mm. long, the teeth narrowly deltoid, acute about 1/3 as long as tlie calyx; corolla purple, 8-10 mm. long, the limb short; stamens long-exserted; nutlets obovate- elliptic, compr«sed-trigonous，1.8 mm. long, rounded and without a ridge at apex, puberulent above. Aug.-Oct.  Grassy places in mountains especially along streams and val­leys;

Hokkaido, Honshu, Shikoku, Kyushu. Korea, Northeastern China, e. Siberia, China, and Formosa.