Japan Flora: Ill-scented thinly-pubescent perennial herb, 40-100 cm. high; stems 4- angled, green, branched; leaves membranous, ovate to broadly so, 8-15 cm. long, 4-8 cm. wide, green, obtusely toothed, short- acuminate, shallowly cordate to rounded at base, long-petio- late; panicles long-pedunculate, loosely few-flowered, the pe­duncles and pedicels often scattered glandular-pilose; calyx obconical, 2-3 mm. long in anthesis, 5-6 mm. long in fruit, the teeth deltoid; corolla blue-purple, the tube 8-10 mm. long, the limb oblique, the largest lobe reflexed, slightly longer than the tube; stamens 3-3.5 cm, long; style 3-3.5 cm. long; nutlets obovoid, 4-4.5 mm. long, net-veined, glandular-dotted. Aug.-Sept. Woods in mountains.

Hokkaido, Honshu, Shi­koku, Kyushu. Korea and China.