Japan Flora: Nearly glabrous perennial; stems erect, slender, slightly branched, few-leaved, often with upwardly curved white hairs on the nodes; leaves thinly mem­branous, broadly deltoid-ovate, 2-4 cm. long, 15-2.5 cm. wide, subobtusc, shallowly cordate, toothed; spikes 3-6 cm. long, loosely flowered; calyx 2-2.5 mm. long in anthesis, about 5 mm. long in fruit; corolla-tube gently curved upward from the base, 15-16 mm. long, pale purple, the lower lip about twice as long as the upper lip, straight, ascending; nutlets about 0.7 mm. long, densely mammillate，gray-fulvous. July-Aug. Woods in mountains;

Hokkaido, Honshu. Korea, Northeastern China, and e. Siberia.

var. transitra (Makino) Hara. Plant with up­wardly curved white hairs throughout. Hokkaido, Honshu, Shikoku, Kyushu. Korea.