Japan Flora: Plants nearly glabrous, except the inflorescence; stems 40-80 cm. long; leaves obovate, 8-15 cm. long, 4-9 cm. wide, rather thin, abruptly acuminate, deeply cordate and prominently clasping, short-ciliate while young; inflorescence cymose, at summit of stems and in upper axils, few- to several-flowered, pedunculate; flowers yellow, with purple spots inside, the tepals obliquely spreading, 2-2.5 cm. long, subacute, the outer segments broadly oblanceolate, the inner linear-oblong.  July-Sept. Woods in mountains.

Hokkaido, Honshu, Shi­koku, Kyushu.

var. makinoana (Tatew.) Hiyama. The stems and leaf veins hairy beneath. Oc­curs with the typical phase.