Japan Flora: Stems 30-60 cm. long, erect, usually loosely puberulent, with few pairs of larger leaves, close together near the top; larger leaves ovate-orbicular to rhombic-elliptic, or broadly elliptic, 10-15 cm. long, 7-13 cm. wide, abruptly acute or shortly acuminate, the petioles 2-5 cm. long; inflores­cence near the top of the stems, rather densely flowered, small, puberulent, the pedicels 1-2 cm. long; corolla-lobes lanceolate, glabrous on both sides, obtuse, about 5 mm. long; corona small, the lobes semirounded; follicles narrowly lanceolate, 5-7 cm. long, 5-6 mm. wide, nearly glabrous, ascending to subercct. May-June. Woods in mountains.

Honshu, Shi­koku.