Japan Flora: Deciduous shrub 4-5 m. high; leaves obovate-elliptic or obovate, 3-7 cm. long, 1.5-3.5 cm. wide, subacute, serrulate, loosely pilose to glabrous on upper side, sparsely tufted brown-hairy on the nerve axils beneath, the petioles 5-12 mm. long; racemes 5- to 15-flowered, pendulous, with scatered pale brown crisp hairs, the pedicels 1-2 ent long; calyx-lobes broadly lanceolate, acuminate, about 3 mm. long; corolla campanulate, 8-12 mm. long, pale yellow with dark red striations, the limb shallowly 5-toothed on upper quarter; style included, 5-6 mm. long; capsules elliptic, 5-7 mm. long. June. Mountains; Hokkaido, Honshu (Kinki Distr. and eastw.).
Var. longilobus (Nakai) Makino Leaves elliptic to broadly so; corolla 5-toothed on upper 1/3 to 1/2; styles 4-5 mm. long. Mountains; Kyushu. Var. palibinii (Craib) Bean. Leaves obovate to broadly so or oblong; corolla 5- toothed on upper 1/3; styles 3-4 mm. long; capsules about 4 mm. long. June-July. Mountains; Honshu (n. Kanto and Echigo). Var. sikoldanus Palib. Leaves obovate to broadly so; calyx-lobes narrowly ovate; corolla broadly campanulate, rose-colored, 5-toothed; styles slightly exserted, 4- 5 mm. long. May-June.

Honshu (s. Kinki Distr.), Shikoku.