Japan Flora: Mostly deciduous shrubs about 1 m. high; vernal leaves narrowly oblong to elliptic or ovate, 4-7 cm. long, 1-3 cm. wide, dull, acute at both ends, with spreading glandless and glandular hairs especially on under side and on the petioles, the petioles 3-7 mm. long; summer leaves sometimes persistent over winter, smaller and oblanceolate, obtuse, the petioles 3-7 mm. long; flowers 1-5, pale rose-purple, terminal, the pedicels 1,5-3 cm. long, glandular-hairy; calyx-lobes green, linear lanceolate, acute, 2-3 cm. long, viscid; corolla about 5 cm. across, infundibuliform; stamens 5, the filaments granular- pilose; styles glabrous; capsules ovoid, 1-1.2 cm. in diameter, long glandular-pilose. May. Sunny hillsides;

Honshu (Izu, Kai, and westw. to e. Chugoku Distr.), Shikoku; common and with numerous cultivars grown in gardens.