Japan Flora: Small, creeping, sparsely branched, glabrous shrub, the branches elongate，green, terete, obscurely 4-striate; leaves rather thick, broadly oblanceolate to broadly lanceolate, rarely nearly oblong, 7-12 cm. long, l-3(-5) cm. wide, long-acumi­nate, acute to obtuse at base, obsoletely serrulate, deep green on upper side，the nerves not prominent, the petioles 4-7 mm. long; inflorescence 3 or 4 cm. long, loosely few-flowered on slender peduncles; flowers 5-merous, purplish, about 8 mm. across; calyx-teeth semirounded, minutely toothed on margin; petals orbicular; fruit globose, about 8 mm. across, smooth. July. Woods in mountains.

Honshu