Japan Flora: Shrub with slender, slightly flattened, acuminate prickles, and with scattered yellowish sessile discoid glands on young branches, underside of leaves, leaf-axis, and calyx, the branches slightly prickly, short-pubes­cent while young, the flowering canes slightly elongate, spar­ingly prickly; leaflets 5-7, membranous, broadly lanceolate to narrowly ovate, 1-3 cm. long, acute to acuminate, short- pubescent on both sides especially on nerves beneath, doubly toothed, the petioles short-pubescent and with few prickles, the stipules lanceolate; flowers solitary, the pedicels 2-3 cm. long, short-pubescent; calyx 10-16 mm. long, short-pubescent, the tube nearly flat, the lobes narrowly ovate, caudately acuminate, short-puberulent inside; petals white, 12-15 mm. long, broadly obovate-orbicular; fruit globose, the receptacle pilose, the fruitlets glabrous; stones small, about 1.5 mm. long, pitted. Apr.-May.

Honshu (centr. distr. and westw.), Shikoku, Kyushu.