Japan Flora: Small tree glabrous except for the bud-scales, nodes of leaf-rachises and top of the ovary; leaflets 9-13, thickly membranous, oblong to narrowly so, 3.7-7 cm. long, 1-2 cm. wide, obtuse to abruptly acuminate with a mucro at apex, vivid green and slightly glaucescent, whitish beneath, with ascending to incurved acuminate teeth on upper half, the lateral nerves not raised; inflorescence erect, large, many-flowered, 5-8 cm. across; flowers white, about 1 cm. across; calyx-teeth incurved in fruit, brown-ciliate; petals spreading, ovate-orbicular, short-clawed; fruit ellipsoidal to globose, red. June-Aug. Mountains to alpine zone. 

Hokkaido, Honshu (centr. and n. distr.).

f. pseudo­gracilis (Koidz.) Ohwi. With a large toothed stipule subtending the inflorescence.