Japan Flora: Shrub, the branches with few rather slender short prickles flattened below, elongate and branching, the flowering branchlets elongate, pubescent, thinly prickly; leaflets 3, appressed-pubescent and often glabrate above, usually pubescent on nerves, with short white tomentum beneath, coarsely double-toothed, the lateral leaflets smaller, broadly obovate to cnneate-orbicular, acute to rounded, the terminal rhombic-orbicular to broadly obovate, 3-5 cm. long and as wide; inflorescence several-flowered, densely pubescent; calyx 5-8 mm. long, usually prickly, the lobes narrowly ovate, acuminate, with short white tomentum especially prominent on the inner side; petals pale pink, erect and connivent above, broadly obovate, 5-7 mm. long; fruit red, globose, the fruitlets puberulent. May-July. Waste places and roadsides in lowlands and low mountains.
Hokkaido, Honshu, Shikoku, Kyushu; very common.
var. concolor (Koidz.) Makino & Nemoto. Leaves green, not tomentose. Rare. Occurs with the typical phase.