Japan Flora: Suffruticose or a small shrub with few slender prickles and dense spreading pubescence, often with short glandular hairs, the flowering branchlets rather short; leaflets membranous, 3 (sometimes 5 on vigorous shoots), ovate, 25-7 cm. long, 2-4 cm. wide, acute, rounded at base, doubly toothed, prominently hairy on both sides, the petioles soft-pubescent, sometimes with glandular hairs, the stipules lanceolate; flowers 1 or 2, white, erect, about 3 cm. across, the pedicels 3-6 cm. long, densely glandular-hairy; calyx-lobes lanceolate-deltoid, densely puberulent on both sides, glandular- pilose outside, caudately elongate above; petals obovate to ovate-orbicular, 15-20 mm. long; fruit red, globose, the fruit- lets many.  Apr.-May. Thickets and waste grounds in lowlands and low mountains; Honshu, Shikoku, Kyushu; rather common.  Korea and China.

cv. Harae. A double-flowered

f. simplicifolius (Makino) Ohwi. Leaves simple, 3-cleft; gradually grading into the typical phase 

f. ohmatiensis. With simple and pinnately ternate leaves on the same plant.