Japan Flora: Shrub with rather slender branches usually pur­plish brown, with rather slender prickles, more or less glau- cescent, the fertile branchlets scarcely elongate, 2- to 4-leaved toward base; leaves ovate to orbicular, 2-5 cm. long, 1.5-4 cm. wide, rounded to acute at apex, rounded to cordate at base, usually shallowly 3-lobed, toothed, distinctly glaucous beneath, the petioles sometimes slightly pubescent on the upper side; flowers 1 (-3) on reddish purple pedicels 1-2.5 cm. long; calyx glabrous, 5-7 mm. long, reddish purple, the segments densely white-tomentose inside; petals white, 10-12 mm. long; fruit enclosed in a persistent calyx, red; stones pitted. Apr，May. Low mountains; Honshu, Shikoku, Kyushu; common. China.

var. subcrataegifolius (Lev. & Van’t.〉Ohwi. Similar to the typical phase but larger, with few slender prickles, the fertile branchlets slightly elon­gate, to 7-15 cm. long; leaves 4-8 cm. long, acuminate, 3- lobed; flowers 1-3; calyx-segments caudately acuminate. Nfay-June. Mountains; Honshu; rather common.