Japan Flora: Shrub; branches slender, elongate, arcuate above, slightly angled and short-pubescent while young; leaves linear-lanceo­late, 2-4 cm. long, 3-6 mm. wide, acuminate to acute, acumi­nate at base, with upwardly directed acute teeth, glabrous ex­cept for thin pubescence on midrib while young, the petioles scarcely distinct; inflorescence sessile, 2- to 5-flowered, with few bracts at base; pedicels glabrous, 1-1.5 cm. long; flowers about 8 mm. across, single; calyx glabrous, the teeth erect, deltoid; petals broadly obovate, much longer than the stamens; fruit­ing carpels spreading, glabrous.  Mar.-Apr. A Chinese shrub,

Widely cultivated and extensively naturalized in Hon­shu (Kanto Distr. and westw.), Shikoku, Kyushu.