ニシキギ科ニシキギ属の落葉低木で、学名は Euonymus alatus var. alatus f. striatus。英名はありません。
The "Ko-mayumi" (Euonymus alatus var. alatus f. striatus) belongs to Celastraceae (the Bittersweet family). It is a small deciduous tree that is native to Japan, the Korean Peninsula, northeast China, Sakhalin and Ussuri. This tree grows in hills and dales, and can reach 2-5 m in height. It is a form of the Burningbush, and defined by having no cork wings. The leaves are elliptic and opposite. The inconspicuous pale yellowish-green flowers bloom from May to June. The corolla has a developed flower disk. The leaves turn bright red in fall. The capsules are ripen in fall, splitting open and come out reddish-orange seeds when mature.