Euonymus macropterus is a species of flowering plant in the family Celastraceae, which is commonly known as the big winged spindle tree. It is native to East Asia, including China, Japan, and Korea. The plant is a deciduous shrub or small tree that can grow up to 10 meters tall.
The leaves of Euonymus macropterus are opposite, elliptical, and measure about 7-15 cm in length. They are glossy and dark green on the upper surface and lighter green on the lower surface. In the autumn, the leaves turn to shades of yellow, orange, and red before falling.
The flowers of Euonymus macropterus are small, greenish-yellow, and inconspicuous. They appear in clusters in the leaf axils in late spring to early summer. The fruits are green, four-lobed capsules that are about 2-3 cm in diameter. As they mature, they turn pinkish-red, and then split open to reveal orange seeds that are surrounded by a fleshy aril.
Euonymus macropterus is often cultivated as an ornamental plant in gardens and parks due to its attractive foliage and fruit. The plant prefers well-drained soil and full to partial sunlight. It is relatively easy to grow and can tolerate a wide range of soil conditions. It can be propagated by seed or by softwood cuttings taken in early summer.