Euonymus. "Euonymus alatus was introduced into the USA from northeastern
Asia around 1860 for use as an ornamental shrub. The bright red fall foliage
of E. alatus makes this shrub a popular ornamental planting, and it is
commonly planted along interstate highways, as hedges, and in foundation
plantings. While it behaves well in urban areas, E. alatus planted near
woodlands, mature second-growth forests, and pastures can be problematic.
It has been observed escaping from cultivation in the northeast and midwest.
E. alatus is a threat to woodland areas, fields, and coastal scrubland
because it outcompetes native species" (Tunyalee Martin/Wildland
Invasive Species Team).