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Euonymus is a genus of roughly 130-140 deciduous and evergreen shrubs, small trees, and vines in the bittersweet family (Celastraceae), native to Asia, Europe, North America, and parts of North Africa and Australia. Forms range from upright multi-stemmed shrubs to low, rooting groundcovers and vigorous climbing vines, with small, inconspicuous four-petaled flowers in late spring or summer followed by colorful seed capsules that split open to reveal orange-red seeds birds love to spread. Two species make up almost everything sold under this name in the Chicago area: the deciduous Burning Bush (Euonymus alatus), prized for brilliant red fall foliage, and the evergreen Wintercreeper (Euonymus fortunei), grown as a groundcover, climbing vine, or small shrub for its variegated foliage. Both are fast, tough, adaptable plants -- and both have a well-documented invasive streak in parts of the eastern and midwestern U.S., so newer seedless or restrained cultivars are generally a better choice than unimproved, heavy-seeding forms.
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