(Wisteria spp.)
Chinese wisteria (Wisteria sinensis) and Japanese wisteria (W. floribunda) are both considered invasive in the US. These species are difficult to differentiate and often hybridize (W. x formosa). The vines are native to Asia and were introduced to the US as ornamentals in the 1800s. They have spread throughout the southern and mid-Atlantic US. Vines invade forest edges, disturbed areas, riparian zones, and rights-of-way.