Autumn Olive – Elaeagnus umbellata – non-native
This shrub is native to East Asia, was brought to the United States in 1830 and was planted in part as a restoration method for deforested lands. It spread across the Midwest and Mid-Atlantic regions of the country with the aid of birds and other wildlife who consume its fruit. Because its seeds are produced at a high rate, it is able to rapidly spread across the habitats it invades, leaving nitrogen-saturated soil in its wake.
Sources: Woody Invasives of the Great Lakes Collaborative
National Parks Service U.S. Fish and Wildlife Services