Round leaf bittersweet is an invasive woody vine, native to China, Korea, and Japan, that was introduced to North America in the mid-1860s as an ornamental shrub. The vines girdle and smother trees and out-compete our indigenous American bittersweet, making it a formidable foe in our Minnesota woodlands. In an attempt to eradicate bittersweet from their soon-to-be prairie, Wendy and Mark tried killing it off with a low-heat fire, digging up the roots, and smothering it with a large blue tarp. All efforts proved unsuccessful until now.