Native to eastern Asia and introduced to US as a biological control of aphids and scale insects. Its range in the United States has become widespread and some reports of sightings in western US. In recent years it has become a pest in some areas due to its desire to find shelter indoors in winter months. It has also become a pest to grapes crops. When disturbed it releases a yellowish fluid to ward off attacks.

Native to Europe, Baltic States, and southwestern Asia. Considered a groundcover as it spreads along ground and rarely climbs. Glossy leaves, evergreen, and leathery texture. Flowers vary in color from white to purple and bloom from spring to summer. Prefers partial sun to full shade. Soil requirements vary depending on how established it is (rich soil for new growth whereas adaptable when fully established).

Catbrier or Common Greenbrier native to Eastern United States. Glossy leaves usually heart shaped. Woody stems with sharp thorns or spines. Found in clearings, woods, or roadsides and once established can become dense. Bears clusters of dark berries maturing in late summer.