Native to Asia, escaped from cultivation, aggressively growing tree with prolific seed production, can cause damage to sewers and foundations, banned/prohibited in New England.

Native to Europe, commonly planted as an ornamental tree along streets and in parks, escaped into the wild.

Native to Central Europe, spread via timber imports, sap-sucking insect pest, kills fir trees.

Native to Asia, aphid-like insect pest, kills hemlock trees.

Native to Eurasia, frequently along roadsides.

Native to Asia, commonly used as an ornamental tree, escaped into the wild along roadsides and streamsides.

Native to Europe, listed as noxious weed.

Native to South America, listed as noxious aquatic weed.

Native to southeast Asia, grown as an ornamental grass, listed as noxious weed in Texas.

Native to Africa, parasitic chytrid fungus, kills amphibians.

Native to Japan, popular ornamental shrub/hedge, seeds dispersed by birds.

Native to Eastern Asia.