Northern AZ

Siberian Elm (Ulmus pumila) is native to Asia and has become an invasive species in various parts of North America.

Spotted Knapweed (Centaurea stoebe) is native to Eurasia and has become an invasive species in North America.

Yellow Starthistle (Centaurea solstitialis) is native to the Mediterranean region and has become an invasive species in North America.