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 Bluestem is considered a problem due to its aggressive growth, rapid spread, and the ability to form dense stands, displacing native vegetation and impacting ecosystems.

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