Purple Starthistle, Centaurea calcitrapa

Impacts:

• Crowds out native species
• Grows and spreads aggressively
• Unpalatable to wildlife and livestock
• Threatens grazing capacity of rangeland

Other problematic invasive weeds:

Giant Reed (Arundo donax)

Salt Cedar (Tamarisk ramosissima)

Perennial Pepperweed (Lepidium latifolium)

Yellow Starthistle (Centaurea solstitialis)

Barbed Goat Grass (Aegilops triuncialis)

Tree of Heaven (Ailanthus altissima)