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What is an Invasive Weed?
Where do they thrive?
Why should I care?
What can I do?
Dirty dozen invaders of the Southwest
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Dirty Dozen Invaders of the Southwest

For Ornamental Invaders or for Rangeland Invaders

African Rue
Peganum harmala L.

Camelthorn
Alhagi pseudalhagi (Bieb) Desv.

Dalmatian Toadflax
Scrophulariaceae

Hoary Cress
Cardaria draba (L.) Desv.

Leafy Spurge
Euphorbia esula L.

Musk Thistle
Carduus natuans L.

Perennial Pepperweed
Lepidium latifolium L.

Purple Loosestrife
Lythrum salicaria L.

Russian Knapweed
Acroptilon repens L.

Spotted Knapweed
Centaurea maculosa Lam.

Yellow Starthistle
Centaurea solstitialis L.

Yellow Toadflax
Linaria vulgaris Mill.