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A noxious weed is a plant that is injurious to desired vegetation. Noxious weeds pose a significant threat to agricultural and conservation lands due to their ability to out-compete native species for resources and eventually become the dominant species in an area.

Buckhorn Plaintain

Plantago lanceolata

Buckthorn

Rhamnus frangula

Bull Thistle

Cirsium lanceolatum

Canada Thistle

Cirsium arvense

Cocklebur

Xanthium commune

Field Bindweed

Convolvulus arvensis

Horsenettle

Solanum carolinense

Leafy Spurge

Euphorbia esula

Multiflora Rose

Rosa multiflora

Musk Thistle

Carduus nutans

Perennial Peppergrass

Lepidium draba

Perennial Sowthistle

Sonchus arvensis

Poison Hemlock

Conium maculatum

Puncturevine

Tribulus terrestris

Quackgrass

Agropyron repens

Russian Knapweed

Centaurea repens

Shattercane

Sorghum bicolor

Sheep Sorrel

Rumex acetosella

Smooth Dock

Rumex altissimus

Sour Dock

Rumex crispus

Tall Thistle

Cirsium altissimum

Teasel

Dipsacus spp

Velvetleaf

Abutilon theophrasti

Wild Carrot

Daucus carota

Wild Mustard

Brassica arvensis

Wild Sunflower

Helianthus annus