Yellow Starthistle
Centaurea solstitialis

Black Henbane
Hyoscyamus niger

Vipers Bugloss (Blueweed)
Echium plantagineum

Dyer's Woad
Isatis tinctoria

Rush Skeletonweed
Chondrilla juncea

Squarrose Knapweed
Centaurea virgata

Tamarisk (Salt Cedar)
Tamarix ramosissima

Swainsonpea
Sphaerophysa salsula

Potential Weed Invaders

    The following weeds; black henbane, swainsonpea, tamarisk, and diffuse knapweed are present in Carbon County in controllable infestations. The remaining weeds have yet to invade Carbon County. All of these weeds can become a major threat to our environment if not monitored and controlled. Please help us in our efforts to contain these invaders.

Should you encounter any of these weeds please contact the Carbon County Weed and Pest office at: (307) 324-6584

Photo Credits - Joseph M. DiTomaso and Evelyn A. Healy. These photos can be used only for educational purposes. Any other uses requires written permission from Joseph M. DiTomaso.

Diffuse Knapweed
Centaurea diffusa

Common St. Johnswort
Hypericum perforatum