Colorado Department of Agriculture

Noxious Weed Alert – Oxeye Daisy
It looks like a pretty flower. In fact, it's a noxious weed. It's the Oxeye Daisy. Governor John Hickenlooper has signed a proclamation declaring July 7th-13th as Colorado Weed Awareness Week.
Noxious Weed Alert – Leafy Spurge
The Colorado Department of Agriculture has identified 74 species of plants in the state that are designated as "noxious," meaning they pose a threat to the state's agricultural productivity, wildlife habitat and native plant communities. One of those noxious weeds is the Leafy Spurge.