Small bugloss is a branching, leafy annual covered with stiff hairs that grow 1-3 feet tall.
Plumeless thistle can grow over 5 feet tall on spiny-winged stems.
A shrubby biennial plant that can grow 2-3 feet tall and 2-3 feet wide.
An annual or biennial plant that grows 1-2 feet tall on stiff, branching stems.
Black henbane is a native plant of Europe commonly found in waste areas, pastures, along rights-of-way, and fence lines.
Damage can reduce stand density and provide excellent control.
C. achates can kill knapweed plants in a single year, but populations are often not dense enough to reduce entire stands of knapweed.
diffuse knapweed inhabits dry rangeland, roadsides, field edges, and waste areas.
A winter annual
This 109 page field guide is the fourth edition updated for 2017. It contains dozens of color photos and color maps identifying Utah’s 54 state noxious weeds in their new state classification listing. To order this field guide, please visit USU Extension Publications website.
