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
A succulent, highly-branched herbaceous perennial