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A rhizomatous, thorny, highly branched herbaceous perennial that grows up to 4 feet tall.

A rhizomatous woody perennial that grows up to 3 feet tall on multiple branches.

Spring milletgrass is an annual that grows 2 1/2 feet tall, with drooping, upright or spreading stems.

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.