spotted-knapweed-flower

Spotted knapweed flower. Note the distinct dark colored bracts that give the flower bud and seed head the distinct "spotted" look.
Photo from slide show: Biological Control of Noxious Weeds, by Reeves Petrof.

Spotted knapweed above, diffuse knapweed (white) below for comparison.

Spotted knapweed flower and flower buds with a Cyphocleonus achates root boring weevil (one beetle between buds- left of flower and one in background). Photo (by Todd Breitenfeldt) taken during weevil release on Golden Sunlight Mine property near Cardwell, MT, summer 1999. Hand: Loni Shaw, GSM employee.

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