Spotted Knapweed - LCCD has compiled a Chemical Handbook to assist producers with noxious weed treatments. 
Lander County Conservation District
Lander County, Nevada

Spotted Knapweed

Spotted Knapweed
Alias: Centaurea maculosa

Distinguishing features:
(information taken from "Weeds of the West," Revised, 1992)

  • One or more stems, branched 1 to 3 feet tall, and grow up to 4 feet tall by the second year of life.
  • Leaves are deeply lobed and can be as long as 6 inches and one inch wide.
  • Flower heads are solitary at the end of each branch with bracts stiff and tipped with a dark comblike fringe.
  • Flowers bloom pinkish-purple (sometimes cream colored, but rare).
  • Seeds are 1/8 inch long, tipped with a tuft of bristles.
see also:
Control Methods for Spotted Knapweed

go to University of Nevada Cooperative Extension Web Site
Natural Resources: Weed Wanted Posters, click Spotted Knapweed

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