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  • Washington State Noxious Weed Control Board
    Spotted knapweed is a very aggressive species that can quickly infest large areas Knapweed infestations increase production costs for ranchers, degrade wildlife habitat, decrease plant diversity, increase soil erosion rate and pose wildfire hazards
  • Centaurea nigra - Wikipedia
    Centaurea nigra is a species of flowering plant in the family Asteraceae, and is also known as lesser knapweed, common knapweed, black knapweed and bell weed
  • Spotted Knapweed | Cornell Weed Identification
    Spotted Knapweed (Centaurea maculosa) is a biennial or short-lived perennial that is commonly found throughout the northeast and central-north of the US This weed typical grows on dry, low-fertility soils, and is a problem in New York pastures and disturbed areas
  • Common knapweed - The Wildlife Trusts
    Common knapweed, also known as 'black knapweed', is a thistle-like plant that can be found on all kinds of grasslands, from roadside verges to woodland rides, clifftops to lawns
  • Centaurea stoebesubsp. micranthos, spotted knapweed
    ative, invasive forb in parts of the United States It can occur in dense monocultures that displace native plants; reduce native plant and animal diversity; reduce native wildlife habitat and forage; alter soil physical and chemical properties; and inc ease surface water runoff and stream sedimentation It is most invasive in grasslands
  • Knapweed: Pictures, Flowers, Leaves Identification | Centaurea nigra
    Knapweed (Centaurea nigra) is wild, edible and nutritious food Identify knapweed via its pictures, habitat, height, flowers and leaves
  • Knapweeds – Renz Weed Science
    Knapweeds are herbaceous biennials or perennials Seedlings emerge throughout the growing season and rosettes persist year-round Knapweeds bloom in summer with white to purple flowers As part of the aster family, knapweeds have composite flowers with each flowerhead made up of many tiny florets
  • Spotted Knapweed - Native Plants and Ecosystem Services
    The pages listed below contain information on how to identify and manage spotted knapweed and the potential to use native plants to supply summer nectar and pollen flows
  • Spotted knapweed (Centaurea stoebe subspecies micranthos)
    Spotted knapweed is a biennial or short-lived perennial herbaceous plant that grows two to three feet tall It can form dense cover in prairies, pastures, and open habitats
  • Spotted knapweed - Extension at the University of Minnesota
    Spotted knapweed (Centaurea stoebe) is a short-lived (two to five years) perennial herbaceous plant, two to four feet high Can persist as a rosette for one to four years





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