Field Guide to Noxious and Other Selected Weeds of British Columbia

Diffuse Knapweed
(Centaurea diffusa)


  • Provincial Noxious Weed

  • biennial to short-lived heavily branched taprooted perennial growing from 0.6 to 1 metre in height; divided leaves grayish-green in colour, hairy; very bitter to the taste

  • white, occasionally purple flowers; bracts of the flowerheads with small, sharp, rigid spines

  • one of 13 "knapweed" species in British Columbia
Rigid spines on tips of flower bracts
Bolting plant

More information on diffuse knapweed (Weeds BC)
Knapweed - Its cost to British Columbia
Return to Field Guide to Noxious and Other Selected Weeds of BC


 

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