Connecticut Plants
Spotted Knapweed
Centaurea stoebe L.

Spotted knapweed is one of several species of lavender-flowered knapweeds that grow in Connecticut (none of them native). Spotted knapweed is the most common; it can be distinguished by its deeply cut leaves and its wiry, much-branched stems. Spotted knapweed is an invasive plant that threatens native plant habitats. More on this topic from

  • Synonyms: Centaurea biebersteinii DC., Centaurea maculosa
  • Family: aster (Asteraceae)
  • Habitat: fields, roadsides, waste places
  • Height: 2-3 feet
  • Flower size: flowerheads 1 inch across
  • Flower color: lavender
  • Flowering time: June to August
  • Origin: Europe
Centaurea biebersteinii DC.