Centaurea maculosa

Common Name: 
spotted knapweed
Scientific Name: 
Centaurea maculosa Lam.
Family Name: 
Asteraceae (Compositae) - Aster or Sunflower Family
Identification Notes
Life Cycle
introduced biennial, reproducing by seed
Stems
upright to reclining, relatively slender but tough, hairy or downy, branched throughout
Stems of Spotted Knapweed
Stems of Spotted Knapweed
Stems of Spotted Knapweed
Stems of Spotted Knapweed
Leaves
basal rosette first year, second year alternate; pinnately divided below, segments narrow, smaller above and less divided, surface short haired, margins tough hairs
Leaves of Spotted Knapweed
Leaves of Spotted Knapweed
Flowers
heads of pink to purple (sometimes white) disk (tubulate) florets, bracts fringed with bristly hairs; solitary, terminal loose panicle, axillary above
Flowers of Spotted Knapweed
Flowers of Spotted Knapweed