Spotted Knapweed

Spotted Knapweed
Centaurea maculosa Lam.
Synonym: C. biebersteinii
Family: Asteraceae, Aster or Composite
Genus: Centaurea ...

Spotted Knapweed
Centaurea biebersteinii (Centaurea stoebe, Centaurea maculosa) ...

Spotted Knapweed
Scientific name: Centaurea stoebe L. subsp. micranthos (Gugler) Hayek
Synonyms: Centaurea biebersteinii auct., Centaurea maculosa auct. Amer., Centaurea maculosa subsp. micranthos Gugler (basionym) ...

BACKGROUND: Spotted knapweed was introduced to North America from Eurasia as a contaminant in alfalfa and possibly clover seed, and through discarded soil used as ship ballast.

Centaurea maculosa.Spotted Knapweed. Spotted knapweed is an invasive weed imported from Eurasia. For more information go to spotted knapweed ecology and control.

Centaurea biebersteinii DC. - spotted knapweed
Centaurea calcitrapa L. - red star-thistle
Centaurea melitensis L. - Maltese star-thistle ...

Centaurea maculosa (Compositae) - I recently saw a potted spotted knapweed for sale for $9.95 (next to the cut goldenrod)...One person's weed... Blooms mid to late summer. (Photographed in WI) ...

Spotted knapweed (Centaurea maculosa)
Spurred anoda (Anoda cristata)
Sulfur cinquefoil (Potentilla recta)
Venice mallow (Hibiscus trionum)
Wild caraway (Carum carvi)
Yellow nutsedge (Cyperus esculentus)
Yellow toadflax (Linaria vulgaris) ...

See also: Centaurea, Knapweed, Aster, Sunflower, Pink