Robert W. Freckmann Herbarium


  Centaurea biebersteinii DC. image
Photographer: Merel R. Black           

Botancial Illustration

Kenneth J. Sytsma

Kenneth J. Sytsma

Matthew L. Wagner

Margery Melgaard

Merel R. Black

Merel R. Black

Christopher Noll

Christopher Noll

Paul Drobot

Paul Drobot

Robert Bierman

Josh Sulman

Josh Sulman

Josh Sulman
Family Asteraceae
Centaurea biebersteinii DC.
spotted knapweed
Centaurea: ancient Greek plant-name, poetically associated with Chiron, the Centaur, but without wholly satisfactory explanation
biebersteinii: for Baron Friedrich August Marschall von Bieberstein, 19th century German explorer in southern Russia
  Restricted Invasive - Eradicate!  Stop It symbol- click for definition
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Introduced - naturalized; ecologically invasive
Plant: erect, biennial/perennial, 1'-4' tall forb
Flower: head 1" wide with pink to purple disk flowers, starry, loosely thistle-like, bracts (phyllaries) fringed with black "eyelashes"; inflorescence a solitary head at the ends of the many branches; blooms June-Oct.
Leaf:pinnately-divided with narrow lobes
Habitat: dry; disturbed sites; in limy soil
Notes: Plants produces a chemical killing nearby plants. To eradicate- wear gloves to pull or dig; hot burns; herbicide specific to broadleaf or composite weeds
(Glossary)

More Information Natural Communities Herbarium Specimens
All Centaurea list Google- Images or Text

Flora of North America (off site)
Synonyms 
Acosta maculosa auct. non Holub
Centaurea maculosa auct. non Lam.

         
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