Centaurea jacea L.  
Family: Asteraceae
Brown-Ray Knapweed
Centaurea jacea image
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Keir Morse  
Centaurea jacea image
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Centaurea jacea image
Centaurea jacea image
Centaurea jacea image
Centaurea jacea image
Keir Morse  
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Jeff Heise  
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Mona Terwedow  
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Centaurea jacea image
Mona Terwedow  
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The National Science Foundation
This project made possible by National Science Foundation Award 1410069