Ambrosia trifida L.  
Family: Asteraceae
Great Ragweed
[Ambrosia aptera DC.]
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Frankie Coburn  
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Frankie Coburn  
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Max Licher  
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Max Licher  
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Max Licher  
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Max Licher  
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Max Licher  
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Patrick Alexander  
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Morton Arboretum  
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Morton Arboretum  
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Patrick Alexander  
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Morton Arboretum  
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Patrick Alexander  
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Morton Arboretum  
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The National Science Foundation
This project made possible by National Science Foundation Award 1410069