Silphium perfoliatum L.  
Family: Asteraceae
cup plant,  more...
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Paul Rothrock  
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Paul Rothrock  
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John Hilty  
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John Hilty  
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John Hilty  
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Paul Rothrock  
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Steve Hurst  
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Kathy M. Davis, University of Florida Herbarium  
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Dill, Isabel  
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