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Asteraceae
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Silphium
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Silphium laciniatum
Silphium laciniatum
R. W. Smith
C. Peirce
C. Peirce
R. Schipper
J. Kelly
R. Schipper
R. Schipper
D. Drife
D. Drife
A. A. Reznicek
leaf
R. W. Smith