Silphium integrifolium Michx.
Family: Asteraceae
prairie rosinweed,  more...
Silphium integrifolium image
Merel R. Black  
Etymology: Silphium: old Greek generic name referring to resinous juice
Plants: erect, perennial, 2'-6' tall forb; stems leafy, cylindrical in X-section
Leaves: mostly opposite but not surrounding the stem, lower and upper leaves about the same size
Flowers: head 2"-3" wide with 16-33 (usually 21 or 34) yellow rays 3/4"-1" long; disk usually 1/2"-1" wide; inflorescence of many heads in large, branched clusters; blooms July-Sept.
Fruits: dry seed with no fluffy pappus
Habitat: full sun; dry, moderate moisture to wet; prairies, meadows; in sandy, loamy soil
Silphium integrifolium image
Kenneth J. Sytsma  
Silphium integrifolium image
Merel R. Black  
Silphium integrifolium image
Christopher Noll  
Silphium integrifolium image
Merel R. Black  
Silphium integrifolium image
Merel R. Black  
Silphium integrifolium image
Paul Drobot  
Silphium integrifolium image
Paul Drobot  
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Silphium integrifolium image
Aaron_Carlson  
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Hugh H. Iltis  
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Paul Drobot  
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Robert R. Kowal  
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Aaron Carlson  
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Aaron_Carlson  
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Aaron_Carlson  
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Paul Drobot  
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Paul Drobot  
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Aaron Carlson  
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Aaron_Carlson  
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Aaron_Carlson  
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Margery Melgaard  
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Christopher Noll  
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Silphium integrifolium image
Silphium integrifolium image
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Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
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Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
Silphium integrifolium image
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