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Asteraceae

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Silphium

Gordon C. Tucker
Silphium

Gordon C. Tucker
Silphium

Gordon C. Tucker
Silphium

Gordon C. Tucker
Silphium

Gordon C. Tucker
Silphium

Gordon C. Tucker
Silphium

Gordon C. Tucker
Silphium

Gordon C. Tucker
Silphium

Gordon C. Tucker
Silphium integrifolium Michx.

Gordon C. Tucker
Silphium integrifolium Michx.

Gordon C. Tucker
Silphium integrifolium Michx.

Gordon C. Tucker
Silphium integrifolium Michx.

Gordon C. Tucker
Silphium integrifolium Michx.

Gordon C. Tucker
Silphium integrifolium Michx.

Jennifer Ward
Silphium integrifolium var. deamii L.M. Perry

Gordon C. Tucker
Silphium laciniatum L.

Jason Haas
Silphium laciniatum L.

N. L. Owens
Silphium laciniatum L.

Gordon C. Tucker
Silphium laciniatum L.

Gordon C. Tucker
Silphium laciniatum L.

Jennifer Ward
Silphium laciniatum L.

Jennifer Ward
Silphium perfoliatum L.

Cris Thomas
Silphium perfoliatum L.

Hiram F. Thut
Silphium perfoliatum L.

Gordon C. Tucker