ASTERACEAE

Silphium albiflorum

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Silphium albiflorum habit.jpg (123258 bytes) Silphium albiflorum leaf.jpg (55056 bytes)
habit leaf--the leaves of S. albiflorum are extremely coarse and sandpapery
Silphium albiflorum head.jpg (60422 bytes) Silphium albiflorum phyllaries.jpg (70006 bytes)
head--this is the only member of the genus with white flowers, leading to the epithet albiflorum phyllaries--the phyllaries have sharp, pointed hardened tips