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Project Noah Nature School
Silphium sp.
some kind of wildflower? spotted near the Mississippi River
is there a way to identify this between Silphium perfoliatum and Silphium integrifolium?
I think this is rosinweed, not indian cup. The leaves appear to be borderline perfoliate, but not nearly as much as in indian cup (http://www.illinoiswildflowers.info/prai... or http://www.missouribotanicalgarden.org/g... for photos of the strongly perfoliate leaves).
Spotted on Jul 30, 2012
Submitted on Jul 30, 2012
