Random Plant: Cup plant

Cup plant (Silphium perfoliatum, Asteraceae), photographed 08/03/2009 in a floodplain forest near Blissfield Michigan.

I found this cup plant (Silphium perfoliatum, Asteraceae) noteworthy because of the interesting leaf arrangement.  The broad, opposite, coarsely toothed leaves come together at the stem in a cup shape (presumably what gives it its common name):

Closeup of the leaves of a cup plant.

The flower is your standard yellow composite:

Flower of a cup plant.

According to the USDA, this is a threatened species in Michigan.  To me, that makes it a cool find.  At the same time, it’s apparently listed as an invasive/banned weed in Connecticut.

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About Jeremy Sell

Science and nature nerd.
This entry was posted in Botany, Random Plant and tagged , . Bookmark the permalink.

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