Swamp Milkweed, a native species, has been added to the USWildflowers database (09/26/2016.) Scientific name is Asclepias incarnata.  Photo below was taken in St Clair County, IL on Aug 23, 2016. Go to the Swamp Milkweed detail page for more information and photos.

Swamp Milkweed – Asclepias incarnata

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