Ten-petal Sunflower, a native species, has been added to the USWildflowers database (09/23/2011.) Scientific name is Helianthus decapetalus. Photo below was taken in Grundy County, TN on September 17, 2011. Go to the Ten-petal Sunflower detail page for more photos and information.
Ten-Petal Sunflower – Helianthus decapetalus – Added to USWildflowers Database
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