Dune Sunflower, a native species, has been added to the USWildflowers database (01/20/2012.) Scientific name is Helianthus debilis.  Photo below was taken in Bradenton Beach, Manatee County, FL , on December 20, 2011.  Go to the Dune Sunflower detail page for more photos and information.

Dune Sunflower, Beach Sunflower, Cucumberleaf Sunflower, East Coast Dune Sunflower, Branching Sunflower – Helianthus debilis