Southern Yellow Loosestrife, a native species, has been added to the USWildflowers database (11/22/2013.) Scientific name is Lysimachia tonsa.  It is also known as Appalachian Loosestrife, and Southern Loosestrife.  Photo below was taken along the Sitton’s Gulch Trail, Cloudland Canyon State Park, Dade County, GA, on Jul 9, 2013.  Go to the Southern Yellow Loosestrife detail page for more photos and information.

Southern Yellow Loosestrife – Lysimachia tonsa