Spotted Wakerobin, a native species, has been added to the USWildflowers database (3/26/2014.) Scientific name is Trillium maculatum. Photo below was taken at the Wolf Creek Trout Lily Preserve in Grady County, GA, on Feb 19, 2014. Go to the Spotted Wakerobin detail page for more photos and information.
This is a beauty!
Thanks, Mia.