Southern Red Trillium, a native species, has been added to the USWildflowers database (4/27/2014.)  Scientific name is Trillium sulcatum. Photo below was taken at the Cloudland Canyon State Park in Dade County, GA, on Apr 16, 2014. Go to the Southern Red Trillium detail page for more photos and information.

Southern Red Trillium – Trillium sulcatum