Slender Yellow Wood Sorrel, a native species, has been added to the USWildflowers database (05/27/2013.) Scientific name is Oxalis dillenii. It is also known by the common names Southern Yellow Wood-sorrel, Dillen’s Oxalis. Photo below was taken in Walker County, GA on May 17, 2013. Go to the Slender Yellow Wood Sorrel detail page for more photos and information.