Ground Ivy, a non-native and invasive species, has been added to the USWildflowers database (08/14/2010.)  Scientific name is Glechoma hederacea.  This plant also is known by the common names Gill-over-the-ground, Haymaids, Creeping Charlie, and a few other unkind epithets.  Photo below was taken in our neighborhood in Walker County, GA on 04/04/2010.

Ground Ivy - Glechoma hederacea