Littleleaf Buttercup, a native species, has been added to the USWildflowers database (03/27/2012.) Scientific name is Ranunculus abortivus.  Photo below was taken in Walker County, GA, on March 2, 2012.   It  is also known by the common name Littleleaf Crowfoot.  Go to the Littleleaf Buttercup detail page for more photos and information.

Littleleaf Buttercup, Littleleaf Crowfoot - Ranunculus abortivus