Butterweed, a native species, has been added to the USWildflowers database (04/06/2012.) Scientific name is Packera glabella. Photo below was taken in Walker County, GA, on April 2, 2012. It is also known by the common names Yellowtop, Cressleaf Groundsel, and Floodplain Ragwort . Go to the Butterweed detail page for more information.