Yellow Sweetclover, an introduced species, has been added to the USWildflowers database (04/23/2013.) Scientific name is Melilotus officinalis.  It  is also known by the common names Yellow Melilot, Common Melilot, Field Melilot, Cornilla Real, and White Sweetclover.  Photo below was taken in Walker County, GA, on May 6, 2012.   Go to the Yellow Sweetclover detail page for more information.

Yellow Sweetclover, Field Melilot, Cornilla Real – Melilotus officinalis