Nakedflower Ticktrefoil, a native species, has been added to the USWildflowers database (10/16/2012.) Scientific name is Desmodium nudiflorum.  Photo below was taken in Walker County, GA on June 16, 2012. Go to the Nakedflower Ticktrefoil detail page for more photos and information.

Nakedflower Ticktrefoil, Naked-Flowered Tick Trefoil, Naked-stemmed Tick Clover – Desmodium nudiflorum