This was growing on a street corner by an abandoned lot in northeast Florida. The plant doesn't reach more than about 6 inches maximum in height.
My first thought was that it might be a form of Baby's Breath (Gypsophila), but the leaves are more like a Queen Anne's Lace (Daucus).
My camera doesn't do closeups very well of such tiny flowers, but if more photos are needed, I will try to get some.
Thanks!
Jeremy