Queen Ann's Lace
(Daucus carota)

Queen Ann's Lace was brought to the United States by settlers from England.  All the flowers in the disk are white, except for a single purple one in the center.  Like many other summer wildflowers, it is a source of nectar for bees and butterflies.  When you pick these flowers, you will smell carrots and understand why another name for this plant is wild carrot.