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Daucus carota
If you get a chance to look again be sure to notice the very dark purple single flower in the middle of the big white flower.
Also pick a few and put them in a vase with food coloring. Pretty good plant for seeing the color get pulled right into the flower and change it to any color you want. When I was a little kid I was shown these things and thought they were interesting. May not be so exciting for you I suppose.
so it is queen annes lace! thanks for clarificationg subin! i thought it might be.