Yellow flowers on garden dill?

First time doing dill in the garden. Very hot summer. My dill now looks like the dill in this picture: a href="http://www.mckenzieseeds.com/productimages_large/101302.jpg" rel="nofollow"http://www.mckenzieseeds.com/productimag…/a I use dill in soups. Can I harvest my dill and use it, yellow flowers and all? Is it safe to eat? Can I put the yellow flower part in my soups? Does it taste just like the green leaves part that I harvested when the herb started growing?