This photo shows the flowerhead of <i><a href="//commons.wikimedia.org/wiki/Centaurea_jacea" title="Centaurea jacea">centaurea jacea</a></i>
Teun Spaans
CC BY 2.5
I took this photo in <a href="//commons.wikimedia.org/wiki/Gouda" title="Gouda">Gouda</a>