Hawkweed 2

This is a very invasive weed but really very pretty close up.  The cluster of flowers on each stalk are all different colours and designs - a candidate for breeding improvement perhaps?  
 It self seeds everywhere and also sends out runners into every nook and cranny so you have to be ruthless or it will take over.  But I think I will let it flower for a bit longer before I set to with the weeding.