Yellow burst

I can't remember what these flowers are called - you can tell I don't garden! Anyway, I loved the burst of yellow in the centre, surrounded by all those deep pink petals. I saw this at the Green Gate garden centre yesterday, when I called in to ask if I could take some photos. This centre has such a huge variety of plants, including all sorts of roses outside. Our weather has not been good recently, so many of the roses were not at their best, but I managed to find enough to satisfy my photographic urge.