Anemone

Happy Friday blippers!  

Was doing a bit of weeding this afternoon and came across this really unusual anemone.  I have lots of anemones in my garden, they seem to like the soil ( or the general level of unkemptness) but they are all bog standard purple ones which self seed around the place. 
I've never seen one with green petals or this unusual pattern of colours, has anybody come across one of these before? 
If not, I will save the seed, sell it to a plant breeder and make my fortune!