Looks like Japanese Anemone. Don't know which one.

Agree, one of the late flowering anemones.

Thanks,it was from our neighbour she had no idea what it was.

I find it a lovely useful plant. It flowers from July to October in sun or shade, not touched by slugs, snails or rabbits. Some people find they're too spready for them or their garden, but I like them.

I've battled with it for years!

looks like september charm. or it could be the species A. huphensis. often used as one of the parents in producing other named varieties.

I've got some dark pink ones, and pure white, and they're absolutely gorgeous. It's also called a windflower. They do spread a lot, but are easily dug up if you don't want them. Annie