Can you show an enlargement of one of the leaves? And maybe one of a flower, which seems to have a sort of button in the centre. I'ts very pretty, no wonder you would like some more.
It's really delicate and pretty. Percy Thrower I am not but it almost looks lily like. So hard to see it properly from the photo. If you find out, please tell me. I'd like to get one.
ps- If you can't remember planting it, hope it's not a weed!!!!
I don't think it is Japanese Anemone, the leaves are wrong. The leaves do look a bit like Himalayan Balsam, but not the flowers - I hope! Himalayan balsam
Ive had this plant for 18yrs..bought it from Geoff Hamiltons garden-Barnsdale...its endured a house move and repeated chopping to give clumps away to friends..and beautiful perfume ?