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I have got this one,i think it belongs to the bistort family.It flowers for ages.Yours looks really well there.:O)

thank you for the information Suey, it is a very pretty colour and gives a good lot of colour late on in the season. :O)

I like that plant Oliveoil and its great that is flowers for ages:)

I know Nana_d at this time of the season it is good to have this sort of colour in the garden. :O)

Persicaria amplexicaulis.....which variety though I don't know. Insects just love it!! :)

Oh thank you for that info Scottish, thought it was Persicaria but was not sure. :O)

It's a beautiful one!