Hi, I've lost the tag for this plant & a friend is wanting some but I'd like to give her the name of it also. Hopefully someone here can help me. The flowers for it come out the top & form little red seeds.



TIa for your help.
Jan in Central Illinois

Persicaria "Lance Corporal" but I don't think it is called Persicaria anymore. common name Knotweed. It spreads a lot but is easy to pull out

Thank you jvdubb, that is the name that was on it when it was given to me. Really appreciate your quick answer.