Polygonum Sp - Pale persicaria?

Polygonum Sp  -  Pale persicaria?

Observation - Polygonum Sp - Pale persicaria? - UK and Ireland. Description: Leaf stalks short or 70cms high. Growing in water and on damp bank. No flow

Leaf stalks short or <2cms some <0.5cms, not winged, no black mark on leaves which some >18cms long, edges fringed with forward pointing hairs, top and bottom hairless. Stems branched and reddening >70cms high. Growing in water and on damp bank. No flowers found. Not peppery when chewed. Found more on a dry bank by river with red distorted leaves as on 4th photo. None found flowering so far.