beautiful polygonum hydropiper pink flowers. water pepper, persicaria hydropiper wild flower

persicaria hydropiper polygonum water pepper marshpepper knotweed smart tade polygonaceae widespread species damp places shallow cultivated varieties pungent flavor tracheophytes longiseta family oriental lady's thumb bristly asiatic smartweed low waterpepper bristled bunchy tufted flower summer grass floral green leaves plant pink herb stem weed botanical blossom outdoors bloom herbal medicine focus close selective medical wild depth field violet purple beautiful flowers water-pepper