Polygonum amphibium; Wasser-Kn鰐erich; Polygonum amphibium (alte Namen) -- Familie Kn鰐erichgew鋍hse (Polygonaceae); Wasser-Kn鰐erich; Persicaria amphibia (L.) Delarbre; Persicaria amphibia; L.; Wasser-Kn鰐erich; Persicaria amphibia; Pflanzenart aus der Familie der Kn鰐erichgew鋍hse. Je nach Standortverh鋖tnissen; Wasserstand; bildet er Wasser-; Landformen aus.; other Syn.; Polygonum amphibium L. (basionym); Polygonum amphibium var. emersum Michx.; Polygonum coccineum Muhl. ex Willd.; Vogelkn鰐eriche; Polygonum; Syn. Duravia; S. Watson; Greene; sind eine Pflanzengattung aus der Familie der Kn鰐erichgew鋍hse; Polygonaceae.; Polygonum amphibium - old Names; Family Polygonaceae; Persicaria amphibia (L.) Delarbre; 1. also amphibious bistort; water persicaria; willow-grass; 1. Polygonum amphibium; Synonyms; Polygonum amphibium; Persicaria amphibia; syn. Polygonum amphibium; is a species of flowering plant in the knotweed family known by several common names; including longroot smartweed; water knotweed; water smartweed; and amphibious bistort. It is native to much of North America and Eurasia; but it is known on most continents as an introduced species and sometimes a noxious weed.; other Syn.; Polygonum amphibium L. (basionym); Polygonum amphibium var. emersum Michx.; Polygonum coccineum Muhl. ex Willd.; Polygonum; genus in the Polygonaceae family. Common names include knotweed; knotgrass; bistort; tear-thumb; mile-a-minute; and several others like ars-smerte.