Japanese knotweed, a terrestrial herbaceous plant that is in the Polygonaceae family, invades along rivers, streams, roads, and in disturbed areas or where dumped. It prefers full sun and rich soils ...

Giant knotweed, a terrestrial herbaceous plant in the Polygonaceae family, invades along waterways, roads, forest openings, and disturbed sites where dumped. Key characteristics of this invasive ...