Knotweed is a common name for plants in several genera in the family Polygonaceae. Knotweed may refer to:
- Fallopia
- Persicaria
- Polygonum
- Reynoutria
- Reynoutria japonica or Japanese knotweed, a highly invasive species in Europe and North America
Index of plants with the same common nameThis page is an index of articles on plant species (or higher taxonomic groups) with the same common name (vernacular name). If an internal link led you here, you may wish to edit the linking article so that it links directly to the intended article. Category: