Species
Persicaria amphibia (Water smartweed)
Persicaria amphibia. Photo: (c) erik_p, some rights reserved (CC BY-NC)
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, Asia, Europe, and parts of Africa, and it is known elsewhere as an introduced species and sometimes a noxious weed.
Sightings
CLICK TO MANAGE