Summary ²

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.

Sources and Credits

1. (c) erik_p, some rights reserved (CC BY-NC), uploaded by erik_p
2. (c) Wikipedia, some rights reserved (CC BY-SA), https://en.wikipedia.org/wiki/Persicaria_amphibia

More Info

• iNat taxon page
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• Biodiversity Heritage Library
• BOLD Systems BIN search
• Calflora
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• eFloras.org
• Flora Digital de Portugal
• Flora of North America (beta)
• Global Biodiversity Information Facility (GBIF)
• Go Botany
• HOSTS - a Database of the World's Lepidopteran Hostplants
• Illinois Wildflowers
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• Jepson eFlora
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• USDA PLANTS database
• VASCAN by Canadensys
• World Flora Online

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