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Polygonum (Genus) - knot grass ..Polygonum alpinum (Species) - Alaska wild rhubarb ..Polygonum amphibium (Species) - water knotweed ..Polygonum amplexicaule (Species) ..Polygonum arenastrum (Species) - common knotweed ..Polygonum aubertii (Species) - Chinese fleecevine ..Polygonum aviculare (Species) - prostrate knotweed ..Polygonum bistorta (Species) - meadow bistort ..Polygonum boreale (Species) - northern knotweed ..Polygonum cognatum (Species) ..Polygonum foliosum (Species) ..Polygonum hydropiper (Species) - annual smartweed ..Polygonum idaeum (Species) ..Polygonum lapathifolium (Species) - curltop ladysthumb ..Polygonum longipes (Species) ..Polygonum maritimum (Species) ..Polygonum minus (Species) ..Polygonum mite (Species) ..Polygonum oxyspermum (Species) - sharpfruit knotweed ..Polygonum patulum (Species) - Bellard's smartweed ..Polygonum persicaria (Species) - ladysthumb ..Polygonum polystachyum (Species) - cultivated knotweed ..Polygonum sagittatum (Species) - arrowleaf knotweed ..Polygonum salicifolium (Species) - knotweed ..Polygonum vivax (Species) ..Polygonum viviparum (Species) - alpine bistort ..Polygonum rurivagum (Species)

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Last updated: 28 Aug 2026