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Polygonoideae (Subfamily) ..Coccolobeae (Tribe) ..Persicarieae (Tribe) ..Rumiceae (Tribe) ..Triplarideae (Tribe) ..Polygoneae (Tribe) ....Atraphaxis (Genus) ....Calligonum (Genus) ....Fallopia (Genus) ....Oxygonum (Genus) ....Polygonum (Genus) - knot grass ....Pteropyrum (Genus)

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Last updated: 28 Aug 2026