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519 knotweed family species
Polygonum paronychia
Polygonella articulata
Persicaria punctata
Persicaria hydropiperoides
Persicaria hydropiper
Rumex occidentalis
Eriogonum pyrolifolium
Eriogonum thymoides
Rumex britannica
Rumex fueginus
Koenigia davisiae
Reynoutria sachalinensis
Rheum rhabarbarum
Rumex venosus
Bistorta plumosa
Eriogonum androsaceum
Eriogonum pauciflorum
Persicaria extremiorientalis
Rumex triangulivalvis
Eriogonum elatum
Persicaria filiformis
Rumex transitorius
Eriogonum sphaerocephalum
Eriogonum nudum
Rumex longifolius
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