Polygonaceae
Persicaria
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Persicaria wallichii Greuter & Burdet var. wallichii
= Koenigia polystachya
(Wall. ex Meisn.) T.M.Schust. & Reveal
= Polygonum polystachyum
Wallich ex Meisner
= Reynoutria polystachya
(Wallich ex Meisner) Moldenke
Himalayan knotweed, garden smartweed
Introduced
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