Polygonum

Polygonum aviculare

Prostrate knotweed

Polygonum arenastrum

Oval-leaf knotweed

Polygonum aviculare subsp. aviculare

Common knotweed

Polygonum maritimum

Sea knotgrass

Polygonum douglasii

Douglas's knotweed

Polygonum plebeium

Polygonum ramosissimum

Polygonum bellardii

Narrowleaf knotweed

Polygonum equisetiforme

Horsetail knotweed

Polygonum tenue

Pleatleaf knotweed

Polygonum oxyspermum

Strand-vogelknöterich

Polygonum patulum

Polygonum arenarium

European knotweed

Polygonum paronychia

Polygonum polygaloides

Polygala knotweed

Polygonum erectum

Polygonum spergulariiforme

Polygonum achoreum

Polygonum minimum

Broadleaf knotweed

Polygonum cognatum

Indian knotgrass