Polygonum

Polygonum arenarium

European knotweed

Polygonum salsugineum

Polygonum scoparium

Polygonum rurivagum

Polygonum ramosissimum

Polygonum douglasii

Douglas's knotweed

Polygonum oxyspermum

Strand-vogelknöterich

Polygonum glaucum

Seaside knotweed

Polygonum roberti

Polygonum zakirovii

Polygonum libani

Polygonum schistosum

Polygonum oxyspermum subsp. raii

Polygonum maritimum

Sea knotgrass

Polygonum bujedoanum

Polygonum davisae

Polygonum paleaceum

Polygonum tortuosum

Polygonum hickmanii

Polygonum arenastrum subsp. arenastrum