Polygonum

Polygonum subaphyllum

Polygonum sumatranum

Polygonum sylvaticum

Polygonum tachengense

Polygonum tatewakianum

Polygonum tenuissimum

Polygonum turkestanicum

Polygonum uniflorum

Polygonum volchovense

Polygonum × pseudobellardii

Polygonum × pseudopulchellum

Polygonum oxyspermum subsp. raii

Polygonum ramosissimum subsp. ramosissimum

Polygonum aviculare subsp. aviculare

Polygonum aviculare

Prostrate knotweed

Polygonum sawatchense subsp. sawatchense

Polygonum agyrocoleon

Polygonum argyrocoleum

Polygonum baldshuanicum

Polygonum arenarium

European knotweed