Polygonum

Polygonum greenii

Polygonum austiniae

Polygonum sawatchense

Polygonum spergulariiforme

Polygonum aviculare var. erectum

Polygonum pensylvanicum subsp. oneillii

Polygonum graminifolium

Polygonum oxyspermum subsp. oxyspermum

Polygonum paronychioides

Polygonum shastense

Shasta knotweed

Polygonum tenue

Pleatleaf knotweed