Plants

Marin knotweed

Polygonum marinense

Sea Knotgrass

Polygonum maritimum

Polygonum marretii

Polygonum melihae

Polygonum mersinicum

Polygonum mesembricum

Polygonum mezianum

Polygonum middenorfii

Polygonum milliforme

broad-leaved knotweed

Polygonum minimum

Polygonum minutissimum

Polygonum molliiforme

Polygonum norvegicum

Polygonum novae-var

Nuttall's knotweed

Polygonum nuttallii

Polygonum olivascens

Ray's Knotgrass

Polygonum oxyspermum

Polygonum paniculatum

Polygonum pannosum

Polygonum papillosum

beach knotweed

Polygonum paronychia

Polygonum paronychioides

Parry's knotweed

Polygonum parryi

Polygonum patuliforme

Bellard's smartweed

Polygonum patulum

Polygonum pensylvanicum

Polygonum perigrinatoris

Polygonum persicaria

Polygonum phytolaccifolium

Polygonum pingwuense

Common Knotweed

Polygonum plebeium

Polygonum podlechii

Manyleg knotweed

Polygonum polycnemoides

Milkwort Knotweed

Polygonum polygaloides

Polygonum psammophilum

Polygonum punctatum