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Persicaria glabra

Denseflower knotweed

Polygonum glaucum

Seaside knotweed

Persicaria hispida

Persicaria hydropiper

Marsh-pepper smartweed

Persicaria longiseta

Bristly lady's-thumb

Persicaria hydropiperoides

False water-pepper

Polygonum minimum

Broadleaf knotweed

Persicaria orientalis

Prince's-feather

Polygonum oxyspermum

Strand-vogelknöterich

Persicaria sagittata

American tearthumb

Polygonum patulum

Polygonum polygaloides

Polygala knotweed

Senecio laevis

Mikania cutervensis

Persicaria virginiana

Jumpseed

Polymnia canadensis

Whiteflower leafcup

Polypodium hesperium

Western polypody

Polypodium virginianum

Rock polypody

Polypogon maritimus

Mediterranean beard grass

Polypodium calirhiza