Common name

Scientific name

Designated for control in:

Austrian fieldcress

Rorippa austriaca

All of Region 1

Annual bugloss

Anchusa arvensis

All of Region 1

Blueweed

Echium vulgare

All of Region 1

Brazilian elodea

Egeria densa

Clallam County only

Camelthorn

Alhagi maurorum

All of Region 1

Cordgrass, common

Spartina anglica

All of Region 1

Cordgrass, smooth

Spartina alterniflora

All of Region 1

Dalmatian toadflax

Linaria dalmatica ssp. dalmatica

All of Region 1

Eurasian watermilfoil

Myriophyllum spicatum

All of Region 1

Fanwort

Cabomba caroliniana

All of Region 1

Gorse

Ulex europaeus

All of Region 1

Hawkweed, mouseear

Hieracium pilosella

All of Region 1

Hawkweed, orange

Hieracium aurantiacum

All of Region 1

Hawkweed, polar

Hieracium atratum

All of Region 1

Hawkweed, smooth

Hieracium laevigatum

All of Region 1

Hawkweed, queendevil

Hieracium glomeratum

All of Region 1

Hawkweed, yellow

Hieracium caespitosum

All of Region 1

Hawkweed oxtongue

Picris hieracioides

All of Region 1

Hedgeparsley

Torilis arvensis

All of Region 1

Hoary alyssum

Berteroa incana

All of Region 1

Indigobush

Amorpha fruticosa

All of Region 1

Knapweed, black

Centaurea nigra

All of Region 1

Knapweed, brown

Centaurea jacea

All of Region 1

Knapweed, diffuse

Centaurea diffusa

All of Region 1

Knapweed, meadow

Centaurea jacea x nigra

All of Region 1

Knapweed, Russian

Acroptilon repends

All of Region 1

Knapweed, spotted

Centaurea biebersteinii

All of Region 1

Parrotfeather

Myriophyllum aquaticum

All of Region 1

Kochia

Kochia scoparia

Clallam County only

Leafy spurge

Euphorbia esula

All of Region 1

Lepyrodiclis

Lepyrodiclis holosteoides

All of Region 1

Longspine sandbur

Cenchrus longispinus

All of Region 1

Loosestrife, garden

Lysimachia vulgaris

All of Region 1

Loosestrife, purple

Lythrum salicaria

All of Region 1

Loosestrife, wand

Lythrum virgatum

All of Region 1

Perennial sowthistle

Sonchus arvensis ssp. arvensis

All of Region 1

Policeman's helmet

Impatiens glandulifera

All of Region 1

Puncturevine

Tribulus terrestris

Clallam County only

Rush skeletonweed

Chondrilla juncea

All of Region 1

Saltcedar

Tamarix ramosissima

All of Region 1

Sulfur cinquefoil

Potentilla recta

All of Region 1

Swainsonpea

Sphaerophysa salsula

All of Region 1

Thistle, musk

Carduus natans

All of Region 1

Thistle, plumeless

Carduus acanthoides

All of Region 1

Thistle, Scotch

Onopordum acanthium

All of Region 1

Water primrose

Ludwigia hexapetala

All of Region 1

White bryony

Bryonia alba

All of Region 1

Wild chervil

Anthriscus sylvestris

All of Region 1

Yellow floating heart

Nymphoides peltata

All of Region 1

Yellow nutsedge

Cyperus esculentus

All of Region 1

Yellow starthistle

Centaurea solstitialis

All of Region 1