alyssum, hoary

Berteroa incana

All of Region 2

arrowhead, grass-leaved

Sagittaria graminea

Region 2, except Lake Roesiger, Lake Serene, Lake Loma, and Echo Lake in Snohomish County

blackgrass

Alopecurus myosuroides

All of Region 2

blueweed

Echium vulgare

All of Region 2

bryony, white

Byronia alba

All of Region 2

bugloss, common

Anchusa officinalis

All of Region 2

bugloss, annual

Anchusa arvensis

All of Region 2

camelthorn

Alhagi maurorum

All of Region 2

chervil wild

Anthriscus sylvestris

Region 2, except Guemes Island in Skagit County

cinquefoil, sulfur

Potentilla recta

Region 2 except Skagit County

cordgrass, smooth

Spartina alterniflora

Region 2 except Padilla Bay of Skagit County

cordgrass, common

Spartina anglica

Region 2 except bays and estuaries of Skagit and Island counties and except bays and estuaries north of Everett in Snohomish County

fanwort

Cabomba caroliniana

All of Region 2

fieldcress, Austrian

Rorippa austriaca

All of Region 2

floating heart, yellow

Nymphoides peltata

All of Region 2

gorse

Ulex europaeus

Skagit, Island, and Whatcom counties only

hawkweed, mouseear

Hieracium pilosella

All of Region 2

hawkweed, orange

Hieracium aurantiacum

Skagit County only

hawkweed, polar

Hieracium atratum

All of Region 2

hawkweed queen-devil

Hieracium glomeratum

All of Region 2

hawkweed, smooth

Hieracium laevigatum

San Juan, Island, and Skagit counties only

hawkweed, yellow

Hieracium caespitosum

All of Region 2

hedgeparsley

Torilis arvensis

All of Region 2

helmet, policeman's

Impatiens gladulifera

Region 2 except Whatcom County

indigobush

Amorpha fruticosa

All of Region 2

knapweed, black

Centaurea nigra

All of Region 2

knapweed, brown

Centaurea jacea

All of Region 2

knapweed, diffuse

Centaurea diffusa

All of Region 2

knapweed, meadow

Centaurea jacea x nigra

All of Region 2

knapweed, Russian

Acroptilon repens

All of Region 2

knapweed, spotted

Centaurea biebersteinii

All of Region 2

kochia

Kochia scoparia

All of Region 2

lepyrodiclis

Lepyrodiclis holosteoides

All of Region 2

loosestrife, garden

Lysimachia vulgaris

All of Region 2

loosestrife, purple

Lythrum salicaria

Region 2, except for Snohomish County

loosestrife, wand

Lythrum virgatum

Region 2, except for Snohomish County

nutsedge, yellow

Cyperus esculentus

All of Region 2

oxtongue, hawkweed

Picris hieracioides

All of Region 2

parrotfeather

Myriophyllum aquaticum

All of Region 2

pepperweed, perennial

Lepidium latifolium

All of Region 2

primrose, water

Ludwigia hexapetala

All of Region 2

puncturevine

Tribulus terrestris

Skagit County only

saltcedar

Tamarix ramosissima

All of Region 2

sandbur, longspine

Cenchrus longispinus

All of Region 2

skeletonweed, rush

Chondrilla juncea

All of Region 2

sowthistle, perennial

Sonchus arvensis ssp. arvensis

All of Region 2

spurge, leafy

Euphorbia esula

All of Region 2

starthistle, yellow

Centaurea solstitialis

All of Region 2

swainsonpea

Sphaerophysa salsula

All of Region 2

thistle, musk

Carduus natans

All of Region 2

thistle, plumeless

Carduus acanthoides

All of Region 2

thistle, Scotch

Onopordum acanthium

All of Region 2

toadflax, Damlatian

Linaria dalmatica ssp. dalmatica

All of Region 2