Common name

Scientific name

Designated for control in:

alyssum, hoary

Berteroa incana

All of Region 6

arrowhead, grass-leaved

Sagittaria graminea

All of Region 6

blackgrass

Alopecurus myosuroides

All of Region 6

blueweed

Eichium vulgare

All of Region 6

broom, Scotch

Cytisus scoparius

All of Region 6

bryony, white

Byronia alba

All of Region 6

bugloss, common

Anchusa officinalis

All of Region 6

bugloss, annual

Anchusa arvensis

 All of Region 6

camelthorn

Alhagi maurorum

Region 6, except those portions of Section 23, 24, 25, and 29-36, T16N, R27E, W.M. lying outside Intercounty Weed District 52 and except Sections 1-12, T15N, R27E, W.M. in Grant County, and except the area west of Highway 17 and north of Highway 26 in Adams County

carrot, wild

Daucus carota

Region 6, except Yakima County (except where intentionally cultivated)

catsear, common

Hypochaeris radicata

All of Region 6

chervil, wild

Anthriscus sylvestris

All of Region 6

cinquefoil, sulfur

Potentilla recta

Region 6, except Yakima County

cordgrass, smooth

Spartina alterniflora

All of Region 6

cordgrass, common

Spartina anglica

All of Region 6

daisy, oxeye

Leucanthemum vulgare

Region 6, except those areas lying within Yakima and Kittitas counties west of Range 13E

elodea, Brazilian

Egeria densa

All of Region 6

fanwort

Cabomba caroliniana

All of Region 6

fieldcress, Austrian

Rorippa austriaca

All of Region 6

floating heart, yellow

Nymphoides peltata

All of Region 6

gorse

Ulex europaeus

All of Region 6

hawkweed, mouseear

Hieracium pilosella

All of Region 6

hawkweed, orange

Hieracium aurantiacum

All of Region 6

hawkweed, polar

Hieracium atratum

All of Region 6

hawkweed queen-devil

Hieracium glomeratum

All of Region 6

hawkweed, smooth

Hieracium laevigatum

All of Region 6

hawkweed, yellow

Hieracium caespitosum

All of Region 6

hedgeparsley

Torilis arvensis

All of Region 6

helmet, policeman's

Impatiens gladulifera

All of Region 6

herb-Robert

Geranium robertianum

All of Region 6

indigobush

Amorpha fruticosa

All of Region 6

knapweed, black

Centaurea nigra

Region 6 except Kittitas County

knapweed, brown

Centaurea jacea

Region 6 except Kittitas County

knapweed, diffuse

Centaurea diffusa

Grant County lying in:

• Townships 13-16 North, Ranges 25-27 East

• Townships 17 and 18N, Ranges 25-30 East

• Townships 19 and 20 North, Ranges 29 and 30 East

• T21N, R23E, Sections 1-30

• T21N, R26E, Sections 5, 6, 7, 8, 17, and 18

• East 1/2 Township 21 N Range 27E

• T21N, Ranges 28-30 E

• those portions of Townships 22-28N, Ranges 28-30E

• those portions of Townships 28-30E lying in Grant County

• All W.M.

knapweed, meadow

Centaurea jacea x nigra

Region 6 except Kittitas County

knapweed, Russian

Acroptilon repens

Adams County of Region 6, except for the area west of Highway 17 and north of Highway 26

knapweed, spotted

Centaurea biebersteinii

All of Region 6

knotweed, Bohemian

Polygonum bohemicum

Kittitas County of Region 6 and Chelan and Douglas counties of Regions 3 and 6

knotweed, giant

Polygonum sachalinense

Kittitas County only

knotweed, Himalayan

Polygonum polystachyum

Kittitas County only

knotweed, Japanese

Polygonum cuspidatum

Kittitas County only

Kochia

Kochia scoparia

Kittitas County only

lepyrodiclis

Lepyrodiclis holosteoides

All of Region 6

loosestrife, garden

Lysimachia vulgaris

All of Region 6

loosestrife, purple

Lythrum salicaria

Region 6, except that portion of Grant County lying:

• northerly of the Frenchman Hills-O'Sullivan Dam Road

• southerly of Highway Interstate 90

• easterly of the section line of the location of County Road J SW/NW, if constructed

• westerly of the section line of the location of County Road H SE/NE, if constructed

loosestrife, wand

Lythrum virgatum

 Region 6, except that portion of Grant County lying:

• northerly of the Frenchman Hills-O'Sullivan Dam Road

• southerly of Highway Interstate 90

• easterly of the section line of the location of County Road J SW/NW, if constructed

• westerly of the section line of the location of County Road H SE/NE, if constructed

nutsedge, yellow

Cyperus esculentus

Region 6 except those areas lying between State Highway 26 and State Highway 28, and westerly of Dodson Road in Grant County, and except S 1/2, Sec. 2, T20N, R25E, W.M.

oxtongue, hawkweed

Picris hieracioides

All of Region 6

parrotfeather

Myriophyllum aquaticum

All of Region 6

pepperweed, perennial

Lepidium latifolium

Kittitas County, Adams County, except for the area west of Highway 17 and north of Highway 26

primrose, water

Ludwigia hexapetala

All of Region 6

puncturevine

Tribulus terrestris

Kittitas County only

ragwort, tansy

Senecio jacobaea

All of Region 6

saltcedar

Tamarix ramosissima

All of Region 6, unless intentionally established prior to 2004

sandbur, longspine

Cenchrus longispinus

Adams County of Region 6, except for that area lying within Intercounty Weed District No. 52 Kittitas County

skeletonweed, rush

Chondrilla juncea

Region 6, except that portion lying within Grant County that is:

• southerly of State Highway 28

• northerly of Interstate Highway 90

• easterly of Grant County Road 1 Northwest

sowthistle, perennial

Sonchus arvensis ssp. arvensis

Adams County of Region 6 only

spurge, leafy

Euphorbia esula

All of Region 6

starthistle, yellow

Centaurea solstitialis

All of Region 6

swainsonpea

Sphaerophysa salsula

Weed District 3 of Grant County Adams County

thistle, musk

Carduus natans

All of Region 6

thistle, plumeless

Carduus acanthoides

All of Region 6

thistle, Scotch

Onopordum acanthium

All of Region 6

toadflax, Damlatian

Linaria dalmatica ssp. dalmatica

Kittitas, Chelan, Douglas, and Adams counties of Region 6 only Weed District No. 3 of Grant County

watermilfoil, Eurasian

Myriophyllum spicatum

Adams County only