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Region 10 Class B Weed Designates

Region 10  contains all lands lying within the boundaries of:

  • Asotin, Garfield, Columbia, and Walla Walla counties

  • Franklin County and east of Highway 395

Common name

Scientific name

Designated for control in:

alyssum, hoary

Berteroa incana

All of Region 10

arrowhead, grass-leaved

Sagittaria graminea

All of Region 10

blackgrass

Alopecurus myosuroides

All of Region 10

blueweed

Echium vulgare

All of Region 10

broom, Scotch

Cytisus scoparius

All of Region 10

bryony, white

Byronia alba

Franklin County in Region 10

bugloss, common

Anchusa officinalis

All of Region 10

camelthorn

Alhagi maurorum

Franklin, Columbia, Garfield and Asotin counties

carrot, wild

Daucus carota

Region 10, except Walla Walla County (except where intentionally cultivated)

catsear, common

Hypochaeris radicata

All of Region 10

chervil, wild

Anthriscus sylvestris

All of Region 10

cinquefoil, sulfur

Potentilla recta

All of Region 10

cordgrass, smooth

Spartina alterniflora

All of Region 10

cordgrass, common

Spartina anglica

All of Region 10

daisy, oxeye

Leucanthemum vulgare

All of Region 10

elodea, Brazilian

Egeria densa

All of Region 10

fanwort

Cabomba caroliniana

All of Region 10

fieldcress, Austrian

Rorippa austriaca

Region 10, except within the Palouse River Canyon from Big Palouse Falls to the Snake River

floating heart, yellow

Nymphoides peltata

All of Region 10

gorse

Ulex europaeus

All of Region 10

hawkweed, mouseear

Hieracium pilosella

All of Region 10

hawkweed, orange

Hieracium aurantiacum

All of Region 10

hawkweed, polar

Hieracium atratum

All of Region 10

hawkweed queen-devil

Hieracium glomeratum

All of Region 10

hawkweed, smooth

Hieracium laevigatum

All of Region 10

hawkweed, yellow

Hieracium caespitosum

All of Region 10

hedgeparsley

Torilis arvensis

All of Region 10

helmet, policeman's

Impatiens gladulifera

All of Region 10

herb-Robert

Geranium robertianum

All of Region 10

indigobush

Amorpha fruticosa

Region 10, except within 200 feet of the Snake River from Central Ferry downstream

Region 10, except within 200 feet of the Columbia River

knapweed, black

Centaurea nigra

All of Region 10

knapweed, brown

Centaurea jacea

All of Region 10

knapweed, diffuse

Centaurea diffusa

Franklin County of Region 10

knapweed, meadow

Centaurea jacea x nigra

All of Region 10

knapweed, Russian

Acroptilon repens

Region 10, except Franklin County

knapweed, spotted

Centaurea biebersteinii

Region 10, except Garfield County

lepyrodiclis

Lepyrodiclis holosteoides

All of Region 10

loosestrife, garden

Lysimachia vulgaris

All of Region 10

loosestrife, purple

Lythrum salicaria

Region 10, except Walla Walla County

loosestrife, wand

Lythrum virgatum

Region 10, except Walla Walla County

nutsedge, yellow

Cyperus esculentus

Region 10, except Walla Walla County

oxtongue, hawkweed

Picris hieracioides

All of Region 10

parrotfeather

Myriophyllum aquaticum

All of Region 10

pepperweed, perennial

Lepidium latifolium

All of Region 10

primrose, water

Ludwigia hexapetala

All of Region 10

ragwort, tansy

Senecio jacobaea

All of Region 10

saltcedar

Tamarix ramosissima

Region 10, except Franklin County (unless intentionally established prior to 2004)

skeletonweed, rush

Chondrilla juncea

Asotin County

Garfield County south of Highway 12

Columbia County from the Walla Walla County line on Highway 12, and

  • all areas south of Turner Road

  • at Turner Road to the Garfield County line

  • all areas south and east of Turner Road

sowthistle, perennial

Sonchus arvensis ssp. arvensis

All of Region 10

spurge, leafy

Euphorbia esula

All of Region 10

starthistle, yellow

Centaurea solstitialis

All lands lying within Asotin County in Region 10, except:

  • T11N, R44E, Sections 25-29 and 31-35

  • T11N, R45E, Sections 21, 22, 23, and 25

  • T11N, R36E, Sections 19-21, and 28-33

  • T10N, R44E, Sections 1-6, 8-12, 15, and 16

  • T10N, R45E, Sections 23 and 24

  • T10N, R46E, Sections 7, 8, 17-22, 27, 34m and 35

  • T9N, R46E, Sections 1, 2, 12, 13, 23-26, 35, and 36

  • T9N,  R47E, Sections 18, 19, 30, and 31

  • T8N, R46E, Sections 1, 2, 3, 9, 10-16, 23 and 24

  • T8N, R47E, Sections 8, 17-20, 29, 30, 31, and 32

swainsonpea

Sphaerophysa salsula

Columbia, Garfield, Asotin, and Franklin counties

thistle, musk

Carduus natans

All of Region 10

thistle, plumeless

Carduus acanthoides

All of Region 10

thistle, Scotch

Onopordum acanthium

Franklin County only

toadflax, Damlatian

Linaria dalmatica ssp. dalmatica

All of Region 10

watermilfoil, Eurasian

Myriophyllum spicatum

All of Region 10