Class A Weeds

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The State of Washington through RCW 17.10 has listed the following Class A weeds for eradication statewide. Class A consists of those noxious weeds not native to state that are of limited distribution or are unrecorded in the state and that pose a serious threat to the state. (RCW 17.10.010.2.(a))

Common Name:

Scientific Name

bean-caper, Syrian

Zygophyllum fabago

blueweed, Texas

Helianthus ciliaris

brome, false

Brachypodium sylvaticum

broom, Spanish

Spartium junceum

buffalobur *

Solanum rostratum

bulrush, ricefield

Schoenoplectus mucronatus

clary, meadow

Salvia pratensis

cordgrass, common

Spartina anglica

cordgrass, dense flower

Spartina densiflora

cordgrass, salt meadow

Spartina patens

cordgrass, smooth

Spartina alterniflora

crupina, common

Crupina vulgaris

flax, spurge

Thymelaea passerina

four o'clock, wild

Mirabilis nyctaginea

geranium, shiny

Geranium lucidum

goatsrue

Galega officinalis

hawkweed, European

Hieracium sabaudum

hawkweed, yellow devil

Hieracium floribundum

hogweed, giant *

Heracleum mantegazzianum

hydrilla

Hydrilla verticillata

johnsongrass *

Sorghum halepense

knapweed, bighead *

Centaurea macrocephala

knapweed, Vochin *

Centaurea nigrescens

kudzu

Pueraria montana var. lobata

milfoil, variable-leaf

Myriophyllum heterophyllum

mustard, garlic

Alliaria petiolata

nightshade, silverleaf

Solanum elaeagnifolium

primrose-willow, floating

Ludwigia peploides

rush, flowering

Butomus umbellatus

sage, clary

Salvia sclarea

sage, Mediterranean *

Salvia aethiopis

spurge, eggleaf

Euphorbia oblongata

starthistle, purple

Centaurea calcitrapa

sweetgrass, reed

Glyceria maxima

thistle, Italian

Carduus pycnocephalus

thistle, milk *

Silybum marianum

thistle, slenderflower

Carduus tenuiflorus

velvetleaf *

Abutilon theophrasti

woad, dyers

Isatis tinctoria

Class B-Designate Weeds

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The State of Washington through RCW 17.10 has listed the following Class B weeds as designated for control in Klickitat County. Class B-designate consists of those noxious weeds not native to the state and that are of limited distribution or are unrecorded in a region of the state and whose populations in a region or area are such that all seed production can be prevented within a calendar year.

Common Name

Scientific Name

alyssum, hoary *

Berteroa incana

arrowhead, grass-leaved

Sagittaria graminea

blackgrass

Alopecurus myosuroides

blueweed

Echium vulgare

broom, Scotch *

Cytisus scoparius

bryony, white

Bryonia alba

bugloss, annual

Anchusa arvensis

bugloss, common

Anchusa officinalis

camelthorn

Alhagi maurorum

carrot, wild *

Daucus carota

chervil, wild

Anthriscus sylvestris

daisy, oxeye *

(east of Range 13E)

Leucanthemum vulgare

elodea, Brazilian

Egeria densa

fanwort

Cabomba caroliniana

fennel, common

Foeniculum vulgare

fieldcress, Austrian

Rorippa austriaca

floating heart, yellow

Nymphoides peltata

gorse

Ulex europaeus

hawkweed, mouseear

Hieracium pilosella

hawkweed, orange

Hieracium aurantiacum

hawkweed, polar

Hieracium atratum

hawkweed, queen-devil

Hieracium glomeratum

hawkweed, smooth

Hieracium laevigatum

hawkweed, yellow *

(except T6N, R12E, S32-34; T5N, R12E, S4-7; T5N, R11E, S12)

Hieracium caespitosum

helmet, policeman’s

Impatiens glandulifera

herb-Robert *

Geranium robertianum

indigobush *

(except within 200 feet of the Columbia River)

Amorpha fruticosa

knapweed, black

Centaurea nigra

knapweed, brown

Centaurea jacea

knapweed, meadow *

Centaurea jacea x nigra

knapweed, spotted *

Centaurea stoebe

laurel, spurge

Daphne laureola

lawnweed

Soliva sessilis

lepyrodiclis

Lepyrodiclis holosteoides

loosestrife, garden

Lysimachia vulgaris

loosestrife, purple *

Lythrum salicaria

loosestrife, wand

Lythrum virgatum

nutsedge, yellow *

(except an area lying southerly of SR14 and within T2N, R13 & 14E)

Cyperus esculentus

oxtongue, hawkweed

Picris hieracioides

parrotfeather

Myriophyllum aquaticum

primrose, water

Ludwigia hexapetala

ragwort, tansy *

Senecio jacobaea

reed, common, nonnative

Phragmites australis

saltcedar *

(unless intentionally established prior to 2004)

Tamarix ramosissima

skeletonweed, rush *

(except the Dallesport area – T2N, R13-14E)

Chondrilla juncea

sowthistle, perennial

Sonchus arvensis ssp. arvensis

spurge, leafy *

Euphorbia esula

thistle, musk

Carduus nutans

thistle, plumeless

Carduus acanthoides

thistle, Scotch *

Onopordum acanthium

toadflax, Dalmatian *

(east of Klickitat River)

Linaria dalmatica ssp. dalmatica

watermilfoil, Eurasian *

Myriophyllum spicatum

Class B Weeds

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The Klickitat County Noxious Weed Control Board through RCW 17.10 has listed the following Class B weeds, not designated by the State, to be on the county noxious weed list. Class B consists of those noxious weeds not native to the state that are of limited distribution or are unrecorded in a region of the state and that pose a serious threat to that region. (RCW 17.10.010.2(b))

Common Name

Scientific Name

butterfly bush *

Buddleia davidii

catsear, common *

Hypochaeris radicata

cinquefoil, sulfur *

Potentilla recta

daisy, oxeye *

(west of Range 13E)

Leucanthmum vulgare

hawkweed, yellow *

(T6N, R12E, S32-34; T5N, R12E, S4-7; T5N, R11E, S12)

Hieracium caespitosum

houndstongue *

Cynoglossum officinale

indigobush *

(within 200 feet of the Columbia River)

Amorpha fruticosa

knapweed, diffuse *

Centaurea diffusa

knapweed, Russian *

Acroptilon repens

knotweed, Bohemian

Polygonuym bohemicum

knotweed, giant *

Polygonum sachalinense

knotweed, Himalayan

Polygonum polystachyum

knotweed, Japanese *

Polygonum cuspidatum

kochia *

Kochia scoparia

nutsedge, yellow *

(an area lying south of SR14 and within T2N, R13 & 14E)

Cyperus esculentus

pepperweed, perennial *

Lepidium latifolium

poison-hemlock

Conium maculatum

puncturevine *

Tribulus terrestris

sandbur, longspine *

Cenchrus longispinus

skeletonweed, rush *

(the Dallesport area – T2N, R13-14E)

Chondrilla juncea

spurge, myrtle *

Euphorbia myrsinites L

starthistle, yellow *

Centaurea solstitialis

Swainsonpea *

Sphaerophysa salsula

toadflax, Dalmatian *

(west of Klickitat River)

Linaria dalmatica spp. dalmatica

Class C Weeds

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The Klickitat County Noxious Weed Control Board through RCW 17.10 has listed the following Class C weeds to be designated for control on the county noxious weed list. Class C consists of any other noxious weeds. (RCW 17.10.010.2(c))

Common Name

Scientific Name

archangel, yellow *

Lamiastrum galeobdolon

cocklebur, spiny *

Xanthium spinosum

cress, hoary *

Cardaria draba

goatgrass, jointed *

(education only)

Aegilops cylindrica

henbane, black

Hyoscyamus niger

iris, yellow flag *

Iris pseudacorus

spikeweed *

Hemizonia pungens

St. Johnswort, common *

Hypericum perforatum

thistle, Canada *

Cirsium arvense

whitetop, hairy *

Cardaria pubescens