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The
information and html on this page was gleaned directly from the
Washington State Noxious Weed Control Board. I've linked the common
names to my flower pages while the scientific name links will take
you to a resource on the internet.
Class
A Weeds: Non-native species whose distribution in Washington
is still limited. Preventing new infestations and eradicating existing
infestations are the highest priority. Eradication of all Class
A plants is required by law.
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Common
Name First
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Scientific
Name First
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Buffalobur
- Solanum rostratum
common crupina - Crupina vulgaris
cordgrass, dense flower - Spartina densiflora
cordgrass, salt meadow - Spartina patens
dyers woad - Isatis tinctoria
eggleaf spurge - Euphorbia oblongata
floating primrose-willow - Ludwigia peploides
garlic mustard - Alliaria petiolata
giant hogweed - Heracleum mantegazzianum
goatsrue - Galega officinalis
hydrilla - Hydrilla verticillata
johnsongrass - Sorghum halepense
knapweed, bighead - Centaurea macrocephala
knapweed, Vochin - Centaurea nigrescens
kudzu - Pueraria montana var. lobata
lawnweed - Soliva sessilis
meadow clary - Salvia pratensis
purple starthistle - Centaurea calcitrapa
reed sweetgrass - Glyceria maxima
sage, clary - Salvia sclarea
sage, Mediterranean
- Salvia aethiopis
silverleaf nightshade - Solanum elaeagnifolium
Spanish broom - Spartium junceum
spurge flax - Thymelaea passerina
Syrian bean-caper - Zygophyllum fabago
Texas blueweed - Helianthus ciliaris
thistle, Italian - Carduus pycnocephalus
thistle, milk - Silybum marianum
thistle, slenderflower - Carduus tenuiflorus
velvetleaf - Abutilon theophrasti
wild four o'clock - Mirabilis nyctaginea
yellow devil hawkweed - Hieracium floribundum |
Abutilon
theophrasti - velvetleaf
Alliaria petiolata - garlic mustard
Carduus pycnocephalus - thistle: Italian
Carduus tenuiflorus - slenderflower
Centaurea calcitrapa - purple starthistle
Centaurea macrocephala - knapweed: bighead
Centaurea nigrescens - Vochin
Crupina vulgaris - common crupina
Euphorbia oblongata - eggleaf spurge
Galega officinalis - goatsrue
Glyceria maxima - reed sweetgrass
Helianthus ciliaris - Texas blueweed
Heracleum mantegazzianum - giant hogweed
Hieracium floribundum - yellow devil hawkweed
Hydrilla verticillata - hydrilla
Isatis tinctoria - dyers woad
Ludwigia peploides - floating primrose-willow
Mirabilis nyctaginea - wild four o'clock
Pueraria montana var. lobata - kudzu
Salvia pratensis - meadow clary
Silybum marianum - milk thistle
Solanum rostratum - Buffalobur
Soliva sessilis - lawnweed
Sorghum halepense - johnsongrass
Spartina densiflora - cordgrass: dense flower
Spartina patens - salt meadow
Salvia sclarea - sage: clary sage
Salvia aethiopis - sage: Mediterranean
Solanum elaeagnifolium - silverleaf nightshade
Spartium junceum - Spanish broom
Thymelaea passerina - spurge flax
Zygophyllum fabago - Syrian bean-caper |
Class
B Weeds: Non-native species presently limited to portions of
the State. Species are designated for control in regions where they
are not yet widespread. Preventing new infestations in these areas
is a high priority. In regions where a Class B species is already
abundant, control is decided at the local level, with containment
as the primary goal. Please contact your County Noxious Weed Control
Coordinator to learn which species are designated in your area.
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Common
Name First
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Scientific
Name First
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Austrian
fieldcress - Rorippa austriaca
blackgrass - Alopecurus myosuroides
blueweed - Echium vulgare
Brazilian elodea - Egeria densa
bugloss, annual - Anchusa arvensis
bugloss, common - Anchusa officinalis
camelthorn - Alhagi maurorum
common catsear - Hypochaeris radicata
*common fennel - Foeniculum vulgare
cordgrass, common - Spartina anglica
cordgrass, smooth - Spartina alterniflora
Dalmatian toadflax
- Linaria dalmatica ssp. dalmatica
Eurasian watermilfoil - Myriophyllum spicatum
fanwort - Cabomba caroliniana
gorse - Ulex europaeus
grass-leaved arrowhead - Sagittaria graminea
hawkweed, oxtongue - Picris hieracioides
hawkweed, mouseear - Hieracium pilosella
hawkweed, orange - Hieracium aurantiacum
hawkweed, polar - Hieracium atratum
hawkweed, queen-devil - Hieracium glomeratum
hawkweed, smooth - Hieracium laevigatum
hawkweed, yellow - Hieracium caespitosum
hedgeparsley - Torilis arvensis
herb-Robert - Geranium robertianum
hoary alyssum - Berteroa incana
houndstongue - Cynoglossum officinale
indigobush - Amorpha fruticosa
knapweed, black - Centaurea nigra
knapweed, brown - Centaurea jacea
knapweed, diffuse
- Centaurea diffusa
knapweed, meadow - Centaurea jacea x nigra
knapweed, Russian - Acroptilon repens
knapweed, spotted - Centaurea stoebe
knotweed, Bohemian - Polygonum bohemicum
knotweed, giant - Polygonum sachalinense
knotweed, Himalayan - Polygonum polystachyum
knotweed, Japanese
- Polygonum cuspidatum
kochia -
Kochia scoparia
lepyrodiclis
- Lepyrodiclis holosteoides
longspine sandbur - Cenchrus longispinus
loosestrife, garden - Lysimachia vulgaris
loosestrife, purple - Lythrum salicaria
loosestrife, wand - Lythrum virgatum
oxeye daisy - Leucanthemum vulgare
parrotfeather - Myriophyllum aquaticum
perennial pepperweed - Lepidium latifolium
perennial sowthistle - Sonchus arvensis ssp. arvensis
policeman's helmet - Impatiens glandulifera
puncturevine - Tribulus terrestris
rush skeletonweed - Chondrilla juncea
saltcedar - Tamarix ramosissima
Scotch broom
- Cytisus scoparius
*spurge laurel -
Daphne laureola
spurge: leafy - Euphorbia esula
spurge: myrtle
- Euphorbia myrsinites
sulfur cinquefoil
- Potentilla recta
swainsonpea - Sphaerophysa salsula
tansy ragwort - Senecio jacobaea
thistle, musk - Carduus nutans
thistle, plumeless - Carduus acanthoides
thistle, Scotch
- Onopordum acanthium
water primrose - Ludwigia hexapetala
white bryony - Bryonia alba
wild carrot - Daucus carota
wild chervil - Anthriscus sylvestris
yellow floating heart - Nymphoides peltata
yellow nutsedge - Cyperus esculentus
yellow starthistle
- Centaurea solstitialis |
Acroptilon
repens - knapweed: Russian
Amorpha fruticosa - indigobush
Anthriscus sylvestris - wild chervil
Anchusa arvensis - bugloss: annual
Anchusa officinalis - common bugloss
Alhagi maurorum - camelthorn
Alopecurus myosuroides - blackgrass
Berteroa incana - hoary alyssum
Bryonia alba - white bryony
Cabomba caroliniana - fanwort
Carduus nutans - thistle: musk
Carduus acanthoides - thistle: plumeless
Cenchrus longispinus - longspine sandbur
Centaurea diffusa - knapweed: diffuse
Centaurea jacea - knapweed: brown
Centaurea jacea x nigra - knapweed: meadow
Centaurea nigra - knapweed: black
Centaurea solstitialis - yellow
starthistle
Centaurea stoebe - knapweed: spotted
Chondrilla juncea - rush skeletonweed
Cynoglossum officinale - houndstongue
Cyperus esculentus - yellow nutsedge
Cytisus scoparius - Scotch broom
*Daphne laureola - spurge laurel
Daucus carota - wild carrot
Echium vulgare - blueweed
Egeria densa - Brazilian elodea
Euphorbia esula - spurge: leafy
Euphorbia myrsinites - spurge: myrtle
*Foeniculum vulgare - common fennel
Geranium robertianum - herb-Robert
Hieracium atratum - hawkweed: polar
Hieracium aurantiacum - hawkweed: orange
Hieracium caespitosum - hawkweed: yellow
Hieracium glomeratum - hawkweed: queen-devi
Hieracium laevigatum - hawkweed: smooth
Hieracium pilosella - hawkweed: mouseearl
Hypochaeris radicata - common catsear
Impatiens glandulifera - policeman's helmet
Kochia scoparia - kochia
Lepidium latifolium - perennial pepperweed
Lepyrodiclis holosteoides - lepyrodiclis
Leucanthemum vulgare - oxeye daisy
Linaria dalmatica ssp. dalmatica - Dalmatian toadflax
Ludwigia hexapetala - water primrose
Lysimachia vulgaris - loosestrife: garden
Lythrum salicaria - loosestrife: purple
Lythrum virgatum - loosestrife: wand
Myriophyllum aquaticum - parrotfeather
Myriophyllum spicatum - Eurasian watermilfoil
Nymphoides peltata - yellow floating heart
Onopordum acanthium - thistle: Scotch
Picris hieracioides - hawkweed oxtongue
Polygonum bohemicum - knotweed: Bohemian
Polygonum cuspidatum - knotweed: Japanese
Polygonum polystachyum - knotweed: Himalayan
Polygonum sachalinense - knotweed: giant
Potentilla recta - sulfur cinquefoil
Rorippa austriaca - Austrian fieldcress
Sagittaria graminea - grass-leaved arrowhead
Senecio jacobaea - tansy ragwort
Sonchus arvensis ssp. arvensis - perennial sowthistle
Spartina alterniflora - cordgrass: smooth
Spartina anglica - cordgrass: common
Sphaerophysa salsula - swainsonpea
Tamarix ramosissima - saltcedar
Torilis arvensis - hedgeparsley
Tribulus terrestris - puncturevine
Ulex europaeus - gorse |
Class
C Weeds: Noxious weeds which are already widespread in Washington
or are of special interest to the state's agricultural industry.
The Class C status allows counties to enforce control if locally
desired. Other counties may choose to provide education or technical
consultation.
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Common
Name First
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Scientific
Name First
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absinth wormwood - Artemisia absinthium
babysbreath - Gypsophila paniculata
black henbane - Hyoscyamus niger
butterfly bush - Buddleja davidii
cereal rye
- Secale cereale
common groundsel - Senecio vulgaris
common reed
(nonnative) - Phragmites australis
common St. Johnswort
- Hypericum perforatum
common tansy - Tanacetum vulgare
curly-leaf pondweed - Potamogeton crispus
English ivy: four cultivars only - Hedera helix 'Baltica', 'Pittsburgh',
and 'Star' H. hibernica 'Hibernica'
field bindweed
- Convolvulus arvensis
fragrant water lily - Nymphaea odorata
hairy whitetop - Cardaria pubescens
hairy willow-herb - Epilobium hirsutum
hawkweeds, nonnative listed elsewhere - Hieracium spp.
hoary cress
- Cardaria draba
jointed goatgrass - Aegilops cylindrica
old man's beard - Clematis vitalba
poison-hemlock - Conium maculatum
reed canarygrass
- Phalaris arundinacea
scentless mayweed - Matricaria perforata
smoothseed alfalfa dodder - Cuscata approximata
spikeweed - Hemizonia pungens
spiny cocklebur - Xanthium spinosum
thistle, bull -
Cirsium vulgare
thistle, Canada - Cirsium arvense
white cockle - Silene
latifolia ssp. alba
*yellow archangel - Lamiastrum galeobdolon
yellow flag
iris - Iris pseudacorus
yellow toadflax
- Linaria vulgaris |
Aegilops
cylindrica - jointed goatgrass
Artemisia absinthium - absinth wormwood
Buddleja davidii - butterfly bush
Cardaria draba - hoary cress
Cardaria pubescens - hairy whitetop
Cirsium arvense - thistle: Canada
Cirsium vulgare - thistle: bull
Clematis vitalba - old man's beard
Conium maculatum - poison-hemlock
Convolvulus arvensis - field bindweed
Cuscata approximata - smoothseed alfalfa dodder
Epilobium hirsutum - hairy willow-herb
Gypsophila paniculata - babysbreath
Hedera helix 'Baltica' - English ivy
Hedera helix 'Pittsburgh' - English ivy
Hedera helix 'Star' - English ivy
Hedera hibernica 'Hibernica' - English ivy
Hemizonia pungens - spikeweed
Hieracium spp. - hawkweeds, nonnative not listed elsewhere
Hyoscyamus niger - black henbane
Hypericum perforatum - common St. Johnswort
Iris pseudacorus - yellow flag iris
*Lamiastrum galeobdolon - yellow archangel
Linaria vulgaris - yellow toadflax
Matricaria perforata - scentless mayweed
Nymphaea odorata - fragrant water lily
Phalaris arundinacea - reed canarygrass
Phragmites australis - common reed (nonnative)
Potamogeton crispus - curly-leaf pondweed
Secale cereale - cereal rye
Senecio vulgaris - common groundsel
Silene latifolia ssp. alba - white cockle
Tanacetum vulgare - common tansy
Xanthium spinosum - spiny cocklebur
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*New
addition to the 2007 Noxious Weed List
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= Poisonous to animal and/or human
= Noxious or Invasive in Washington
= Crop weed in Washington
= Federal Noxious weed in Washington
= Native to
Washington
= endangered
in Washington
= Found
on Whidbey and/or Fidalgo Islands