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Introduced, Invasive, and Noxious Plants

NRCS Invasive Species Policy
Invasive Species Executive Order 13112

Washington State-listed Noxious Weeds
156 records returned

Click on an accepted name below to view its PLANTS Profile with more information, and web links if available. Noxious weeds that are synonyms retain their noxious status, and are indented beneath the current PLANTS accepted name.

Washington Administrative Code. 2005. Noxious weed control, Chapter 16-752 (24 May 2006). State of Washington.

Washington Administrative Code. 2005. State noxious weed list and schedule of monetary penalties, Chapter 16-750 (24 May 2006). State of Washington.

Symbol Scientific Name Noxious Common Name State Noxious Status Native Status*
ABTH Abutilon theophrasti Medik. velvetleaf CAW, NWSPQ L48 (I), CAN (I)
ALPE4 Alliaria petiolata (M. Bieb.) Cavara & Grande garlic mustard CAW, NWSPQ L48 (I), AK (I), CAN (I)
CAPY2 Carduus pycnocephalus L. Italian thistle CAW, NWSPQ L48 (I), HI (I)
CECA2 Centaurea calcitrapa L. purple starthistle CAW, NWSPQ L48 (I), CAN (I)
CEMA9 Centaurea macrocephala Puschk. ex Willd. bighead knapweed CAW, NWSPQ L48 (I), CAN (I)
CENI3 Centaurea nigrescens Willd. Vochin knapweed CAW, NWSPQ L48 (I), CAN (I)
GAOF Galega officinalis L. goatsrue CAW, NWSPQ L48 (I), CAN (I)
MINY Mirabilis nyctaginea (Michx.) MacMill. wild four o'clock, wild four o'clock, umbrella-wort CAW, NWSPQ L48 (N), CAN (N)
SAAE Salvia aethiopis L. Mediterranean sage CAW, NWSPQ L48 (I)
SAPR2 Salvia pratensis L. meadow clary CAW, NWSPQ L48 (I), CAN (I)
SOEL Solanum elaeagnifolium Cav. silverleaf nightshade CAW, NWSPQ L48 (N), HI (I), PR (N)
SORO Solanum rostratum Dunal buffalobur, buffaloburr CAW, NWSPQ L48 (N), CAN (W)
SPJU2 Spartium junceum L. Spanish broom CAW, NWSPQ L48 (I), HI (I)
HYVE3 Hydrilla verticillata (L. f.) Royle hydrilla CAW, WAWQ L48 (I)
SPDE2 Spartina densiflora Brongn. dense-flowered cordgrass, denseflower cordgrass CAW, WAWQ L48 (I)
SPPA Spartina patens (Aiton) Muhl. salt meadow cordgrass CAW, WAWQ L48 (N), PR (N), VI (N), CAN (N)
ACRE3 Acroptilon repens (L.) DC. Russian knapweed CBW L48 (I), CAN (I)
ALMA12 Alhagi maurorum Medik. camelthorn CBW L48 (I)
ALMY Alopecurus myosuroides Huds. blackgrass CBW L48 (I), CAN (N)
ANAR16 Anchusa arvensis (L.) M. Bieb. annual bugloss CBW L48 (I), CAN (I)
BRAL4 Bryonia alba L. white bryony CBW L48 (I)
CELO3 Cenchrus longispinus (Hack.) Fernald longspine sandbur CBW L48 (N), CAN (N)
CESO3 Centaurea solstitialis L. yellow starthistle CBW L48 (I), CAN (I)
CHJU Chondrilla juncea L. rush skeletonweed CBW L48 (I), CAN (I)
CYOF Cynoglossum officinale L. houndstongue CBW L48 (I), CAN (I)
GERO Geranium robertianum L. herb Robert CBW L48 (NI), AK (I), CAN (N), SPM (N)
HIAT2 Hieracium atratum Fr. polar hawkweed CBW
HIGL3 Hieracium glomeratum Froel. queen-devil hawkweed CBW L48 (I)
HILA4 Hieracium laevigatum Willd. smooth hawkweed CBW L48 (N)
HYRA3 Hypochaeris radicata L. common catsear CBW L48 (I), AK (I), HI (I), CAN (I), SPM (I)
LEHO7 Lepyrodiclis holosteoides (C.A. Mey.) Fenzl ex Fisch. & C.A. Mey. lepyrodiclis CBW L48 (I)
LIDAD Linaria dalmatica (L.) Mill. ssp. dalmatica Dalmatian toadflax CBW L48 (I), CAN (I)
LIGED Linaria genistifolia (L.) Mill. ssp. dalmatica (L.) Maire & Petitm. Dalmatian toadflax NWSPQ
PIHI Picris hieracioides L. hawkweed oxtongue CBW L48 (NI), AK (N), HI (I), CAN (I)
PORE5 Potentilla recta L. sulfur cinquefoil CBW L48 (I), CAN (I)
ROAU Rorippa austriaca (Crantz) Besser Austrian fieldcress CBW L48 (I), CAN (I)
SOARA2 Sonchus arvensis L. ssp. arvensis perennial sowthistle CBW L48 (I), CAN (I), SPM (I)
SPSA3 Sphaerophysa salsula (Pall.) DC. swainsonpea CBW L48 (I), CAN (I)
TRTE Tribulus terrestris L. puncturevine CBW L48 (I), HI (I), CAN (W)
ANOF Anchusa officinalis L. common bugloss, common bugloss, alkanet, anchusa CBW, NWSPQ L48 (I), CAN (I)
CANU4 Carduus nutans L. musk thistle, musk thistle, nodding thistle CBW, NWSPQ L48 (I), CAN (I)
CEJA Centaurea jacea L. brown knapweed, brown knapweed, rayed knapweed, brown centaury, horse-knobs, hardheads CBW, NWSPQ L48 (I), CAN (I), GL (I)
CYSC4 Cytisus scoparius (L.) Link Scotch broom CBW, NWSPQ L48 (I), AK (I), HI (I), CAN (I)
ECVU Echium vulgare L. blueweed, blueweed, blue thistle, blue devil, viper's bugloss, snake flower CBW, NWSPQ L48 (I), AK (I), CAN (W), SPM (I)
EUES Euphorbia esula L. leafy spurge CBW, NWSPQ L48 (I), CAN (I)
HIAU Hieracium aurantiacum L. orange hawkweed, orange hawkweed, orange paintbrush, red daisy flameweed, devil's weed, grim-the-collier CBW, NWSPQ L48 (I), AK (I), CAN (I), SPM (I)
HIPI Hieracium pilosella L. mouseear hawkweed CBW, NWSPQ L48 (I), AK (I), CAN (I), SPM (I)
IMGL Impatiens glandulifera Royle policeman's helmet CBW, NWSPQ L48 (I), CAN (I)
LELA2 Lepidium latifolium L. perennial pepperweed CBW, NWSPQ L48 (I), CAN (I)
ONAC Onopordum acanthium L. Scotch thistle CBW, NWSPQ L48 (I), CAN (W)
POBO10 Polygonum ×bohemicum (J. Chrtek & Chrtková) Zika & Jacobson [cuspidatum × sachalinense] Bohemian knotweed CBW, NWSPQ CAN (I)
POPO5 Polygonum polystachyum Wall. ex Meisn. Himalayan knotweed CBW, NWSPQ L48 (I), CAN (I), SPM (I)
POSA4 Polygonum sachalinense F. Schmidt ex Maxim. giant knotweed CBW, NWSPQ L48 (I), AK (I), CAN (I)
TARA Tamarix ramosissima Ledeb. saltcedar CBW, NWSPQ L48 (I)
TOAR Torilis arvensis (Huds.) Link hedgeparsley CBW, NWSPQ L48 (I), CAN (N)
ULEU Ulex europaeus L. gorse, gorse, furze CBW, NWSPQ L48 (I), HI (I), CAN (I)
CYES Cyperus esculentus L. yellow nutsedge CBW, Q L48 (NI), HI (I), PR (I), VI (I), CAN (I)
LYVI3 Lythrum virgatum L.1 purple loosestrife, wand loosestrife CBW, Q L48 (I)
CACA Cabomba caroliniana A. Gray fanwort CBW, WAWQ L48 (N), CAN (N)
EGDE Egeria densa Planch. Brazilian elodea CBW, WAWQ L48 (I), HI (I), PR (I), CAN (W)
MYSP2 Myriophyllum spicatum L. Eurasian watermilfoil CBW, WAWQ L48 (I), AK (I), CAN (I)
NYPE Nymphoides peltata (S.G. Gmel.) Kuntze yellow floating heart CBW, WAWQ L48 (I), CAN (I)
SAGR Sagittaria graminea Michx. grass-leaved arrowhead CBW, WAWQ L48 (N), CAN (N)
SPAL Spartina alterniflora Loisel. smooth cordgrass CBW, WAWQ L48 (N), CAN (N)
AECY Aegilops cylindrica Host jointed goatgrass CCW L48 (I)
ARAB3 Artemisia absinthium L. absinth wormwood CCW L48 (I), CAN (I)
BUDA2 Buddleja davidii Franch. butterfly bush CCW L48 (I), HI (I), PR (I), CAN (I)
CADR Cardaria draba (L.) Desv. hoary cress CCW L48 (I), CAN (I)
CAPU6 Cardaria pubescens (C.A. Mey.) Jarmolenko hairy whitetop CCW L48 (I), CAN (I)
CEPUP6 Centromadia pungens (Hook. & Arn.) Greene ssp. pungens L48 (N)
HEPU5 Hemizonia pungens (Hook. & Arn.) Torr. & A. Gray spikeweed CCW
CIAR4 Cirsium arvense (L.) Scop. Canada thistle CCW L48 (I), AK (I), CAN (I), GL (I), SPM (I)
CIVU Cirsium vulgare (Savi) Ten. bull thistle CCW L48 (I), AK (I), HI (I), CAN (I), SPM (I)
CLVI6 Clematis vitalba L. old man's beard CCW L48 (I), CAN (I)
COMA2 Conium maculatum L. poison hemlock CCW L48 (I), CAN (I)
COAR4 Convolvulus arvensis L. field bindweed CCW L48 (I), HI (I), CAN (I)
CUAP2 Cuscuta approximata Bab. smoothseed alfalfa dodder CCW L48 (I), CAN (I)
GYPA Gypsophila paniculata L. babysbreath CCW L48 (I), CAN (I)
HEHE Hedera helix L.2 English ivy CCW L48 (I), HI (I), CAN (I)
HEHI12 Hedera hibernica (G. Kirchn.) Bean3 English ivy CCW L48 (I)
HIERA Hieracium L.4 hawkweed CCW
HYNI Hyoscyamus niger L. black henbane CCW L48 (I), CAN (I)
HYPE Hypericum perforatum L. common St. Johnswort CCW L48 (I), HI (I), CAN (I), SPM (I)
IRPS Iris pseudacorus L. iris, yellow flag iris CCW L48 (I), CAN (I)
LIVU2 Linaria vulgaris Mill. yellow toadflax CCW L48 (I), AK (I), CAN (I), GL (I), SPM (I)
NYOD Nymphaea odorata Aiton fragrant water lily CCW L48 (N), AK (I), PR (N), CAN (N)
PHAR3 Phalaris arundinacea L. reed canarygrass CCW L48 (N), AK (I), CAN (N), SPM (I)
PHAU7 Phragmites australis (Cav.) Trin. ex Steud.5 common reed CCW L48 (N), HI (I), PR (N), CAN (N)
POCR3 Potamogeton crispus L. crisped pondweed, curly pondweed CCW L48 (I), CAN (I)
SECE Secale cereale L. cereal rye CCW L48 (I), AK (I), CAN (W), GL (W)
SEVU Senecio vulgaris L. common groundsel CCW L48 (I), AK (I), HI (I), CAN (I), GL (I), SPM (I)
SILAA3 Silene latifolia Poir. ssp. alba (Mill.) Greuter & Burdet white cockle CCW L48 (I), AK (I)
TAVU Tanacetum vulgare L. common tansy CCW L48 (I), AK (I), HI (I), CAN (I), SPM (I)
TRPE21 Tripleurospermum perforatum (Mérat) M. Lainz L48 (I), AK (I), CAN (I), GL (I)
MAPE2 Matricaria perforata Mérat scentless mayweed CCW
XASP2 Xanthium spinosum L. spiny cocklebur CCW L48 (I), CAN (I)
BASC5 Bassia scoparia (L.) A.J. Scott L48 (I), CAN (I)
KOSC Kochia scoparia (L.) Schrad. kochia, summer-cyprus, burning-bush, fireball, Mexican fireweed NWSPQ
CESTM Centaurea stoebe L. ssp. micranthos (Gugler) Hayek L48 (I), HI (I), CAN (I)
CEBI2 Centaurea biebersteinii DC. spotted knapweed NWSPQ
CHMI Chaenorhinum minus (L.) Lange dwarf snapdragon NWSPQ L48 (I), CAN (I)
HITR Hibiscus trionum L. Venice mallow, flower-of-an-hour, bladder ketmia, modesty, shoo-fly NWSPQ L48 (I), CAN (I)
PRLO Proboscidea louisianica (Mill.) Thell. unicorn-plant NWSPQ L48 (N), CAN (I)
CATE2 Carduus tenuiflorus W. Curtis slenderflower thistle NWSPQ, CAW L48 (I)
CRVU2 Crupina vulgaris Cass. common crupina NWSPQ, CAW L48 (I)
EUOB4 Euphorbia oblongata Griseb. eggleaf spurge NWSPQ, CAW L48 (I)
HECI Helianthus ciliaris DC. Texas blueweed NWSPQ, CAW L48 (N)
HEMA17 Heracleum mantegazzianum Sommier & Levier giant hogweed, giant hogweed, giant cow parsnip NWSPQ, CAW L48 (I), CAN (I)
HIFL3 Hieracium ×floribundum Wimm. & Grab. (pro sp.) [caespitosum × lactucella] yellow devil hawkweed NWSPQ, CAW L48 (I), CAN (I), SPM (I)
ISTI Isatis tinctoria L. dyers woad, dyers' woad NWSPQ, CAW L48 (I), CAN (W)
PUMOL Pueraria montana (Lour.) Merr. var. lobata (Willd.) Maesen & S. Almeida kudzu NWSPQ, CAW L48 (I), HI (I)
SASC2 Salvia sclarea L. clary sage NWSPQ, CAW L48 (I), CAN (W)
SIMA3 Silybum marianum (L.) Gaertn. milk thistle NWSPQ, CAW L48 (I), CAN (I)
SOSE2 Soliva sessilis Ruiz & Pav. lawnweed NWSPQ, CAW L48 (I), HI (I), CAN (I)
SOHA Sorghum halepense (L.) Pers. johnsongrass NWSPQ, CAW L48 (I), HI (I), PR (I), CAN (I)
THPA7 Thymelaea passerina (L.) Coss. & Germ. spurge flax NWSPQ, CAW L48 (I), CAN (N)
ZYFA Zygophyllum fabago L. Syrian bean-caper, Syrian beancaper NWSPQ, CAW L48 (I)
AMFR Amorpha fruticosa L. indigobush, indigobush, lead plant NWSPQ, CBW L48 (N), CAN (N)
ANSY Anthriscus sylvestris (L.) Hoffm. wild chervil NWSPQ, CBW L48 (I), CAN (I), GL (I)
CAAC Carduus acanthoides L. plumeless thistle NWSPQ, CBW L48 (I), CAN (I)
CEDI3 Centaurea diffusa Lam. diffuse knapweed NWSPQ, CBW L48 (I), CAN (I)
CENI2 Centaurea nigra L. black knapweed NWSPQ, CBW L48 (I), CAN (I), SPM (I)
DACA6 Daucus carota L. wild carrot, wild carrot, Queen Anne's lace NWSPQ, CBW L48 (I), PR (I), CAN (I), SPM (I)
HICA10 Hieracium caespitosum Dumort. yellow hawkweed, yellow hawkweed, yellow paintbrush, devil's paintbrush, yellow devil, field hawkweed, king devil NWSPQ, CBW L48 (I), CAN (I)
LEVU Leucanthemum vulgare Lam. ox-eye daisy, oxeye daisy, white daisy, whiteweed, field daisy, marguerite, poorland flower NWSPQ, CBW L48 (I), AK (I), HI (I), CAN (I), SPM (I)
POCU6 Polygonum cuspidatum Siebold & Zucc. Japanese knotweed NWSPQ, CBW L48 (I), AK (I), CAN (I), SPM (I)
SEJA Senecio jacobaea L.6 tansy ragwort NWSPQ, CBW, Q L48 (I), CAN (I), SPM (I)
CYRO Cyperus rotundus L. purple nutsedge Q L48 (I), HI (I), PR (I), VI (I)
LYSA2 Lythrum salicaria L.1 purple loosestrife Q, CBW L48 (I), CAN (I), SPM (I)
BUUM Butomus umbellatus L. flowering rush WAWQ L48 (I), CAN (I)
CRHE5 Crassula helmsii A. Berger Australian swamp stonecrop WAWQ
EPHI Epilobium hirsutum L. hairy willow herb WAWQ L48 (I), CAN (I)
GLCL3 Glossostigma cleistanthum W.R. Barker mud mat WAWQ L48 (I)
GLDI Glossostigma diandrum (L.) Kunze [excluded] mud mat WAWQ
HYMO6 Hydrocharis morsus-ranae L. European frog-bit WAWQ L48 (I), CAN (I)
LAMA15 Lagarosiphon major (Ridley) Moss African elodea WAWQ
LUGRH Ludwigia grandiflora (Michx.) Greuter & Burdet ssp. hexapetala (Hook. & Arn.) G.L. Nesom & Kartesz L48 (I)
LUHE5 Ludwigia hexapetala (Hook. & Arn.) Zardini, Gu & P.H. Raven water primrose WAWQ
MUKE Murdannia keisak (Hassk.) Hand.-Maz. marsh dew flower, Asian spiderwort WAWQ L48 (I)
NAMI Najas minor All. slender-leaved naiad, brittle naiad WAWQ L48 (I), CAN (I)
TRBI5 Trapa bicornis Osbeck water caltrap, devil's pod, bat nut WAWQ
TRNA Trapa natans L. water chestnut, bull nut WAWQ L48 (I), CAN (I)
UTIN Utricularia inflata Walter swollen bladderwort WAWQ L48 (N)
LYVU Lysimachia vulgaris L. garden loosestrife WAWQ, CBW L48 (I), CAN (I)
MYAQ2 Myriophyllum aquaticum (Vell.) Verdc. parrotfeather WAWQ, CBW L48 (I), HI (I), CAN (I)
SPAN5 Spartina anglica C.E. Hubbard common cordgrass WAWQ, CBW L48 (I), CAN (I)

 

†CodeNoxious Status
CAW Class A noxious weed
CBW Class B noxious weed
CCW Class C noxious weed
NWSPQ Noxious weed seed and plant quarantine
Q Quarantine
WAWQ Wetland and aquatic weed quarantine

*CodeNative Status
I Introduced
N Native
W Waif

*CodeNative Status Jursdiction
L48 Lower 48 States
AK Alaska
HI Hawaii
PR Puerto Rico
VI Virgin Islands
CAN Canada
GL Greenland
SPM St. Pierre and Miquelon

1 any hybrid cross  
2 only cultivars 'Baltica', 'Pittsburgh', 'Star'  
3 only cultivar 'Hibernica'  
4 non-native Hieracium species except those listed as Class A or Class B  
5 non-native genotypes  
6 in hay  

Additional information about noxious plants in this state can be found at:

 

 
Time Generated: 09/02/2014 08:16 AM MDT