Class A Weeds: Non-native species whose meadow clary Salvia pratensis herb-Robert Geranium robertianum yellow floating heart Nymphoides peltata distribution in Washington is still limited. purple starthistle Centaurea calcitrapa hoary alyssum Berteroa incana yellow nutsedge Cyperus esculentus Preventing new infestations and eradicating reed sweetgrass Glyceria maxima houndstongue Cynoglossum officinale yellow starthistle Centaurea solstitialis existing infestations are the highest priority. ricefield bulrush Schoenoplectus mucronatus indigobush Amorpha fruticosa
Eradication of all Class A plants is required by law. sage, clary Salvia sclarea knapweed, black Centaurea nigra Class C Weeds sage, Mediterranean Salvia aethiopis knapweed, brown Centaurea jacea absinth wormwood Artemisia absinthium Class B Weeds: Non-native species presently } shiny geranium Geranium lucidum knapweed, diffuse Centaurea diffusa babysbreath Gypsophila paniculata limited to portions of the State. Species are designated silverleaf nightshade Solanum elaeagnifolium knapweed, meadow Centaurea jacea x nigra black henbane Hyoscyamus niger for control in regions where they are not yet Spanish broom Spartium junceum knapweed, Russian Acroptilon repens cereal rye Secale cereale widespread. Preventing new infestations in these areas spurge flax Thymelaea passerina knapweed, spotted Centaurea stoebe common groundsel Senecio vulgaris is a high priority. In regions where a Class B species is Syrian bean-caper Zygophyllum fabago knotweed, Bohemian Polygonum bohemicum common St. Johnswort Hypericum perforatum already abundant, control is decided at the local level, common tansy Tanacetum vulgare with containment as the primary goal. Please contact Texas blueweed Helianthus ciliaris knotweed, giant Polygonum sachalinense curly-leaf pondweed Potamogeton crispus your County Noxious Weed Control Coordinator to thistle, Italian Carduus pycnocephalus knotweed, Himalayan Polygonum polystachyum English ivy - four Hedera helix 'Baltica’, learn which species are designated in your area. thistle, milk Silybum marianum knotweed, Japanese Polygonum cuspidatum thistle, slenderflower Carduus tenuiflorus kochia Kochia scoparia cultivars only 'Pittsburgh', and 'Star'; H. hibernica 'Hibernica' Class C Weeds: Noxious weeds which are already variable-leaf milfoil Myriophyllum heterophyllum lawnweed Soliva sessilis velvetleaf Abutilon theophrasti lepyrodiclis Lepyrodiclis holosteoides } evergreen blackberry Rubus laciniatus widespread in WA or are of special interest to the field bindweed Convolvulus arvensis state’s agricultural industry. The Class C status allows wild four o'clock Mirabilis nyctaginea longspine sandbur Cenchrus longispinus fragrant water lily Nymphaea odorata counties to enforce control if locally desired. Other loosestrife, garden Lysimachia vulgaris
hairy whitetop Cardaria pubescens counties may choose to provide education or technical Class B Weeds loosestrife, purple Lythrum salicaria consultation. Austrian fieldcress Rorippa austriaca loosestrife, wand Lythrum virgatum hairy willow-herb Epilobium hirsutum blackgrass Alopecurus myosuroides oxeye daisy Leucanthemum vulgare hawkweed, common Hieracium lachenalii Class A Weeds blueweed Echium vulgare parrotfeather Myriophyllum aquaticum hawkweeds, nonnative Hieracium spp. Eradication is required Brazilian elodea Egeria densa perennial pepperweed Lepidium latifolium and invasive species not listed elsewhere buffalobur Solanum rostratum bugloss, annual Anchusa arvensis perennial sowthistle Sonchus arvensis ssp. } Himalayan blackberry Rubus armeniacus common crupina Crupina vulgaris bugloss, common Anchusa officinalis arvensis hoary cress Cardaria draba cordgrass, common Spartina anglica butterfly bush Buddleja davidii policeman’s helmet Impatiens glandulifera jointed goatgrass Aegilops cylindrica cordgrass, dense flower Spartina densiflora camelthorn Alhagi maurorum poison-hemlock Conium maculatum old man's beard Clematis vitalba cordgrass, salt meadow Spartina patens common catsear Hypochaeris radicata puncturevine Tribulus terrestris reed canarygrass Phalaris arundinacea cordgrass, smooth Spartina alterniflora common fennel Foeniculum vulgare rush skeletonweed Chondrilla juncea scentless mayweed Matricaria perforata dyers woad Isatis tinctoria common reed Phragmites australis saltcedar Tamarix ramosissima smoothseed alfalfa Cuscuta approximata eggleaf spurge Euphorbia oblongata (nonnative genotypes) Scotch broom Cytisus scoparius dodder } false brome Brachypodium sylvaticum Dalmatian toadflax Linaria dalmatica ssp. spurge laurel Daphne laureola spikeweed Hemizonia pungens floating primrose-willow Ludwigia peploides dalmatica spurge, leafy Euphorbia esula spiny cocklebur Xanthium spinosum } flowering rush Butomus umbellatus Eurasian watermilfoil Myriophyllum spicatum spurge, myrtle Euphorbia myrsinites thistle, bull Cirsium vulgare garlic mustard Alliaria petiolata fanwort Cabomba caroliniana sulfur cinquefoil Potentilla recta thistle, Canada Cirsium arvense giant hogweed Heracleum mantegazzianum gorse Ulex europaeus swainsonpea Sphaerophysa salsula white cockle Silene latifolia ssp. alba goatsrue Galega officinalis grass-leaved arrowhead Sagittaria graminea tansy ragwort Senecio jacobaea yellow archangel Lamiastrum galeobdolon hawkweed, European Hieracium sabaudum hawkweed oxtongue Picris hieracioides thistle, musk Carduus nutans yellow flag iris Iris pseudacorus hawkweed, yellow devil Hieracium floribundum hawkweed, mouseear Hieracium pilosella thistle, plumeless Carduus acanthoides hawkweed, orange Hieracium aurantiacum thistle, Scotch Onopordum acanthium yellow toadflax Linaria vulgaris hydrilla Hydrilla verticillata hawkweed, polar Hieracium atratum water primrose Ludwigia hexapetala johnsongrass Sorghum halepense } New additions to the 2009 Noxious Weed List knapweed, bighead Centaurea macrocephala hawkweed, queen-devil Hieracium glomeratum white bryony Bryonia alba knapweed, Vochin Centaurea nigrescens hawkweed, smooth Hieracium laevigatum wild carrot Daucus carota Change in Noxious Weed Class kudzu Pueraria montana var. lobata hawkweed, yellow Hieracium caespitosum wild chervil Anthriscus sylvestris
* New additions to the 2008 Noxious Weed List
Noxious Weeds are non-native plants To help protect the State’s resources and To learn more about noxious weeds and introduced to Washington State that can economy, the Washington State Noxious noxious weed control in Washington 2009 be highly destructive, competitive, and Weed Control Board adopts a State State, please contact: difficult to control. These plants invade our Noxious Weed List each year (WAC 16- Washington State croplands, rangeland, forests, parks, 750). This list classifies weeds into three Noxious Weed List rivers, lakes, wetlands, and estuaries major classes – A, B, and C – based on causing both ecological and economical the stage of invasion of each species and WA State Noxious Weed Control Board damage that affects us all. Noxious the seriousness of the threat they pose to P.O. Box 42560 Olympia, WA 98504-2560 weeds can: Washington State. This classification (360)-725-5764 Lower crop yields system is designed to: Email: [email protected] Reduce forage quality Prevent small infestations from Website: http://www.nwcb.wa.gov expanding by eradicating them Destroy plant and animal habitat when they are first detected Or Displace native plants
WA State Department of Agriculture Reduce recreational opportunities Restrict already established weed 21 North First Avenue #103 (e.g., fishing, hunting, swimming Yakima, WA 98902 populations to regions of the state and hiking) (509) 225-2604 where they occur and prevent their Clog waterways Or movement to un-infested areas
Decrease land values Your local County Noxious Weed Control Board Allow flexibility of weed control at Increase erosion and wildfire risk the local level for weeds that are
already widespread. Shiny geranium, Geranium lucidum, And some are toxic to humans and a new Class A noxious weed livestock
Figure from Deutschlands Flora in
Abbildungen at http://www.biolib by Please help protect Washington’s Johann Georg Sturm in 1796. economy and environment Image taken from Wikimedia Commons from noxious weeds!
* New additions to the 2008 Noxious Weed List