Class A Weeds: Non-native species whose Washington distribution ■South American spongeplant Limnobium laevigatum ►knotweed, Japanese Polygonum cuspidatum common St. Johnswort Hypericum perforatum Spanish broom Spartium junceum is still limited. Prevention and eradication are the highest priorities. ►kochia Bassia scoparia ►common tansy Tanacetum vulgare Syrian beancaper Zygophyllum fabago Eradication of all Class A plants is required by law. ■►lesser celandine Ficaria verna ►common teasel Dipsacus fullonum Texas blueweed Helianthus ciliaris ►loosestrife, garden Lysimachia vulgaris curlyleaf pondweed Potamogeton crispus Class B Weeds: Non-native species presently limited to portions of thistle, Italian Carduus pycnocephalus ►loosestrife, purple Lythrum salicaria English hawthorn Crataegus monogyna the State. Species are designated for control in regions where they thistle, milk Silybum marianum ►loosestrife, wand Lythrum virgatum are not yet widespread. Preventing new infestations in these areas thistle, slenderflower Carduus tenuiflorus ►English and Irish ivy - four Hedera helix 'Baltica’, ►Malta starthistle Centaurea melitensis cultivars only 'Pittsburgh', & 'Star'; H. hibernica is a high priority. In regions where a Class B species is abundant, variable-leaf milfoil Myriophyllum heterophyllum 'Hibernica' control is decided locally and containment is the primary goal. wild four-o'clock Mirabilis nyctaginea ►parrotfeather Myriophyllum aquaticum Eurasian watermilfoil hybrid Myriophyllum spicatum x M. ►perennial pepperweed Lepidium latifolium Class C Weeds: Noxious weeds that are typically widespread in Class B Noxious Weeds sibiricum ►poison hemlock Conium maculatum WA or of special interest to state agriculture. The Class C status ►blueweed Echium vulgare evergreen blackberry Rubus laciniatus ►policeman’s helmet Impatiens glandulifera allows counties to enforce control locally if desired. Other counties ►Brazilian elodea Egeria densa field bindweed Convolvulus arvensis ►puncturevine Tribulus terrestris may instead choose to provide education or technical consultation. ►bugloss, annual Anchusa arvensis fragrant waterlily Nymphaea odorata ►bugloss, common Anchusa officinalis Ravenna grass Saccharum ravennae ■ Newly listed or change in designation hairy whitetop Lepidium appelianum ►butterflybush Buddleja davidii ►rush skeletonweed Chondrilla juncea Yellow significant in San Juan County Himalayan blackberry Rubus armeniacus ►camelthorn Alhagi maurorum ►saltcedar Tamarix ramosissima ► Control or containment required ►hoary cress Lepidium draba ►common fennel (except Foeniculum vulgare (except F. ►Scotch broom Cytisus scoparius Class A Noxious Weeds bulbing fennel) vulgare var. azoricum) ►Italian arum Arum italicum ►shiny geranium Geranium lucidum Eradication Required ►common reed (non-native Phragmites australis Japanese eelgrass Zostera japonica ►spurge flax Thymelaea passerina common crupina Crupina vulgaris genotypes only) jointed goatgrass Aegilops cylindrica ►spurge laurel Daphne laureola ►Dalmatian toadflax Linaria dalmatica ssp. dalmatica cordgrass, common Spartina anglica jubata grass Cortaderia jubata ►spurge, leafy Euphorbia virgata cordgrass, dense-flowered Spartina densiflora ►Eurasian watermilfoil Myriophyllum spicatum spurge, myrtle Euphorbia myrsinites Lawnweed Soliva sessilis ►European coltsfoot Tussilago farfara cordgrass, saltmeadow Spartina patens longspine sandbur Cenchrus longispinus ►sulfur cinquefoil Potentilla recta cordgrass, smooth Spartina alterniflora ►fanwort Cabomba caroliniana ►gorse Ulex europaeus ►tansy ragwort Jacobaea vulgaris Medusahead Taeniatherum caput-medusae dyer’s woad Isatis tinctoria ►grass-leaved arrowhead Sagittaria graminea ►thistle, musk Carduus nutans nonnative cattail species eggleaf spurge Euphorbia oblongata and hybrids Typha spp. ►hairy willowherb Epilobium hirsutum ►thistle, plumeless Carduus acanthoides false brome Brachypodium sylvaticum ►old man's beard Clematis vitalba ►hawkweed, oxtongue Picris hieracioides ►thistle, Scotch Onopordum acanthium floating primrose-willow Ludwigia peploides ► oxeye daisy Leucanthemum vulgare hawkweed, orange Hieracium aurantiacum ►velvetleaf Abutilon theophrasti flowering rush Butomus umbellatus ►hawkweeds, meadow Hieracium, subgenus Pilosella pampas grass Cortaderia selloana ►water primrose Ludwigia hexapetala French broom Genista monspessulana subgenus: all nonnative ►perennial sowthistle Sonchus arvensis ssp.arvensis ►white bryony Bryonia alba garlic mustard Alliaria petiolata species and hybrids ►wild chervil Anthriscus sylvestris reed canarygrass Phalaris arundinacea giant hogweed Heracleum mantegazzianum ►hawkweeds, wall Hieracium, subgenus Hieracium Russian olive Elaeagnus angustifolia goatsrue Galega officinalis sub-genus: all nonnative ►yellow archangel Lamiastrum galeobdolon scentless mayweed Matricaria perforata species and hybrids ► hydrilla Hydrilla verticillata yellow floatingheart Nymphoides peltata herb-Robert Geranium robertianum smoothseed alfalfa dodder Cuscuta approximata Johnsongrass Sorghum halepense ►yellow nutsedge Cyperus esculentus ►hoary alyssum Berteroa incana spikeweed Centromadia pungens knapweed, bighead Centaurea macrocephala ►yellow starthistle Centaurea solstitialis ►houndstongue Cynoglossum officinale spiny cocklebur Xanthium spinosum knapweed, Vochin Centaurea nigrescens Class C Noxious Weeds ►indigobush Amorpha fruticosa spotted jewelweed Impatiens capensis kudzu Pueraria montana var. lobata ►knapweed, black Centaurea nigra absinth wormwood Artemisia absinthium Swainsonpea Sphaerophysa salsula meadow clary Salvia pratensis ►knapweed, brown Centaurea jacea Austrian fieldcress Rorippa austriaca thistle, bull Cirsium vulgare oriental clematis Clematis orientalis ►knapweed, diffuse Centaurea diffusa babysbreath Gypsophila paniculata thistle, Canada Cirsium arvense purple starthistle Centaurea calcitrapa ►knapweed, meadow Centaurea x moncktonii black henbane Hyoscyamus niger reed sweetgrass Glyceria maxima ►knapweed, Russian Rhaponticum repens blackgrass Alopecurus myosuroides tree-of-heaven Ailanthus altissima ricefield bulrush Schoenoplectus mucronatus ►knapweed, spotted Centaurea stoebe ►buffalobur Solanum rostratum Ventenata Ventenata dubia sage, clary Salvia sclarea ■►knotweed, Bohemian Polygonum x bohemicum cereal rye Secale cereale white cockle Silene latifolia ssp. alba sage, Mediterranean Salvia aethiopis ►knotweed, giant Polygonum sachalinense common barberry Berberis vulgaris wild carrot Daucus carota ►knotweed, Himalayan Persicaria wallichii silverleaf nightshade Solanum elaeagnifolium common catsear Hypochaeris radicata ►yellow flag iris Iris pseudacorus small-flowered jewelweed Impatiens parviflora common groundsel Senecio vulgaris yellow toadflax Linaria vulgaris Unregulated Plants of Concern If you would like weed identification, Noxious Weeds are non-native plants in San Juan County: site-specific control recommendations, introduced to Washington State that can be Bur Chervil or additional noxious weed information highly destructive, competitive, and difficult to Anthriscus caucalis please contact the San Juan County 2020 control. These plants invade our croplands, Caper Spurge Euphorbia lathyris Noxious Weed Control Program: rangeland, forests, parks, rivers, lakes, wetlands Cotoneasters Washington State and estuaries, causing both ecological and Cotoneaster spp. economic damage that affects us all. Dog Fennel Anthemis cotula & San Juan County Noxious weeds are capable of: English Holly Ilex aquifolium English Laurel Prunus laurocerasus Noxious Weed List  Reducing crop yields Garden Helleborine Epipactis helleborine  Reducing forage quality Non-native Lupines Lupinus spp.  Displacing native plant communities Non-native Peavines Lathryus latifolius  Destroying wildlife habitat San Juan County Noxious  Reducing recreational opportunities Lathryus sylvestris Weed Control Program Periwinkle Vinca major (e.g., fishing, hunting, swimming (360) 376-3499 and hiking) Vinca minor 62 Henry Road #26  Clogging waterways Eastsound, WA 98245 Please help protect Washington’s  Decreasing land values economy and environment from [email protected] [email protected]  Increasing erosion and wildfire risk noxious weeds! http://extension.wsu.edu/sanjuan/noxious/  Inflicting toxic reactions in humans, To help protect the State’s resources and livestock, and pets economy, the Washington State Noxious Weed Control Board adopts a State Noxious Or Weed List each year (WAC 16-750). This list

classifies weeds into three major classes (A, B, and C) based on the stage of invasion of each species and the seriousness of the threat they pose to Washington State. P.O. Box 42560 Olympia, WA 98504-2560 This classification system is designed to: (360) 725 - 5764  Prevent small infestations from expanding [email protected] http://www.nwcb.wa.gov Photo: Shawn Beach by eradicating them when they are first detected, Scotch Thistle

 Restrict already established populations (Onopordum acanthium)

of noxious weeds to regions of the state

where they already occur, and prevent Class B Noxious Weed Control Required their movement to un-infested areas, WA State Department of Agriculture  Allow flexibility of weed control at the Common Fennel 21 North First Avenue #103 local level for weeds that are already Yakima, WA 98902 (Foeniculum vulgare) List arranged alphabetically widespread. (509) 249 - 6973 Class B Noxious Weed by COMMON NAME Control Required

Photo: Rich Lee (SJC NWCB, retired)