Washington State Noxious Weed General Distribution Maps


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Washington State Noxious Weed General Distribution Maps

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Sample Weed Map


Data for these general distribution maps was provided by county noxious weed control boards, Washington State University Cooperative Extension, state and federal agencies, tribes, and non-governmental organizations. No warranty is made by WSDA as to the accuracy, reliability, or completeness of this data for individual or aggregate use with other data.


Click on the common name below to view distribution map of weed.

Common Name Scientific Name
Absinth Wormwood Artemisia absinthium
Austrian Fieldcress Rorippa austriaca
Babysbreath Gypsophila paniculata
Blackgrass Alopecurus myosuroides
Black Henbane Hyocyamus niger
Blueweed Echium vulgare
Brazilian Elodea Egeria densa
Buffalobur Solanum rostratum
Bugloss, Annual Anchusa arvensis
Bugloss, Common Anchusa officinalis
Butterfly Bush Buddleja davidii
Camelthorn Alhagi maurorum
Cattail Nonnative Species Typha spp.
Cereal Rye Secale cereale
Common Barberry Berberis vulgaris
Common Catsear Hypochaeris radicata
Common Crupina Crupina vulgaris
Common Fennel Foeniculum vulgare
Common Groundsel Senecio vulgaris
Common Reed (nonnative only) Phragmites australis
Common St. Johnswort Hypericum perforatum
Common Tansy Tanacetum vulgare
Common Teasel Dipsacus fullonum
Cordgrass, Common Spartina anglica
Cordgrass, Dense Flower Spartina densiflora
Cordgrass, Salt Meadow Spartina patens
Cordgrass, Smooth Spartina alterniflora
Curly-Leaf Pondweed Potamogeton crispus
Dalmatian Toadflax Linaria dalmatica ssp. dalmatica
Dyers Woad Isatis tinctoria
Eggleaf Spurge Euphorbia oblongata
English Hawthorn Crataegus monogyna
English Ivy Hedera helix
Eurasian Watermilfoil Myriophyllum spicatum
Eurasian Watermilfoil Hybrid Myriophyllum spicatum x M. sibiricum
Evergreen Blackberry Rubus laciniatus
European Coltsfoot Tussilago farfara
False Brome Brachypodium sylvaticum
Fanwort Cabomba caroliniana
Field Bindweed Convolvulus arvensis
Floating Primrose-Willow Ludwigia peploides
Flowering Rush Butomus umbellatus
Fragrant Water Lily Nymphaea odorata
French Broom Genista monspessulana
Garlic Mustard Alliaria petiolata
Giant Hogweed Heracleum mantegazzianum
Goatsrue Galega officinalis
Gorse Ulex europaeus
Grass-Leaved Arrowhead Sagittaria graminea
Hairy Whitetop  Lepidium appelianum
Hairy Willow-Herb Epilobium hirsutum
Hawkweed, Orange Hieracium aurantiacum
Hawkweed, Oxtongue Picris hieracioides
Hawkweeds, Nonnative Species of the Meadow Subgenus  Hieracium, subgenus Pilosella
Hawkweeds, Nonnative Species of the Wall Subgenus  Hieracium, subgenus Hieracium
Herb-Robert Geranium robertianum
Himalayan Blackberry Rubus armeniacus
Hoary Alyssum Berteroa incana
Hoary Cress Lepidium draba
Houndstongue Cynoglossum officinale
Hydrilla Hydrilla verticillata
Indigobush Amorpha fruticosa
Italian Arum Arum italicum
Japanese Eelgrass Zostera japonica
Johnsongrass Sorghum halepense
Jointed Goatgrass Aegilops cylindrica
Jubata Grass  Cortaderia jubata
Knapweed, Bighead  Centaurea macrocephala
Knapweed, Black Centaurea nigra
Knapweed, Brown  Centaurea jacea
Knapweed, Diffuse Centaurea diffusa
Knapweed, Meadow  Centaurea x moncktonii
Knapweed, Russian Acroptilon repens
Knapweed, Spotted Centaurea stoebe
Knapweed, Vochin  Centaurea nigrescens
Knotweed, Bohemian Polygonum bohemicum
Knotweed, Combined  Polygonum spp.
Knotweed, Giant  Polygonum sachalinense
Knotweed, Himalayan  Polygonum polystachyum
Knotweed, Japanese  Polygonum cuspidatum
Kochia  Kochia scoparia
Kudzu Pueraria montana var. lobata
Lawnweed Soliva sessilis
Lesser Celandine Ficaria verna
Longspine Sandbur Cenchrus longispinus
Loosestrife, Garden  Lysimachia vulgaris
Loosestrife, Purple Lythrum salicaria
Loosestrife, Wand Lythrum virgatum
Malta Starthistle Centaurea melitensis
Meadow Clary  Salvia pratensis
Medusahead  Taeniatherum caput-medusae
Old Man's Beard Clematis vitalba
Oriental Clematis  Clematis orientalis
Oxeye Daisy Leucanthemum vulgare
Pampas Grass Cortaderia selloana
Parrotfeather Myriophyllum aquaticum
Perennial Pepperweed Lepidium latifolium
Perennial Sowthistle Sonchus arvensis
Poison-Hemlock  Conium maculatum
Policeman's Helmet Impatiens glandulifera
Puncturevine  Tribulus terrestris
Purple Starthistle Centaurea calcitrapa
Ravenna Grass  Saccharum ravennae
Reed Canarygrass Phalaris arundinacea
Reed Sweetgrass Glyceria maxima
Ricefield Bulrush  Schoenoplectus mucronatus
Rush Skeletonweed Chondrilla juncea
Russian Olive Elaeagnus angustifolia
Sage, Clary  Salvia sclarea
Sage, Mediterranean  Salvia aethiopis
Saltcedar Tamarix ramosissima
Scentless Mayweed Matricaria perforata
Scotch Broom Cytisus scoparius
Shiny Geranium Geranium lucidum
Silverleaf Nightshade Solanum elaeagnifolium
Small Flowered Jewelweed  Impatiens parviflora
Smoothseed Alfalfa Dodder Cuscuta approximata
Spanish Broom Spartium junceum
Spikeweed Centromadia pungens
Spiny Cocklebur Xanthium spinosum
Spotted Jewelweed  Impatiens capensis
Spurge Flax  Thymelaea passerina
Spurge Laurel Daphne laureola
Spurge, Leafy  Euphorbia esula
Spurge, Myrtle  Euphorbia myrsinites
Sulfur Cinquefoil Potentilla recta
Swainsonpea Sphaerophysa salfula
Syrian Bean-Caper Zygophyllum fabago
Tansy Ragwort Senecio jacobaea
Texas Blueweed Helianthus ciliaris
Thistle, Bull Cirsium vulgare
Thistle, Canada Cirsium arvense
Thistle, Italian Carduus pycnocephalus
Thistle, Milk Silybum marianum
Thistle, Musk  Carduus nutans
Thistle, Plumeless Carduus acanthoides
Thistle, Scotch Onopordum acanthium
Thistle, Slenderflower Carduus tenuiflorus
Tree-of-heaven Ailanthus altissima
Variable-leaf Milfoil Myriophyllum heterophyllum
Velvetleaf Abutilon theophrasti
Ventenata Ventenata dubia
Water Primrose  Ludwigia hexapetala
White Bryony  Bryonia alba
White Cockle Silene latifolia ssp. alba
Wild Carrot  Daucus carota
Wild Chervil Anthriscus sylvestris
Wild Four o'clock Mirabilis nyctaginea
Yellow Archangel Lamiastrum galeobdolon
Yellow Flag Iris Iris pseudacorus
Yellow Floating Heart  Nymphoides peltata
Yellow Nutsedge Cyperus esculentus
Yellow Starthistle  Centaurea solstitialis
Yellow Toadflax  Linaria vulgaris