*This is a work in progress. Please check back for more information.
| Common Name | Scientific Name | External Links for More Information | WSNWCB Ranking | OSWB Ranking | CWMA Ranking |
| Velvetleaf | Abutilon theophrasti | CABI, King County, WSNWCB | B | B | B |
| Biddy-biddy | Acaena novae-zelandiae | not listed | B | W | |
| Russian knapweed | Acroptilon repens | CABI, King County, WSNWCB | B | B | B |
| Jointed goatgrass | Aegilops cylindrica | CABI, WSNWCB | C | B | C |
| Ovate goatgrass | Aegilops geniculata | not listed | A | W | |
| Barbed goatgrass | Aegilops triuncialis | ISSG | not listed | A | W |
| Tree of heaven | Ailanthus altissima | WSNWCB | C | B | C |
| Camelthorn | Alhagi pseudalhagi | CABI, WSNWCB | B | A | A |
| Garlic mustard | Alliaria petiolata | CABI, ISSG, King County, WSNWCB | A | B | A |
| Blackgrass | Alopecurus myosuroides | CABI | C | not listed | W |
| Yellow tuft | Alyssum corsicum | not listed | A | W | |
| Yellow tuft | Alyssum murale | not listed | A | W | |
| Ragweed | Ambrosia artemisiifolia | CABI, ISSG | not listed | B | B |
| False indigo bush | Amorpha fruticosa | EDDMaps | B | B | B |
| Annual bugloss | Anchusa arvensis | King County, WSNWCB, | B | not listed | B |
| Common bugloss | Anchusa officinalis | King County, WSNWCB | B | B | B |
| Wild chervil | Anthriscus sylvestris | KingCounty, WSNWCB | B | not listed | B |
| Common burdock | Arctium minus | E-Flora BC | not listed | not listed | C |
| Tall oatgrass | Arrhenatherum elatius | C | |||
| Absinth wormwood | Artemisia absinthium | E-Flora BC, King County, WSNWCB | C | not listed | C |
| South African capeweed | Arctotheca calendula | CABI, Cal-IPC | not listed | W | W |
| Italian arum | Arum italicum | BugwoodWiki, WSNWCB | C | not listed | B |
| Giant reed | Arundo donax | BugwoodWiki, CABI, Cal-IPC, ISSG | not listed | W | A |
| Common barberry | Berberis vulgaris | E-Flora BC, WSNWCB | C | not listed | W |
| Hoary alyssum | Berteroa incana | B | W | B | |
| False brome | Brachypodium sylvaticum | CABI, E-Flora BC, King County, WSNWCB | A | B | A |
| White bryonia | Bryonia alba | BugwoodWiki, WCNAWUS | B | A | A |
| Butterfly bush | Buddleja davidii | CABI, King County, WSNWCB | B | B | B |
| Flowering rush | Butomus umbellatus | King County, MSU, NRCS | A | A | A |
| Fanwort | Cabomba caroliniana | CABI, King County, NAS, WiDNR | B | not listed | W |
| Plumeless thistle | Carduus acanthoides | CABI, IlDNR, UCDavis, WSNWCB | B | A | A |
| Musk thistle | Carduus nutans | NISIC, USFS, WSNWCB | B | B | B |
| Italian thistle | Carduus pycnocephalus | BugwoodWiki, CABI, IlDNR | A | B | A |
| Slender-flowered thistle | Carduus tenuiflorus | BugwoodWiki, IlDNR, King County | A | B | A |
| Drooping sedge | Carex pendula | APHIS, Floridata | not listed | not listed | B |
| Smooth distaff thistle | Carthamus baeticus | ODA, WSNWCB | not listed | A | W |
| Woolly distaff thistle | Carthamus lanatus | CalFlora | not listed | A | W |
| Whitestem distaff thistle | Carthamus leucocaulos | ODA | not listed | W | W |
| Wild safflower | Carthamus oxyacantha | not listed | W | W | |
| Longspine sandbur | Cenchrus longispinus | WSNWCB, | C | not listed | C |
| Purple starthistle | Centaurea calcitrapa | King County, NISIC, WSNWCB | A | A | A |
| Diffuse knapweed | Centaurea diffusa | CABI, King County, WSNWCB | B | B | B |
| Iberian starthistle | Centaurea iberica | CABI, ODA, UCDavis | not listed | A | A |
| Brown knapweed | Centaurea jacea | KingCounty | B | not listed | B |
| Bighead knapweed | Centaurea macrocephala | CABI, KingCounty | A | W | A |
| Spotted knapweed | Centaurea maculosa (C. stoebe) | BugwoodWiki, King County, USFS | B | B | B |
| Black knapweed | Centaurea nigra | King County, VRO | B | not listed | B |
| Vochin knapweed | Centaurea nigrescens | King County, WSNWCB | A | not listed | A |
| Meadow knapweed | Centaurea pratensis (C. jacea x nigra) | King County, ODA | B | B | B |
| Yellow starthistle | Centaurea solstitialis | CABI, WSNWCB | B | B | B |
| Feather-headed knapweed | Centaurea trichocephala | not listed | W | W | |
| Squarrose knapweed | Centaurea virgata | ODA | not listed | A | A |
| Rush skeletonweed | Chondrilla juncea | USDA, Weed Control | B | B | B |
| Chicory | Cichorium intybus | CABI | C | ||
| Canada thistle | Cirsium arvense | USFS, WSNWCB | C | B | C |
| Bull thistle | Cirsium vulgare | C | B | C | |
| Oriental clematis | Clematis orientalis | King County | A | not listed | A |
| Old man’s beard | Clematis vitalba | CABI, King County | C | B | C |
| Poison hemlock | Conium maculatum | BugwoodWiki, King County, WSNWCB | B | B | B |
| Field bindweed | Convolvulus arvensis | CABI, King County, USFS | C | B | C |
| Jubata grass | Cortaderia jubata | APHIS, WSNWCB | C | B | B |
| Pampass grass | Cortaderia selloana | Thurston County | C | not listed | C |
| English hawthorn | Crataegus laevigata | not listed | W | C | |
| Common crupina | Crupina vulgaris | CABI, King County | A | B | W |
| Smoothseed alfalfa dodder | Cuscuta approximata | C | not listed | C | |
| Japanese dodder | Cuscuta japonica | CABI, ODA | not listed | A | W |
| Dodder | Cuscuta spp. | not listed | B | B | |
| Houndstongue | Cynoglossum officinale | CABI, King County, ODA | B | B | B |
| Yellow nutsedge | Cyperus esculentus | CABI, King County | B | B | B |
| Purple nutsedge | Cyperus rotundus | BugwoodWiki, CABI, ODA, ODA Risk | not listed | A | A |
| Scotch broom | Cytisus scoparius | ODA, King County | B | B | B |
| Portuguese broom | Cytisus striatus | not listed | B | W | |
| Spurge laurel | Daphne laureola | King County | B | B | B |
| Jimsonweed | Datura stramonium | BugwoodWiki, CABI | C | ||
| Wild carrot | Daucus carota | BugwoodWiki, CABI, Weed Control, | C | not listed | C |
| Cape ivy | Deleria odorata | not listed | W | W | |
| Common teasel | Dipsacus fullonum | CABI, King County, USFS, | C | not listed | C |
| Cutleaf teasel | Dipsacus laciniatus | not listed | B | W | |
| Tower-of-jewels | Echium pininana | not listed | W | W | |
| Paterson’s curse | Echium plantagineum | CABI, OSU, | not listed | A | W |
| Blueweed | Echium vulgare | B | W | B | |
| South American waterweed | Egeria densa | B | B | B | |
| Russian olive | Elaeagnus angustifolia | BugwoodWiki, CABI, WSNWCB | C | not listed | C |
| Hairy willow-herb | Epilobium hirsutum | B | not listed | B | |
| Spanish heath | Erica lusitanica | not listed | B | W | |
| Filaree | Erodium cicutarium | C | |||
| Toothed spurge | Euphorbia dentata | not listed | W | W | |
| Leafy spurge | Euphorbia esula | BugwoodWiki, CABI, King County | B | B | A |
| Mole spurge | Euphorbia lathyris | not listed | not listed | C | |
| Myrtle spurge | Euphorbia myrsinites | B | B | B | |
| Oblong spurge | Euphorbia oblongata | ODA, ODA Risk, WSNWCB | A | A | A |
| Bohemian knotweed | Fallopia × bohemica (Polygonum x bohemicum) | CABI, King County, WSNWCB | B | not listed | B |
| Japanese knotweed | Fallopia japonica (Polygonum cuspidatum) | CABI, King County | B | B | B |
| Giant knotweed | Fallopia sachalinensis (Polygonum sachalinensis); | CABI, | B | B | B |
| Common fennel | Foeniculum vulgare | BugwoodWiki, CABI, | B | not listed | B |
| Goatsrue | Galega officinalis | CABI, King County, ODA, ODA Risk | A | A | A |
| French broom | Genista monspessulana | BugwoodWiki, CABI, King County, ODA, WSNWCB | A | B | A |
| Shiny leaf geranium | Geranium lucidum | ODA, WSNWCB | A | B | A |
| Herb robert | Geranium robertianum | King County, WSNWCB | B | B | B |
| Reed sweetgrass | Glyceria maxima | BugwoodWiki, CABI, WSNWCB | A | not listed | A |
| Babysbreath | Gypsophila paniculata | C | not listed | C | |
| Halogeton | Halogeton glomeratus | not listed | B | W | |
| English ivy | Hedera helix | BugwoodWiki, CABI, King County | C (listed cultivars) | B | B |
| Irish ivy | Hedera hibernica | C (listed cultivars) | B | B | |
| Texas blueweed | Helianthus ciliaris | CABI, King County, WSNWCB | A | not listed | A |
| Spikeweed | Hemizonia pungens | C | B | C | |
| Giant hogweed | Heracleum mantegazzianum | BugwoodWiki, CABI, King County, ODA, ODA Risk | A | A | A |
| Polar hawkweed | Hieracium atratum | B | not listed | W | |
| Orange hawkweed | Hieracium aurantiacum | BugwoodWiki, CABI, King County, ODA, ODA Risk | B | A | A |
| Meadow hawkweed | Hieracium caespitosum | CABI, King County | B | B | B |
| Whiplash hawkweed | Hieracium flagellare | B | not listed | W | |
| Yellow hawkweed | Hieracium floribundum | BugwoodWiki, ODA Risk, WSNWCB | B | A | A |
| Queen-devil hawkweed | Hieracium glomeratum | B | not listed | W | |
| Common hawkweed | Hieracium lachenalii | B | not listed | B | |
| Pale hawkweed | Hieracium lactucella | B | not listed | W | |
| Smooth hawkweed | Hieracium laevigatum | B | not listed | W | |
| Spotted hawkweed | Hieracium maculatum | B | not listed | W | |
| Wall hawkweed | Hieracium murorum | B | not listed | W | |
| Mouse-ear hawkweed | Hieracium pilosella | BugwoodWiki, CABI, King County BMP, ODA | B | A | A |
| King-devil hawkweed | Hieracium piloselloides | King County, ODA, WSNWCB | B | A | A |
| European hawkweed | Hieracium sabaudum | B | not listed | W | |
| Hydrilla | Hydrilla verticillata | BugwoodWiki, CABI, King County, ODA | A | A | A |
| European frogbit | Hydrocharis morsus-ranae | not listed | W | W | |
| Black henbane | Hyoscyamus niger | C | not listed | C | |
| St. Johnswort | Hypericum perforatum | CABI, WRIC, WSNWCB | C | B | C |
| Common catsear | Hypochaeris radicata | CABI, WRIC, WSNWCB | C | not listed | C |
| Spotted jewelweed | Impatiens capensis | not listed | W | W | |
| Policeman’s helmet | Impatiens glandulifera | CABI, King County | B | B | B |
| Yellow flag iris | Iris pseudacorus | King County, USFS, WRIC | C | B | B |
| Dyers woad | Isatis tinctoria | BugwoodWiki, King County, ODA, USFS | A | B | A |
| Kochia | Kochia scoparia | B | B | B | |
| Yellow archangel | Lamiastrum galeobdolon | King County, WSNWCB | B | B | B |
| Perennial peavine | Lathyrus latifolius | not listed | B | C | |
| Lens-podded whitetop | Lepidium chalepensis | not listed | B | B | |
| Hoary cress | Lepidium draba (Cardaria draba) | C | B | B | |
| Perennial pepperweed | Lepidium latifolium | BugwoodWiki, CABI, USFS | B | B | B |
| Hairy whitetop | Lepidium pubescens (Cardaria pubescens) | CABI, USFS | C | B | C |
| Lepyrodiclis | Lepyrodiclis holosteoides | C | not listed | W | |
| Oxeye daisy | Leucanthemum vulgare | C | not listed | C | |
| South American spongeplant | Limnobium laevigatum | not listed | W | W | |
| Dalmatian toadflax | Linaria dalmatica | B | B | B | |
| Yellow toadflax | Linaria vulgaris | C | B | C | |
| Water primrose | Ludwigia grandiflora | not listed | B | B | |
| Water primrose | Ludwigia hexapetala | B | B | B | |
| Water primrose | Ludwigia peploides | BugwoodWiki, CABI, King County, WSNWCB | A | B | A |
| Money plant | lunaria annua | not listed | not listed | C | |
| Rose campion | Lychnus Coronaria | not listed | W | W | |
| Garden loosestrife | Lysimachia vulgaris | B | not listed | W | |
| Purple loosestrife | Lythrum salicaria | B | B | B | |
| Wand loosestrife | Lythrum virgatum | B | not listed | W | |
| Scentless mayweed | Matricaria perforata | C | not listed | C | |
| Wild four o’clock | Mirabilis nyctaginea | A | not listed | W | |
| Parrots feather | Myriophyllum aquaticum | B | B | B | |
| Variable-leaf milfoil | Myriophyllum heterophyllum | CABI, King County, WSNWCB | A | not listed | A |
| Eurasian watermilfoil | Myriophyllum spicatum | B | B | B | |
| Matgrass | Nardus stricta | not listed | A | W | |
| Fragrant water lily | Nymphaea odorata | C | not listed | C | |
| Yellow floating heart | Nymphoides peltata | BugwoodWiki, King County, ODA, ODA Risk | B | A | A |
| Scotch thistle | Onopordum acanthium | B | B | B | |
| Taurian thistle | Onopordum tauricum | not listed | A | W | |
| Small broomrape | Orobanche minor | BugwoodWiki, CABI | not listed | A | A |
| African rue | Peganum harmala | not listed | A | W | |
| Mile-a-minute | Persicaria perfoliata | not listed | W | W | |
| Japanese butterbur | Petasites japonica | not listed | not listed | B | |
| Reed canarygrass | Phalaris arundinacea | C | W | C | |
| Ribbon grass | Phalaris arundinacea | C | B | C | |
| Common reed | Phragmites australis ssp. Australis | B | B | B | |
| American pokeweed | Phytolacca americana | BugwoodWiki | not listed | not listed | A |
| Hawkweed oxtongue | Picris hieracioides | B | not listed | B | |
| Himalayan knotweed | Polygonum polystachyum | B | B | B | |
| Curly-leaf pondweed | Potamogeton crispus | C | not listed | C | |
| Sulfur cinquefoil | Potentilla recta | B | B | B | |
| Kudzu | Pueraria lobata | BugwoodWiki, CABI, King County, ODA Risk | A | A | A |
| Lesser celandine | Ranunculus ficaria | B | B | B | |
| Bridal Veil broom | Retama monosperma | Cal-IPC | not listed | not listed | A |
| Austrian fieldcress | Rorippa austriaca | C | not listed | C | |
| Creeping yellow cress | Rorippa sylvestris | ODA | not listed | A | A |
| Sweet briar rose | Rosa rubiginosa | not listed | W | W | |
| Himalayan blackberry | Rubus bifrons (R. armeniacus, R. procerus, R. discolor) | C | B | C | |
| Evergreen blackberry | Rubus laciniatus | C | not listed | C | |
| Ravenna grass | Saccharum ravennae | BugwoodWiki, WSNWCB | A | W | A |
| Grass-leaved arrowhead | Sagittaria graminea | B | not listed | W | |
| Russian thistle | Salsola tragus | C | |||
| Mediterranean sage | Salvia aethiopis | BugwoodWiki, King County, ODA, WSNWCB | A | not listed | A |
| Meadow clary | Salvia pratensis | A | not listed | W | |
| Clary sage | Salvia sclarea | A | W | W | |
| Ricefield bulrush | Schoenoplectus mucronatus | King County, WSNWCB | A | W | A |
| Cereal rye | Secale cereale | C | not listed | C | |
| Tansy ragwort | Senecio jacobaea | B | B | B | |
| Common groundsel | Senecio vulgaris | C | not listed | C | |
| White cockle | Silene latifolia ssp. alba | C | not listed | C | |
| Blessed milk thistle | Silybum marianum | BugwoodWiki, CABI, King County, King County BMP, WSNWCB | A | B | A |
| Silverleaf nightshade | Solanum elaeagnifolium | Bugwood, CABI, ODA, ODA Risk, WSNWCB | A | A | A |
| Buffalobur | Solanum rostratum | C | B | C | |
| Sticky nightshade | Solanum sisymbriifolium | not listed | W | W | |
| Field Burrweed | Soliva sessilis | C | not listed | W | |
| Perennial sowthistle | Sonchus arvensis ssp. arvensis | C | not listed | C | |
| Johnsongrass | Sorghum halepense | BugwoodWiki, CABI, ODA, USFS, WSNWCB | A | B | A |
| Smooth cordgrass | Spartina alterniflora | A | A | W | |
| Common cordgrass | Spartina anglica | A | A | W | |
| Dense-flowered cordgrass | Spartina densiflora | A | A | W | |
| Saltmeadow cordgrass | Spartina patens | A | A | W | |
| Spanish broom | Spartium junceum | BugwoodWiki, King County, King County BMP, WSNWCB | A | B | A |
| Swainsonpea | Sphaerophysa salsula | C | B | C | |
| Medusahead rye | Taeniatherum caput-medusae | not listed | B | C | |
| Saltcedar | Tamarix ramosissima | B | B | B | |
| Common tansy | Tanacetum vulgare | C | not listed | C | |
| Spurge flax | Thymelaea passerina | A | not listed | W | |
| Salsify | Tragopogon dubius | C | |||
| European water chestnut | Trapa natans | BugwoodWiki, CABI, ODA, | not listed | A | A |
| Puncturevine | Tribulus terrestris | B | B | B | |
| Coltsfoot | Tussilago farfara | BugwoodWiki, ODA, USFS, WSNWCB | not listed | A | A |
| Narrowleaf cattail | Typha angustifolia | C | not listed | C | |
| Southern cattail | Typha domingensis | C | not listed | W | |
| Miniature cattail | Typha minima | C | not listed | W | |
| White cattail | Typha x glauca | C | not listed | W | |
| Gorse | Ulex europaeus | BugwoodWiki, CABI, King County, King County BMP, WSNWCB | B | B | A |
| Ventenata | Ventenata dubia | not listed | W | C | |
| Common mullein | Verbascum thapsus | not listed | not listed | C | |
| Vinca major | Vinca major L. | Not listed | Not listed | C | |
| Spiny cocklebur | Xanthium spinosum | C | B | C | |
| Japanese eelgrass | Zostera japonica | C | W | W | |
| Syrian bean-caper | Zygophyllum fabago | BugwoodWiki, King County, ODA, WSNWCB | A | A | A |
Columbia Gorge 