The invasive non-native plant section is a listing of plants which the City of Salem considers undesirable for use in all landscaping situations within the City limits and plants which are prohibited from use by Oregon State law (OAR 603-52-1200(4)). This provision applies to the below named species only, and includes any sub-species, varieties, or cultivars of these species.
Salem's List of Undesirable Plants
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Hedera helix |
English ivy |
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Phalaris arundinacea |
reed canarygrass |
FACW |
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Rubus discolor |
Himalayan blackberry |
FACU |
Noxious weeds are defined by the Oregon State Weed Board as exotic, non-native species that are injurious to public health, agriculture, recreation, wildlife, or any public or private property. The plant species in the following tables are prohibited from entry into the state; and transport, purchase, sale, or offering for sale in the state (OAR 603-52-1200(4)). The list of noxious weeds is updated periodically.
Table A. Noxious Weeds With Limited Infestation
Common Name |
Scientific Name |
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Common Name |
Scientific Name |
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African rue |
peganum harmala |
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purple nutsedge |
cyperus rotundus |
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barbed goatgrass |
aegilops triuncialis |
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purple starthistle |
centaurea calcitrapa |
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bearded creeper (common crupina) |
crupina vulgaris |
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short-fringed knapweed |
centaurea nigrescens |
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big-headed knapweed |
centaurea macrocephala |
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silverleaf nightshade |
solanum elaegnifolium |
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bulbed goatgrass |
aegilops ventricosa |
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skeletonleaf bursage |
ambrosia tomentosa |
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camelthorn |
alhagi pseudalhagi |
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smooth cordgrass |
spartina alterniflora |
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coltsfoot |
tussilago farfara |
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smooth distaff thistle |
carthamus baeticus |
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feather-headed knapweed |
centaurea trichocephala |
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spartina |
spartina densiflora |
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giant hogweed |
heracleum mantegazzianum |
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spartina |
Spartina anglica |
| hydrilla |
hydrilla verticillata |
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squarrose knapweed |
Centaurea virgata |
| Iberian starthistl |
centaurea iberica |
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Syrian bean-caper |
zygophyllum fabago |
| kudzu |
pueraria lobata |
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Tausch's goatgrass |
aegilops tauschii |
| lepyrodiclis |
lepyrodiclis holosteoides |
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Texas blueweed |
helianthus ciliaris |
| matgrass |
nardus stricta |
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whitestem distaff thistle |
carthamus leucocaulos |
| ovate goatgrass |
aegilops ovata |
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Wild safflower |
carthamus oxycantha |
| plumeless thistle |
carduus alanthoides |
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wooly distaff thistle |
carthamus lanatus |
Table B. Noxious Weeds With Regional Infestation
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Common Name |
Scientific Name |
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Common Name |
Scientific Name |
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Austrian peaweed (swainsonpea) |
sphaerophysa salsula |
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Medusahead rye |
Taeniatherum caput-medusae |
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biddy-biddy |
Acaena novae-zelandiae |
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Musk thistle |
Carduus nutans |
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buffaloburr |
Solanum rostratum |
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Perennial pepperweed |
Lepidium latifolium |
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bull thistle.... |
Cirsium vulgare |
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Poison hemlock. |
Conium maculatum |
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Canada thistle |
Cirsium arvense |
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Portugese broom broom |
Cytisus striatus |
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creeping yellow cress |
Rorippa sylvestris |
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Puncturevine |
Tribulus terrestris |
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dalmation toadflax |
Linaria dalmatica |
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Purple loosestrife |
Lythrum salicaria |
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diffuse knapweed.. |
Centaurea diffusa |
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Quackgrass |
Agropyron repens |
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dodder |
Cuscuta spp. |
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Ragweed |
Ambrosia artemisiifolia |
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Dyers woad. |
Isatis tinctoria |
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Rush skeletonweed |
Chondrilla juncea |
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Eurasian watermilfoil |
Myriophyllum spicatum |
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Russian knapweed |
Centaurea repens |
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field bindweed |
Convolvulus arvensis |
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Scot's broom* |
Cytisus scoparius |
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French broom. |
Cytisus monspessulanas |
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Scotch thistle |
Onopordum acanthium |
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giant horsetail |
Equisetum telmateia |
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Slender-flowered thistle |
Carduus tenuiflorus |
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giant knotweed |
Polygonum sachalinense |
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South American waterweed (Elodea) |
Elodea (=egeria) densa |
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globe-podded thistle |
Cardaria pubescens |
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Spartina |
Spartina patens |
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gorse |
Ulex europaeus |
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Spanish broom |
Spartium junceum |
| halogeton |
Halogeton glomeratus |
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Pokeweed |
Hemizonia pungens |
| Himalayan knotweek |
Polygonum polystachyum |
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Spiny cocklebur |
Xanthium spinosum |
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houndstongue |
Cynoglossum officinale |
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Spotted knapweed |
Centaurea maculosa |
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Italian thistle |
Carduus pycnocephalus |
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Sulfur cinquefoil |
Potentilla recta |
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Japanese knotweed (fleece flower) |
Polygonum cuspidatum |
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Tamarix
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Tamarix ramosissima
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Johnsongrass
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Sorghum halepense
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Tansy ragwort
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Senecio jacobaea |
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jointed goatgrass |
Aegilops cylindrica |
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Velvetleaf |
Abutilon theophrasti |
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kochia |
Kochia scoparia |
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White top (Hoary cress) |
Cardaria spp. |
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leafy spurge |
Euphorbia esula |
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Wild proso millet |
Panicum miliaceum |
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lens-podded thistle |
Cardaria chalapensis |
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Yellow nutsedge |
Cyperus esculentus |
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Mediterranean sage |
Salvia aethiopis |
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Yellow toadflax |
Linaria vulgaris |
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(*except sterile, horticultural varieties) |