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Sometimes plants used in landscapes are actually invasive plants and noxious weeds which will crowd out native plants. Avoid planting these plants. It is illegal to plant or transport plants which are listed as Oregon Noxious Weeds.
These weeds have been selected as top priority for control. The complete list of Oregon noxious weeds can be found at Oregon Noxious Weeds
T indicates weeds targeted for control or eradication. Trees Ailanthus altissima Tree of Heaven Oregon Noxious Weed Crataegus monogyna Oneseed Hawthorn Oregon Noxious Weed Elaeagnus angustifolia Russian Olive Invasive Plant Shrubs Buddleia davidii Butterfly Bush Oregon Noxious Weed Buddleia variabilis Butterfly Bush Oregon Noxious Weed Cytisus scoparius Scotch Broom Oregon Noxious Weed Cytisus striatus Portuguese Broom Oregon Noxious Weed T Daphne laureola Spurge Laurel Oregon Noxious Weed Genista monspessulana French Broom Oregon Noxious Weed Rosa canina Dog Rose Oregon Noxious Weed Rosa rubiginosa Sweetbriar Rose Oregon Noxious Weed Rubus armeniacus Armenian Blackberry Oregon Noxious Weed Rubus discolor Himalayan Blackberry Oregon Noxious Weed Rubus procerus Himalayan Blackberry Oregon Noxious Weed Spartium junceum Spanish Broom Oregon Noxious Weed Tamarix ramosissima Tamarisk, Salt Cedar Oregon Noxious Weed T Ulex europaeus Gorse Oregon Noxious Weed Groundcovers and Vines Clematis vitalba Old Man's Beard Oregon Noxious Weed Delairea odorata Cape Ivy Oregon Noxious Weed T Hedera helix English Ivy Oregon Noxious Weed Hedera hibernica Irish Ivy Oregon Noxious Weed Pueraria lobata Kudzu Oregon Noxious Weed T Tribulus terrestris Puncturevine Oregon Noxious Weed Annuals and Perennials Abutilon theophrasti Velvetleaf Oregon Noxious Weed Aceana novae-zealandiae Biddy-Biddy Oregon Noxious Weed Acroptilon repens Russian Knapweed Oregon Noxious Weed Adonis aestivalis Pheasant’s Eye Oregon Noxious Weed Aegilops cylindrica Jointed Goatgrass Oregon Noxious Weed Aegilops triuncialis Barbed Goatgrass Oregon Noxious Weed T Alliaria petiolata Garlic Mustard Oregon Noxious Weed T Alyssum corsicum Yelllowtuft Oregon Noxious Weed T Alyssum murale Yelllowtuft Oregon Noxious Weed T Ambrosia artemisifolia Ragweed Oregon Noxious Weed Amorpha fruticosa Indigo Bush Oregon Noxious Weed Anchusa officinalis Common Bugloss Oregon Noxious Weed T Arundo donax Giant Reed Oregon Noxious Weed T Berteroa incana Hoary Alyssum Oregon Noxious Weed T Brachypodium sylvaticum False Brome Oregon Noxious Weed Carduus acanthoides Plumeless Thistle Oregon Noxious Weed T Carduus crispis Welted Thistle Oregon Noxious Weed T Carduus nutans Musk Thistle Oregon Noxious Weed Carduus pycnocephalus Italian Thistle Oregon Noxious Weed Carthamus lanatus Wooly Distaff Thistle Oregon Noxious Weed T Centaurea diffusa Diffuse Knapweed Oregon Noxious Weed Centaurea calcitrapa Purple Starthistle Oregon Noxious Weed T Centaurea iberica Iberian Starthistle Oregon Noxious Weed T Centaurea pratensis Meadow Knapweed Oregon Noxious Weed Centaurea solstitialis Yellow Starthistle Oregon Noxious Weed Centaurea stoebe Spotted Knapweed Oregon Noxious Weed T Centaurea virgata Squarrose Knapweed Oregon Noxious Weed T Chondrilla junceaa Rush Skeletonweed Oregon Noxious Weed T Cirsium arvense Canada Thistle Oregon Noxious Weed Cirsium vulgare Bull Thistle Oregon Noxious Weed Conium maculatum Poison Hemlock Oregon Noxious Weed Convolvulus arvensis Field Bindweed Oregon Noxious Weed Cortaderia jubata Jubata Grass, Purple Pampasgrass Oregon Noxious Weed Crupina vulgaris Common Crupina Oregon Noxious Weed Cuscuta approximate Smoothseed alfalfa Dodder Oregon Noxious Weed Cuscuta indecora Bigseed Dodder Oregon Noxious Weed Cuscuta pentagona Five-angled Dodder Oregon Noxious Weed Cynoglossum officinale Houndstongue Oregon Noxious Weed Cyperus esculentus Yellow Nutsedge Oregon Noxious Weed Cyperus rotundas Purple Nutsedge Oregon Noxious Weed Cytissus scoparius Scotch Broom Oregon Noxious Weed Ctyissus striatus Portuguese Broom Oregon Noxious Weed T Dispascus laciniatus Cutleaf Teasel Oregon Noxious Weed Echium pininana Pine Echium Oregon Noxious Weed Echium plantagineum Paterson’s Curse Oregon Noxious Weed T Erica lusitanica Spanish Heath Oregon Noxious Weed Euphorbia esula Leafy Spurge Oregon Noxious Weed T Euphorbia myrsinites Myrtle Spurge Oregon Noxious Weed Euphorbia oblongata Oblong Spurge Oregon Noxious Weed T Fallopia japonica Japanese Knotweed Oregon Noxious Weed Fallopia sachalinensis Giant Knotweed Oregon Noxious Weed Fallopia x bohemica Bohemian Knotweed Oregon Noxious Weed Galega officinalis Goatsrue Oregon Noxious Weed T Genista monspessulana French Broom Oregon Noxious Weed Geranium lucidum Shiny Leaf Geranium Oregon Noxious Weed Geranium robertianum Herb Robert, Stinky Bob Oregon Noxious Weed Halogeton glomeratus Halogeton Oregon Noxious Weed Hemizonia pungens Spikeweed Oregon Noxious Weed Heracleum mantegazzianum Giant Hogweed Oregon Noxious Weed T Hieracium aurantiacum Orange Hawkweed Oregon Noxious Weed Hieracium floribundum Yellow Hawkweed Oregon Noxious Weed Hieracium pratense Meadow Hawkweed Oregon Noxious Weed T Impatiens glandulifera Policeman's Helmet, Jewelweed Oregon Noxious Weed Isatis tinctoria Dywer’s Woad Oregon Noxious Weed Kochia scoparia Mexican Fireweed Oregon Noxious Weed Lamiastrum galeobdolon Yellow Archangel Oregon Noxious Weed Lathyrus latifolius Perennial Peavine Oregon Noxious Weed Lepidium draba Whitetop, Hoary Cress Oregon Noxious Weed Lepidium latifolium Perennial Pepperweed Oregon Noxious Weed T Lepidium pubescens Hairy Whitetop Oregon Noxious Weed Linaria dalmatica Dalmatian Toadflax Oregon Noxious Weed T Linaria vulgaris Yellow Toadflax Oregon Noxious Weed Lysimachia vulgaris Garden Yellow Loosestrife Oregon Noxious Weed T Lythrum salicaria Purple Loosestrife Oregon Noxious Weed Nardus stricta Matgrass Oregon Noxious Weed T Onopordum acanthium Scotch Thistle Oregon Noxious Weed Onopordum tauricum Taurian Thistle Oregon Noxious Weed T Orabanche minor Small Broomrape Oregon Noxious Weed Peganum harmala African Rue Oregon Noxious Weed T Phlaris arundinacea Ribbongrass, Reed Canarygrass Oregon Noxious Weed T Pilosella aurantiacum Orange Hawkweed Oregon Noxious Weed T Pilosella caespitosa Meadow Hawkweed Oregon Noxious Weed T Pilosella floribundum Yellow Hawkweed Oregon Noxious Weed T Pilosella pilosella Mouse-ear Hawkweed Oregon Noxious Weed T Polygonum cuspidatum Japanese Knotweed Oregon Noxious Weed Polygonum sachalinense Giant Knotweed Oregon Noxious Weed Polygonum polystchyum Himalayan Knotweed Oregon Noxious Weed Potentilla recta Sulfur Cinquefoil Oregon Noxious Weed Ranunculus ficaria Lesser Celandine Oregon Noxious Weed Saccharum ravennae Ravengrass Oregon Noxious Weed T Salvia aethiopis Mediterranean Sage Oregon Noxious Weed Senecio jaconbaea Tansy Ragwort Oregon Noxious Weed T Silybum marianum Milk Thistle Oregon Noxious Weed Solanum rostratum Buffalobur Oregon Noxious Weed Sorghum halepense Johnsongrass Oregon Noxious Weed Spartium junceun Spanish Broom Oregon Noxious Weed Ulex europaeus Gorse Oregon Noxious Weed T Ventenata dubia Ventenata Grass Oregon Noxious Weed Xanthium spinosum Spiny Cocklebur Oregon Noxious Weed Aquatic and Wetland Plants Butomus umbellatus Flowering rush Oregon Noxious Weed T Egeria densa(Elodea) Brazilian Elodea Oregon Noxious Weed Iris pseudoacorus Yellow Flag Iris Oregon Noxious Weed Ludwigia grandiflora Large-flower Water Primrose Oregon Noxious Weed T Ludwigia hexapetala Water Primrose Oregon Noxious Weed T Ludwigia peploides Floating Water Primrose Oregon Noxious Weed T Lythrum salicaria Purple Loosestrife Oregon Noxious Weed Myriophyllum aquaticum Parrot Feather Oregon Noxious Weed Myriophyllum spicatum Eurasian Watermilfoil Oregon Noxious Weed Nymphoides peltata Yellow Floating Heart Oregon Noxious Weed T Phragmites australis Common Reed Oregon Noxious Weed Rorippa sylvestris Creeping Yellow Cress Oregon Noxious Weed Sagittaria platyphylla Delta Arrowhead Oregon Noxious Weed T Spartina alterniflora Smooth Cordgrass Oregon Noxious Weed T Spartina anglica Common Cordgrass Oregon Noxious Weed Spartina densiflora Dense-flowered Cordgrass Oregon Noxious Weed T Spartina patens Saltmeadow Cordgrass Oregon Noxious Weed T Sphaeruphysa salsula Swainsonpea Oregon Noxious Weed
Click on Oregon Noxious Weeds Profiles for pictures and descriptions of noxious weeds. A Listed Weeds are a minor or a potential problem. B Listed Weeds are a more serious problem. T Listed Weeds have been targeted for high priority control.
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