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Oregon State Noxious Weed List
Clarification of profiles
A List
B list
Clarification of profiles
Oregon Department of Agriculture has compiled profiles of the weeds listed by the Oregon State Weed Board (OSWB).  Profiles include information about the weed, images, and locations in Oregon.
 
These profiles may not reflect the most updated listing by the OSWB, cooperators should always use the Oregon Noxious Weed Policy and Classification for the most up to date and accurate state listed noxious weeds.

A List
"A" Designated weeds as determined by Oregon State Weed Board

Common Name
Scientific Name
Peganum harmala
Alhagi pseudalhagi
Tussilago farfara
Common reed
Phragmites australis ssp. australis
Cordgrass
 
 
Common
Spartina anglica
Dense-flowered
Spartina densiflora
Saltmeadow
Spartina patens
Smooth
Spartina alterniflora
European water chestnut
Trapa natans
Flowering rush
Butomus umbellatus
Giant hogweed
Heracleum mantegazzianum
Goatgrass
 
 
Barbed
Aegilops triuncialis
Ovate
Aegilops ovata
GoatsrueGalega officinalis
Hawkweed
 
 
King-devil
Hieracium piloselloides
Meadow
Hieracium pratense
Mouse-ear
Hieracium pilosella
Orange
Hieracium aurantiacum
Yellow
Hieracium floribundum
Hydrilla
Hydrilla verticillata
Japanese dodder
Cuscuta japonica
Kudzu
Pueraria lobata
Matgrass
Nardus stricta
Oblong spurge
Euphorbia oblongata
Paterson's curse
Echium plantagineum
Purple nutsedge
Cyperus rotundus
Silverleaf nightshade
Solanum elaeagnifolium
Skeletonleaf bursage
Ambrosia tomentosa
Squarrose knapweed
Centaurea virgata
Starthistle
 
 
Iberian
Centaurea iberica
Purple
Centaurea calcitrapa
Syrian bean-caper
Zygophyllum fabago
Thistle
 
 
Plumeless
Carduus acanthoides
Smooth distaff
Carthamus baeticus
Taurian
Onopordum tauricum
Woolly distaff
Carthamus lanatus
White bryonia
Bryonia alba
Yellow floating heart
Nymphoides peltata
Yellow tuft
 Alyssum murale & Alyssum corsicum

B list
"B" designated weeds as determined by Oregon State Weed Board
(*indicates targeted for biological control)
 
 
Common Name
Scientific Name
Armenian blackberry (Himalayan blackberry)Rubus armeniacus (R. procerus, R. discolor)
Biddy-biddy
Acaena novae-zelandiae
Broom
 
 
French*
Genista monspessulana
Portuguese
Cytisus striatus
Scotch*
Cytisus scoparius
Spanish
Spartium junceum
Buffalobur
Solanum rostratum
Butterfly bush
Buddleja davidii (B.variabilis)
Common bugloss
Anchusa officinalis
Common crupina (bearded creeper)Crupina vulgaris
Creeping yellow cress
Rorippa sylvestris
Cutleaf teasel
Dipsacus laciniatus
Dodder
Cuscuta spp.
Dyers woad
Isatis tinctoria
English ivy
Hedera helix (H. hibernica)
Eurasian watermilfoil
Myriophyllum spicatum
False brome
Brachypodium sylvaticum
Field bindweed*
Convolvulus arvensis
Garlic mustard
Alliaria petiolata
 Geranium 
Herb Robert 
Geranium robertianum
Shiny leaf geranium
 Geranium lucidum
Gorse*
Ulex europaeus
Halogeton
Halogeton glomeratus
Houndstongue
Cynoglossum officinale
Johnsongrass
Sorghum halepense
Jointed goatgrass
Aegilops cylindrical
Jubata grass Cortaderia jubata
Knapweeds
 
 
Diffuse*
Centaurea diffusa
Meadow*
Centaurea pratensis (C. jacea x C. nigra)
Russian*
Acroptilon repens
Spotted*
Centaurea stoebe (C. maculosa)
Knotweeds
 
 
Giant
Fallopia sachalinense (Polyganum)

Himalayan
Fallopia polystachyum (Polyganum)

Japanese (fleece flower)
Fallopia japonica (Polyganum cuspidatum)
Kochia
Kochia scoparia
Lesser celandine
Ranunculus ficaria
Mediterranean sage*
Salvia aethiopis
Medusahead rye
Taeniatherum caput-medusae
Old man's beard
Clematis vitalba
Parrots feather
Myriophyllum aquaticum
Perennial peavine
Lathyrus latifolius
Perennial pepperweed
Lepidium latifolium
Poison hemlock
Conium maculatum
Policeman's helmet
Impatiens glandulifera
Puncturevine*
Tribulus terrestris
Purple loosestrife*
Lythrum salicaria
Ragweed
Ambrosia artemisiifolia
Rush skeletonweed*
Chondrilla juncea
Saltcedar*
Tamarix ramosissima
Small broomrape
Orobanche minor
South American waterweed
Egeria densa (Elodea)
Spanish heath Erica lusitanica
SpikeweedMemizonia pungens
Spiny cocklebur
Xanthium spinosum
Spurge laurel
Daphne laureola
Spurge
 
 
Leafy*
Euphorbia esula
Myrtle
Euphorbia myrsinites
St. Johnswort (Klamath weed) *
Hypericum perforatum
Sulfur cinquefoil
Potentilla recta
Swainsonpea (Austrian peaweed)Sphaerophysa salsula
Tansy ragwort*
Senecio jacobaea
Thistles
 
 
Bull*
Cirsium vulgare
Canada*
Cirsium arvense
Italian*
Carduus pycnocephalus
Milk*
Silybum marianum
Musk*
Carduus nutans
Scotch
Onopordum acanthium
Slender-flowered*
Carduus tenuiflorus
Toadflax
 
 
Dalmatian*
Linaria dalmatica (L. genista)

Yellow*
Linaria vulgaris
Velvetleaf
Abutilon theophrasti
Water primroseLudwigia peploides, L. hexapetala, L. grandiflora ssp.
Whitetop
 
 
Hairy
Lepidium pubescens (Cardaria)
Lens-podded
Lepidium chalepensis (Cardaria)
Hoary cress
Lepidium draba (Cardaria)
Yellow archangel
Lamiastrum galeobdolon
Yellow flag iris
Iris pseudacorus
Yellow nutsedge
Cyperus esculentus
Yellow starthistle*
Centaurea solstitialis

Page updated: May 01, 2012