= Poisonous to animal and/or
human
= Noxious or Invasive in
Oregon
= Crop weed in Oregon
= Federal Noxious weed in
Oregon
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Narrow-leaved
nama Nama depressum
Narrowleaf Cattail Typha angustifolia
Nebada, Nebeda,
Nep, Nepeta
or Nip Nepeta cataria
Nevada pea Lathyrus lanszwertii
Nievitas Cryptantha Cryptantha intermedia
Ning xia gou qi Lycium barbarum Syn Lycium
megistocarpum, Lycium lanceolatum, Lycium halimifolium, Lycium europaeum, Lycium vulgare
Nodding bur-marigold or Nodding bur-weed
Bidens cernua L.
Noonflower or Noontide - Tragopogon dubius,
syn T.
pratensis, T. dubius subsp. campestris, T. major
Northern bugleweed, Northern
water-horehound Lycopus
uniflorus
Northern Mountain Ash Pyrus Decorus
Northern Willowherb Epilobium ciliatum syn
Epilobium glandulosum or Epilobium watsonii
Oldstem
idahoa Idahoa scapigera
One-Flowered Bugleweed
Lycopus uniflorus
One-o'clock Leontodon taraxacum
L. syn: Taraxacum officinale Webber.
Oregon fireweed Epilobium oreganum
Oregon Grape Berberis Spp syn: Mahonia spp
Oregon Sunflower Balsamorhiza sagittata
Oval-leaf knotweed Polygonum arenastrum
Ovate Goatgrass Aegilops ovata
Oxalis Oxalis Europea
Oyster plant - Tragopogon porrifolius
Pacific
trillium Trillium ovatum ssp ovatum
Pai Mai Ken Lotus corniculatus L.
syn Lotus corniculatus L., Lotus ambiguus, Lotus balticus, Lotus carpetanus, Lotus
corniculatus subsp. major, Lotus corniculatus var. major, Lotus komarovii, Lotus major ,
Lotus olgae, Lotus peczoricus, Lotus ruprechtii, Lotus tauricus, Lotus ucrainicus, Lotus
zhegulensis, Trigonella corniculatus L.
Palo Duro or Palo Ludo
Cercocarpus betuloides
Palouse Tarweed Amsinckia retrorsa Suksd.
Pasture Sage Artemisia ludoviciana
Pears Prunus Spp.
Penjer Malva neglecta
Pennsylvania smartweed Polygonum pensylvanicum Linnaeus
Pepper-plant Polygonum hydropiper syn Polygonum
fastigiatoramosum, Polygonum maximowiczii, Persicaria fastigiatoramosa,
Persicaria hydropiper L.
Pepperwort Lepidium Chalapensis syn. Cardaria chalapensis
Pepperwort Lepidium perfoliatum
Perennial pepper-grass Lepidium draba L. syn Cardaria draba
Persicaria or Perzikkruid Polygonum
hydropiper syn Polygonum fastigiatoramosum, Polygonum
maximowiczii, Persicaria fastigiatoramosa, Persicaria hydropiper L.
Peygamber Cicegi Centaurea cyanus L
Phacelia Phacelia hastata
Phacelia Phacelia heterophylla
Philezharge Lycium europaeum syn Lycium intricatum
Pick Pocket Capsella bursa-pastoris
Pigweed Chenopodium album
Pimienta Acuatica Polygonum hydropiper syn
Polygonum fastigiatoramosum, Polygonum maximowiczii, Persicaria
fastigiatoramosa, Persicaria hydropiper L.
Pin
Cherry Prunus spp.
Pincushion flower - Chaenactis douglasii
Pineapple Weed Chamomilla suaveolens syn Matricaria
matricarioides, Matricaria suaveolens, Matricaria discoidea
Pink Needle Erodium cicutarium
Pinkweed Polygonum pensylvanicum Linnaeus
Pinnate tansymustard
Descurainia sophia
Piper's Desert Parsley Lomatium piperi
Plantain d'eau Flûteau Alisma plantago-aquatica
Plectritis Plectritis macrocera
Plums Prunus spp.
Poison buttercup - Ranunculus sceleratus L.
Poison Hemlock or Poison
Parsley Conium maculatum
Poison
sego lily Zygadenus venenosus
Popcorn Flower Cryptantha intermedia
Potamot de l' Ilinois Potamogeton
illinoensis syn P. angustifolius, P.
lucens
Poverty sumpweed, Poverty weed
Iva axillaris syn Iva axillaris subsp.
robustior, Iva axillaris var. robustior
Prairie Dandelion Nothocalais troximoides syn Microseris
troximoides
Prairie flax Linum lewisii var. lewisii
Prairie Sage Artemisia ludoviciana
Prickly Glasswort, Prickly
Russian Thistle or Prickly Saltwort Salsola tragus L. syn
S. iberica, S. australis, S. kali, S. kali L. ssp. ruthenica, S. kali L. ssp.
tragus L., S. kali L. ssp. tenuifolia, S. pestifer, S. ruthenica
Prickly Lettuce Lactuca serriola syn
Latuca scariola
Prickly nightshade Solanum rostratum
Prostrate pigweed Amaranthus lividus
Pubescent Wheatgrass
Thinopyrum intermedium Syn Thinopyrum intermedium ssp. barbulatum,
Agropyron intermedium, Agropyron intermedium var. trichophorum, Agropyron trichophorum,
Elymus hispidus, Elymus hispidus ssp. barbulatus, Elymus hispidus var. ruthenicus,
Elytrigia intermedia, Elytrigia intermedia ssp. barbulata, Elytrigia intermedia ssp.
trichophora
Puccoon Lithospermum ruderale
Purple amaranth Amaranthus lividus
Purple salsify - Tragopogon porrifolius
Purple-leaved Willowherb Epilobium ciliatum syn
Epilobium glandulosum or Epilobium watsonii
Pussytoes Antennaria dimorpha syn Antennaria
dimorpha var. integra, Antennaria dimorpha var. latisquama, Antennaria dimorpha var.
macrocephala, Antennaria latisquama, Antennaria macrocephala, Gnaphalium dimorphum
Pweve D'Ewe Polygonum hydropiper syn Polygonum
fastigiatoramosum, Polygonum maximowiczii, Persicaria fastigiatoramosa,
Persicaria hydropiper L.
Quinine brush Larrea tridentata syn Kunzia tridentata, Purshia tridentata
Rabbit's Foot, Rabbitfoot polypogon, Rabbitsfoot Grass Polypogon monspeliensis syn Alopecurus
monspeliensis L.
Radicchio Cichorium intybus L. syn
Cichorium intybus var. foliosum, Cichorium intybus var. sativum
Rambler Rose Rosa Multiflora
Ratamosarpio Alisma plantago-aquatica
Rattlesnake tail - Chaenactis douglasii
Rayless Chamomile Chamomilla suaveolens syn Matricaria
matricarioides, Matricaria suaveolens, Matricaria discoidea
Rayless Ragwort Senecio aronicoides
Red Indian Paintbrush Castilleja miniata
Redleaf, Redknees, Red leg, or Redshanks Polygonum
hydropiper syn Polygonum fastigiatoramosum, Polygonum
maximowiczii, Persicaria fastigiatoramosa, Persicaria hydropiper L.
Redstem Filaree Erodium cicutarium
Reed canary grass Phalaris arundinacea var Picta syn
Pharalis arundinaera var picta
Reed Canarygrass Phalaris arundinacea
Regel's mountain penstemon Penstemon roezlii
Retrose fiddleneck Amsinckia retrorsa Suksd.
Rietgras, Ribbon grass
Phalaris arundinacea
Ribbon grass Phalaris arundinacea
Ribbon grass Phalaris arundinacea var
Picta syn Pharalis arundinaera var picta
Rigid Fiddleneck Amsinckia retrorsa Suksd.
Ripgut Brome or Ripgut grass Bromus diandrus
Rispige Flockenblume Centaurea Stoebe syn Centaurea rhenana
Rock-star or Rock star
Lithophragma glabrum
Rocky Mountain buttercup Ranunculus cymbalaria var.
saximontanus
Roezl's Penstemon Penstemon roezlii
Rogon Chichegi - Ranunculus
sceleratus L.
Roseau cane Phragmites australis
Rosemary Rosmarinus officinalis
Roses Rosa spp.
Rough Eyelash Blepharipappus scaber
Rough Fiddleneck Amsinckia retrorsa Suksd.
Rough Horsetail Equisetum hyemale L.
Roundleaf Mallow Malva neglecta
Rovo Rubus fruticosis
Royal Beardtongue Penstemon speciosus
Royal penstemon Penstemon speciosus
Rubber rabbitbrush Ericameria nauseosa syn Chrysothamnus nauseosus
Russian Sage Perovskia atriplicifolia
Russian Thistle Salsola tragus L. syn
S. iberica, S. australis, S. kali, S. kali L. ssp. ruthenica, S. kali L. ssp.
tragus L., S. kali L. ssp. tenuifolia, S. pestifer, S. ruthenica
Rye grain Secale cereale
Sacred Datura, Sacred Thornapple
Datura wrightii Syn D. innoxia, D. meteloides
St. Barnaby's
thistle Centaurea
solstitialis syn Leucantha solstitialis
Sagebrush Mariposa Lily Calochortus macrocarpus
Sagebrush Penstemon Penstemon speciosus
Sagewort Artemisia
ludoviciana
Sagesse
or Sagesse
des chirurgiens
Descurainia sophia Syn Sisymbrium sophia
Sai Pi Li Ka Medicago sativa
Salal Gaultheria shallon
Salatzichorie
Cichorium intybus L. syn
Cichorium intybus var. foliosum, Cichorium intybus var.
sativum
Salmon-colored collomia
Collomia grandiflora
Salsifis majeur
- Tragopogon dubius, syn T.
pratensis, T. dubius subsp. campestris, T. major
Salt and Pepper Lomatium piperi
Saltcedar Tamarix parviflora
Saltgrass Distichlis spicata (L.) Greene
Saltwort
Salsola tragus L. syn S. iberica, S. australis, S. kali, S.
kali L. ssp. ruthenica, S. kali L. ssp. tragus L., S. kali L. ssp. tenuifolia,
S. pestifer, S. ruthenica
Sandune Wallflower Cheiranthus Spp.
Sardonia - Ranunculus
sceleratus L.
Satin Flower Lunaria annua
Scaldhead
Rubus fruticosis
Scale pod Idahoa
scapigera
Scarlet Paintbrush Castilleja miniata
Scentless Chamomile or Scentless
mayweed Matricaria maritima
Schorrenzoutgras Triglochin maritima
Scotch Broom Cytisus spp.
Scotch Thistle Onopordum acanthium L
Scourwort Saponaria
Officinalis
Sea arrow grass or Seaside
Arrowgrass Triglochin maritima
Seaside crowfoot Ranunculus cymbalaria var.
saximontanus
Sentoria
Centaurea cyanus L
Serpentine rockcress Arabis cobrensis
Service
Berry Amelanchier alnifolia
Seven-sisters Rose Rosa Multiflora
Shamrock Trifolium repens
Shasta Daisy Chrysanthemum maximum
Shasta Hoary-aster Machaeranthera canescens
var. shastensis
Shasta Tansyaster Machaeranthera canescens
ssp. canescens var. shastensis
Shattercane Sorghum bicolor
Shephard's
Purse Capsella bursa-pastoris
Shield cress or Shield
peppergrass Lepidium perfoliatum
Shih Lung Jui, Shui Chin
- Ranunculus sceleratus L.
Shockley's Goldenhead Acamptopappus shockleyi
Shoes & Slippers Lotus
corniculatus L. syn Lotus corniculatus L., Lotus ambiguus, Lotus
balticus, Lotus carpetanus, Lotus corniculatus subsp. major, Lotus corniculatus
var. major, Lotus komarovii, Lotus major , Lotus olgae, Lotus peczoricus,
Lotus ruprechtii, Lotus tauricus, Lotus ucrainicus, Lotus zhegulensis, Trigonella
corniculatus L.
Shooting Star Dodecatheon jeffreyi
Shore Buttercup Ranunculus cymbalaria var.
saximontanus
Shortpod Thelypody or
Short-podded Thelypodium
Thelypodium brachycarpum Endangered
Showy penstemon Penstemon speciosus
Shrubby Blackberry
Rubus fruticosis
Shu Yang Ch'Uan
Solanum dulcamara
Sickle-weed
Polygonum hydropiper syn Polygonum fastigiatoramosum,
Polygonum maximowiczii, Persicaria fastigiatoramosa, Persicaria hydropiper
L.
Sierra shooting star Dodecatheon jeffreyi
Silky Crazyweed Oxytropis sericea Nutt.
Silver Dollar Plant Lunaria annua
Silver Wormwood Artemisia ludoviciana
Silverleaf Phacelia Phacelia
hastata
Silverweed or Silverweed
Cinquefoil Potentilla anserina
Simplestem Bur-reed
Sparganium Erectum
Skydrop aster
Symphyotrichum patens
Slender amaranth Amaranthus lividus
Slender Annual Fireweed or Slender
Fireweed Epilobium minutum
Slender bugleweed
Lycopus uniflorus
Slender Goldenweed Machaeranthera gracilis
syn Aplopappus gracilis, Dieteria gracilis Nutt., Haplopappus
gracilis, Haplopappus ravenii, Sideranthus gracilis
Slender willow-herb
Epilobium ciliatum syn Epilobium glandulosum or Epilobium watsonii
Small-headed spotted knapweed
Centaurea Stoebe syn Centaurea rhenana
Small Jacob's ladder Polemonium micranthum
Smallflowered marshelder Iva axillaris
syn Iva axillaris subsp. robustior, Iva
axillaris var. robustior
Small-flowered Paintbrush
Castilleja miniata
Smartass
or Smartweed Polygonum hydropiper syn
Polygonum fastigiatoramosum, Polygonum maximowiczii, Persicaria
fastigiatoramosa, Persicaria hydropiper L.
Smith bluestem Pascopyrum
smithii syn Agropyron smithii
Smooth Cat's Ear
Hypochaeris glabra
Smooth hawk's-beard Crepis capillaris syn
Crepis virens
L.
Smooth Pigweed
Chenopodium album
Smooth-leaved violet Viola
purpurea ssp. integrifolia
Smultronklöver Trifolium fragiferum
syn Trifolium bonannii, Trifolium fragiferum
subsp. bonannii, Trifolium neglectum
Snake-weed
Polygonum hydropiper syn Polygonum fastigiatoramosum,
Polygonum maximowiczii, Persicaria fastigiatoramosa, Persicaria hydropiper
L.
Sneezeweed Helenium
autumnale
Soapwort Saponaria
Officinalis
Sofia or
Sofiekruid Descurainia sophia Syn
Sisymbrium sophia
Sonnwend-Flockenblume
Centaurea solstitialis
syn Leucantha solstitialis
Sourgrass Oxalis Europea
Southern Bulrush Scirpus californicus
Southern Goldenrod Solidago
Confinis
Sparrige
Flockenblume Acosta diffusa
Spatterdock
Nuphar lutea
Spider
Mum Chrysanthemum Spp.
Spike Grass Distichlis spicata (L.) Greene
Spiny Saltwort
- Salsola tragus L. syn S. iberica, S. australis, S. kali,
S. kali L. ssp. ruthenica, S. kali L. ssp. tragus L., S. kali L. ssp. tenuifolia,
S. pestifer, S. ruthenica
Spotted Cat's
Ear Hypochaeris Radicata
Spotted Knapweed
Centaureas maculosa
Spotted Ladysthumb
Polygonum hydropiper syn Polygonum fastigiatoramosum,
Polygonum maximowiczii, Persicaria fastigiatoramosa, Persicaria hydropiper
L.
Spreading Aster
Symphyotrichum patens
Spreading knapweed
Acosta diffusa
Spring gold Crocidium multicaule
Spring of Jerusalem
Lycopus uniflorus
Star Moss Tortula ruraliformis
Synonym: Syntrichia ruraliformis
Stekend Loogkruid
Salsola tragus L. syn S. iberica, S. australis, S. kali, S.
kali L. ssp. ruthenica, S. kali L. ssp. tragus L., S. kali L. ssp. tenuifolia,
S. pestifer, S. ruthenica
Steppen-Flockenblume
Centaurea Stoebe syn Centaurea rhenana
Stick-tights Bidens frondosa
Stickywilly
Galium aparine
Stinging Nettle Urtica dioica L.
Stinking
mayweed Matricaria maritima
Stinking
rabbitbrush Ericameria nauseosa syn Chrysothamnus nauseosus
Stinkweed
Thlaspi arvense L.
Stoneseed Lithospermum ruderale
Storksbill
Erodium cicutarium
Strawberry
Blite or Strawberry Spinach Amaranthus lividus
Strawberry Clover Trifolium fragiferum syn
Trifolium bonannii,
Trifolium fragiferum subsp. bonannii, Trifolium neglectum
Strawberry'n Cream Ribbon Grass Phalaris arundinacea
var Picta syn Pharalis arundinaera var picta
Succory
Cichorium intybus L. syn
Cichorium intybus var. foliosum, Cichorium intybus var.
sativum
Sulfur flower buckwheat Eriogonum umbellatum
Summer-cypress Kochia scoparia
Sunflower Balsamorhiza sagittata
Svalting Alisma plantago-aquatica
Swamp Knotweed Polygonum
amphibium
Sweet Betty Saponaria
Officinalis