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Invasive Species and the National Parks
Weeds of Oregon
Symbol
Scientific Name
Noxious
Common Name
State
Noxious Status
U.S. Nativity
ABTH Abutilon theophrasti Medik. velvetleaf "B" designated weed I
ACNO4 Acaena novae-zelandica Kirk biddy biddy "B" designated weed I
ACRE3 Acroptilon repens (L.) DC.

I
CERE6 Centaurea repens L. Russian knapweed "B" designated weed
AECY Aegilops cylindrica Host jointed goatgrass "B" designated weed I
AEGE Aegilops geniculata Roth

I
AEOV2  Aegilops ovata L. p.p. ovate goatgrass "A" designated weed
AETA2 Aegilops tauschii Coss. Tausch's goatgrass "A" designated weed XU
AETR Aegilops triuncialis L. barbed goatgrass "A" designated weed I
AEVE Aegilops ventricosa Tausch barbed goatgrass "A" designated weed XU
ALMA12 Alhagi maurorum Medik.

I
ALPS3  Alhagi pseudalhagi (Bieb.) Desv. ex B. Keller & Schaparenko camelthorn "A" designated weed
AMAR2 Ambrosia artemisiifolia L. ragweed "B" designated weed N
AMARA2 Ambrosia artemisiifolia L. var. artemisiifolia ragweed "B" designated weed N
AMARE Ambrosia artemisiifolia L. var. elatior (L.) Descourtils ragweed "B" designated weed N
AMARP Ambrosia artemisiifolia L. var. paniculata (Michx.) Blank. ragweed "B" designated weed N
AMTO3 Ambrosia tomentosa Nutt. skeletonleaf bursage "A" designated weed N
CACH10 Cardaria chalapensis (L.) Hand.-Maz. whitetop "B" designated weed I
CADR Cardaria draba (L.) Desv. whitetop "B" designated weed I
CAPU6 Cardaria pubescens (C.A. Mey.) Jarmolenko whitetop "B" designated weed I
CANU4 Carduus nutans L. musk thistle "B" designated weed I
CANUL Carduus nutans L. ssp. leiophyllus (Petrovic) Stojanov & Stef. musk thistle "B" designated weed I
CANUM Carduus nutans L. ssp. macrocephalus (Desf.) Nyman musk thistle "B" designated weed I
CANUM2 Carduus nutans L. ssp. macrolepis (Peterm.) Kazmi musk thistle "B" designated weed I
CANUN Carduus nutans L. ssp. nutans musk thistle "B" designated weed I
CAPY2 Carduus pycnocephalus L. Italian thisle "B" designated weed I
CATE2 Carduus tenuiflorus W. Curtis slender-flowered thisle "B" designated weed I
CALA20 Carthamus lanatus L. woolly distaff thistle "A" designated weed I
CALAB2 Carthamus lanatus L. ssp. baeticus (Boiss. & Reut.) Nyman woolly distaff thistle "A" designated weed I
CABA5  Carthamus baeticus (Boiss. & Reut.) Lara smooth distaff thistle "A" designated weed
CALAL10 Carthamus lanatus L. ssp. lanatus woolly distaff thistle "A" designated weed I
CALE52 Carthamus leucocaulos Sibith. & Sm. whitestem distaff thistle "A" designated weed I
CAOX2 Carthamus oxyacantha Bieb. wild safflower "A" designated weed XU
CEBI2 Centaurea biebersteinii DC.

I
CEMA4  Centaurea maculosa auct. non Lam. spotted knapweed "B" designated weed
CECA2 Centaurea calcitrapa L. purple starthistle "A" designated weed I
CEDET Centaurea debeauxii Gren. & Godr. ssp. thuillieri Dostál

I
CEPR2  Centaurea pratensis Thuill., non Salisb. meadow knapweed "B" designated weed
CEDI3 Centaurea diffusa Lam. diffuse knapweed "B" designated weed I
CEIB Centaurea iberica Trev. ex Spreng. Iberian starthistle "A" designated weed I
CEMA9 Centaurea macrocephala Puschk. ex Willd. big-headed knapweed "A" designated weed I
CENI3 Centaurea nigrescens Willd. short-fringed knapweed "A" designated weed I
CESO3 Centaurea solstitialis L. yellow starthistle "B" designated weed I
CETR12 Centaurea trichocephala Bieb. ex Willd. feather-headed knapweed "A" designated weed I
CETR8 Centaurea triumfettii All.

I
CEVI  Centaurea virgata Lam. squarrose knapweed "A" designated weed
CHJU Chondrilla juncea L. rush skeletonweed "B" designated weed I
CIAR4 Cirsium arvense (L.) Scop. Canada thistle "B" designated weed I
CIVU Cirsium vulgare (Savi) Ten. bull thistle "B" designated weed I
COMA2 Conium maculatum L. poison hemlock "B" designated weed I
COAR4 Convolvulus arvensis L. field bindweed "B" designated weed I
CRVU2 Crupina vulgaris Cass. bearded creeper "A" designated weed I
CUAM3 Cuscuta americana L. American dodder "B" designated weed N
CUAP Cuscuta applanata Engelm. gila river dodder "B" designated weed N
CUAP2 Cuscuta approximata Bab. smoothseed alfalfa dodder "B" designated weed I
CUAT Cuscuta attenuata Waterfall tapertip dodder "B" designated weed N
CUBO Cuscuta boldinghii Urban Boldingh's dodder "B" designated weed I
CUBR Cuscuta brachycalyx (Yuncker) Yuncker San Joaquin dodder "B" designated weed N
CUBRA Cuscuta brachycalyx (Yuncker) Yuncker var. apodanthera (Yuncker) Yuncker San Joaquin dodder "B" designated weed N
CUBRB Cuscuta brachycalyx (Yuncker) Yuncker var. brachycalyx San Joaquin dodder "B" designated weed N
CUCA Cuscuta californica Hook. & Arn. California dodder "B" designated weed N
CUCAA Cuscuta californica Hook. & Arn. var. apiculata Engelm. chaparral dodder "B" designated weed N
CUCAB Cuscuta californica Hook. & Arn. var. breviflora Engelm. California dodder "B" designated weed N
CUCAC Cuscuta californica Hook. & Arn. var. californica chaparral dodder "B" designated weed N
CUCAP Cuscuta californica Hook. & Arn. var. papillosa Yuncker chaparral dodder "B" designated weed N
CUCA5 Cuscuta cassytoides Nees ex Engelm. African dodder "B" designated weed I
CUCE2 Cuscuta ceanothi Behr canyon dodder "B" designated weed N
CUCE Cuscuta cephalanthi Engelm. buttonbush dodder "B" designated weed N
CUCO2 Cuscuta compacta Juss. ex Choisy compact dodder "B" designated weed N
CUCOC Cuscuta compacta Juss. ex Choisy var. compacta compact dodder "B" designated weed N
CUCOE Cuscuta compacta Juss. ex Choisy var. efimbriata Yuncker compact dodder "B" designated weed N
CUCO3 Cuscuta coryli Engelm. hazel dodder "B" designated weed N
CUCU2 Cuscuta cuspidata Engelm. cusp dodder "B" designated weed N
CUDE Cuscuta decipiens Yuncker TransPecos dodder "B" designated weed N
CUDE3 Cuscuta dentatasquamata Yuncker los pinitos dodder "B" designated weed N
CUDE2 Cuscuta denticulata Engelm. desert dodder "B" designated weed N
CUDED Cuscuta denticulata Engelm. var. denticulata smalltooth dodder "B" designated weed N
CUDEV Cuscuta denticulata Engelm. var. vetchii (Brandeg.) T. Beliz Vetch's dodder "B" designated weed N
CUEP2 Cuscuta epilinum Weihe flax dodder "B" designated weed I
CUEP Cuscuta epithymum (L.) L. clover dodder "B" designated weed I
CUER Cuscuta erosa Yuncker Sonoran dodder "B" designated weed N
CUEU Cuscuta europaea L. greater dodder "B" designated weed I
CUEX Cuscuta exaltata Engelm. tall dodder "B" designated weed N
CUFA Cuscuta fasciculata Yuncker clustered dodder "B" designated weed N
CUGL5 Cuscuta globulosa Benth. West Indian dodder "B" designated weed N
CUGL3 Cuscuta glomerata Choisy rope dodder "B" designated weed N
CUGR Cuscuta gronovii Willd. ex J.A. Schultes scaldweed "B" designated weed N
CUGRC Cuscuta gronovii Willd. ex J.A. Schultes var. calyptrata Engelm. scaldweed "B" designated weed N
CUGRG Cuscuta gronovii Willd. ex J.A. Schultes var. gronovii love dodder "B" designated weed N
CUHA Cuscuta harperi Small Harper's dodder "B" designated weed N
CUHO Cuscuta howelliana Rubtzoff Boggs Lake dodder "B" designated weed N
CUIN Cuscuta indecora Choisy bigseed alfalfa dodder "B" designated weed N
CUINB Cuscuta indecora Choisy var. bifida Yuncker bigseed alfalfa dodder "B" designated weed N
CUINI Cuscuta indecora Choisy var. indecora bigseed alfalfa dodder "B" designated weed N
CUINL Cuscuta indecora Choisy var. longisepala Yuncker bigseed dodder "B" designated weed N
CUINN Cuscuta indecora Choisy var. neuropetala (Engelm.) A.S. Hitchc. bigseed dodder "B" designated weed N
CUJA Cuscuta japonica Choisy Japanese dodder "B" designated weed I
CULE Cuscuta leptantha Engelm. slender dodder "B" designated weed N
CUME4 Cuscuta megalocarpa Rydb. bigfruit dodder "B" designated weed N
CUMI2 Cuscuta mitriformis Engelm. Cochise dodder "B" designated weed N
CUOB Cuscuta obtusiflora Kunth Peruvian dodder "B" designated weed N
CUOBG Cuscuta obtusiflora Kunth var. glandulosa Engelm. Peruvian dodder "B" designated weed N
CUOD Cuscuta odontolepis Engelm. Santa Rita Mountain dodder "B" designated weed N
CUPE3 Cuscuta pentagona Engelm. fiveangled dodder "B" designated weed N
CUPEG Cuscuta pentagona Engelm. var. glabrior (Engelm.) Gandhi, Thomas & Hatch bushclover dodder "B" designated weed N
CUPEP2 Cuscuta pentagona Engelm. var. pentagona fiveangled dodder "B" designated weed N
CUPEP3 Cuscuta pentagona Engelm. var. pubescens (Engelm.) Yuncker bushclover dodder "B" designated weed N
CUPL Cuscuta plattensis A. Nels. prairie dodder "B" designated weed N
CUPO Cuscuta polygonorum Engelm. smartweed dodder "B" designated weed N
CUPO2 Cuscuta potosina Schaffn. globe dodder "B" designated weed N
CUPOG Cuscuta potosina Schaffn. var. globifera Yuncker globe dodder "B" designated weed N
CURO Cuscuta rostrata Shuttlw. ex Engelm. & Gray beaked dodder "B" designated weed N
CURU Cuscuta runyonii Yuncker Runyon's dodder "B" designated weed N
CUSA Cuscuta salina Engelm. saltmarsh dodder "B" designated weed N
CUSAM Cuscuta salina Engelm. var. major Yuncker goldenthread "B" designated weed N
CUSAP Cuscuta salina Engelm. var. papillata Yuncker goldenthread "B" designated weed N
CUSAS Cuscuta salina Engelm. var. salina saltmarsh dodder "B" designated weed N
CUSA2 Cuscuta sandwichiana Choisy kauna'oa "B" designated weed N
CUSQ Cuscuta squamata Engelm. scaleflower dodder "B" designated weed N
CUSU Cuscuta suaveolens Ser. fringed dodder "B" designated weed I
CUSU3 Cuscuta suksdorfii Yuncker mountain dodder "B" designated weed N
CUSUS Cuscuta suksdorfii Yuncker var. subpedicellata Yuncker mountain dodder "B" designated weed N
CUSUS2 Cuscuta suksdorfii Yuncker var. suksdorfii Suksdorf's dodder "B" designated weed N
CUTU Cuscuta tuberculata Brandeg. tubercle dodder "B" designated weed N
CUUM Cuscuta umbellata Kunth flatglobe dodder "B" designated weed N
CUVI2 Cuscuta vivipara T. Beliz, sp. nov. ined. lovevine "B" designated weed XU
CUWA2 Cuscuta warneri Yuncker Warner's dodder "B" designated weed N
CYOF Cynoglossum officinale L. houndstongue "B" designated weed I
CYES Cyperus esculentus L. yellow nutsedge "B" designated weed NI
CYESH Cyperus esculentus L. var. hermannii (Buckl.) Britt. yellow nutsedge "B" designated weed N
CYESL Cyperus esculentus L. var. leptostachyus Boeckl. yellow nutsedge "B" designated weed N
CYESM Cyperus esculentus L. var. macrostachyus Boeckl. yellow nutsedge "B" designated weed N
CYESS Cyperus esculentus L. var. sativus Boeckl. yellow nutsedge "B" designated weed I
CYRO Cyperus rotundus L. purple nutsedge "A" designated weed I
CYSC4 Cytisus scoparius (L.) Link Scotch broom "B" designated weed I
CYSCA Cytisus scoparius (L.) Link var. andreanus (Puiss.) Dippel Scotch broom "B" designated weed I
CYSCS2 Cytisus scoparius (L.) Link var. scoparius Scotch broom "B" designated weed I
CYST7 Cytisus striatus (Hill) Rothm. Portugese broom "B" designated weed I
EGDE Egeria densa Planch.

I
ELDE3  Elodea densa (Planch.) Caspary South American waterweed "B" designated weed
ELRE4 Elymus repens (L.) Gould

I
AGRE2  Agropyron repens (L.) Beauv. quackgrass "B" designated weed
EQAR Equisetum arvense L. western horsetail "B" designated weed N
EQTE Equisetum telmateia Ehrh. giant horsetail "B" designated weed N
EQTEB Equisetum telmateia Ehrh. var. braunii (Milde) Milde giant horsetail "B" designated weed N
EUES Euphorbia esula L. leafy spurge "B" designated weed I
EUESE Euphorbia esula L. var. esula leafy spurge "B" designated weed I
EUESO Euphorbia esula L. var. orientalis Boiss. leafy spurge "B" designated weed I
EUESU Euphorbia esula L. var. uralensis (Fisch. ex Link) Dorn leafy spurge "B" designated weed I
GEMO2 Genista monspessulana (L.) L. Johnson

I
   CYMO5 Cytisus monspessulanus L. French broom "B" designated weed
HAGL Halogeton glomeratus (Bieb.) C.A. Mey. halogeton "B" designated weed I
HECI Helianthus ciliaris DC. Texas blueweed "A" designated weed N
HEPU5 Hemizonia pungens (Hook. & Arn.) Torr. & Gray spikeweed "B" designated weed N
HEPUL Hemizonia pungens (Hook. & Arn.) Torr. & Gray ssp. laevis Keck spikeweed "B" designated weed N
HEPUM Hemizonia pungens (Hook. & Arn.) Torr. & Gray ssp. maritima (Greene) Keck spikeweed "B" designated weed N
HEPUP Hemizonia pungens (Hook. & Arn.) Torr. & Gray ssp. pungens spikeweed "B" designated weed N
HEPUS2 Hemizonia pungens (Hook. & Arn.) Torr. & Gray ssp. septentrionalis Keck spikeweed "B" designated weed N
HEMA17 Heracleum mantegazzianum Sommier & Levier giant hogweed "A" designated weed I
HYVE3 Hydrilla verticillata (L. f.) Royle hydrilla "A" designated weed I
HYPE Hypericum perforatum L. St. John's wort "B" designated weed I
ISTI Isatis tinctoria L. dyer's woad "B" designated weed I
KOSC Kochia scoparia (L.) Schrad. kochia "B" designated weed I
LELA2 Lepidium latifolium L. perennial pepperweed "B" designated weed I
LEHO7 Lepyrodiclis holosteoides (C.A. Mey.) Fenzl ex Fisch. & C.A. Mey. lepyrodiclis "A" designated weed I
LIDA Linaria dalmatica (L.) P. Mill. Dalmatian toadflax "B" designated weed I
LIDAD Linaria dalmatica (L.) P. Mill. ssp. dalmatica Dalmatian toadflax "B" designated weed I
LIDAM Linaria dalmatica (L.) P. Mill. ssp. macedonica (Griseb.) D.A. Sutton Dalmatian toadflax "B" designated weed I
LIVU2 Linaria vulgaris P. Mill. yellow toadflax "B" designated weed I
LYSA2 Lythrum salicaria L. purple loosestrife Quarantined noxious weed I
LYVI3 Lythrum virgatum L. purple loosestrife Quarantined noxious weed I
MYSP2 Myriophyllum spicatum L. Eurasian watermilfoil "B" designated weed I
NAST3 Nardus stricta L. matgrass "A" designated weed I
ONAC Onopordum acanthium L. Scotch thistle "B" designated weed I
PAMI2 Panicum miliaceum L. wild proso millet "B" designated weed I
PAMIM Panicum miliaceum L. ssp. miliaceum wild proso millet "B" designated weed I
PAMIR Panicum miliaceum L. ssp. ruderale (Kitagawa) Tzvelev wild proso millet "B" designated weed I
PEHA Peganum harmala L. African rue "A" designated weed I
POCU6 Polygonum cuspidatum Sieb. & Zucc. Japanese knotweed "B" designated weed I
POPO5 Polygonum polystachyum Wallich ex Meisn. Himalyan knotweed "B" designated weed I
POSA4 Polygonum sachalinense F. Schmidt ex Maxim. giant knotweed "B" designated weed I
PORE5 Potentilla recta L. sulfur cinquefoil "B" designated weed I
PUMOL Pueraria montana (Lour.) Merr. var. lobata (Willd.) Maesen & S. Almeida

I
PULO Pueraria lobata (Willd.) Ohwi kudzu "A" designated weed
PULO Pueraria lobata (Willd.) Ohwi kudzu Quarantined noxious weed
ROSY Rorippa sylvestris (L.) Bess. creeping yellow cress "B" designated weed I
SAAE Salvia aethiopis L. Mediterranean sage "B" designated weed I
SEJA Senecio jacobaea L. tansy ragwort "B" designated weed I
SIMA3 Silybum marianum (L.) Gaertn. milk thistle "B" designated weed I
SOEL Solanum elaeagnifolium Cav. silverleaf nightshade "A" designated weed N
SORO3 Solanum robustum Wendl. shrubby nightshade "B" designated weed I
SORO Solanum rostratum Dunal buffalobur "B" designated weed N
SOHA Sorghum halepense (L.) Pers. Johnsongrass "B" designated weed I
SPAL Spartina alterniflora Loisel. smooth cordgrass "A" designated weed N
SPAN5 Spartina anglica C.E. Hubbard common cordgrass "A" designated weed I
SPDE2 Spartina densiflora Brongn. denseflower cordgrass "A" designated weed I
SPPA Spartina patens (Ait.) Muhl. salt meadow cordgrass "B" designated weed N
SPJU2 Spartium junceum L. Spanish broom "B" designated weed I
SPSA3 Sphaerophysa salsula (Pallas) DC. Austrian peaweed "B" designated weed I
TACA8 Taeniatherum caput-medusae (L.) Nevski medusahead rye "B" designated weed I
TRTE Tribulus terrestris L. puncturevine "B" designated weed I
TUFA Tussilago farfara L. coltsfoot "A" designated weed I
ULEU Ulex europaeus L. gorse "B" designated weed I
XASP2 Xanthium spinosum L. spiny cocklebur "B" designated weed I
ZYFA Zygophyllum fabago L. Syrian beancaper "A" designated weed I

*N =Native, N? =probably native, NI=some populations native, some introduced, I =Introduced, I? =probably introduced, XU = Not in US or cultivated, ? =unknown.

The above list found in, and mandated by:

     Oregon Department of Agriculture. 1997. Noxious Weed Policy and Classification System. Oregon Department of Agriculture.
     State of Oregon. 1997. Oregon Revised Statute Section 561.510, State Department of Agriculture, General Quarantine Powers. State of Oregon.

Plant codes as found at:

USDA, NRCS. 2002. The PLANTS Database, Version 3.5 ( http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.


Additional information about noxious plants in Oregon can be found at:

Oregon Department of Agriculture
Oregon State: Forage Information System: Weeds
Oregon State: Weed Identification Page
Pacific Northwest Exotic Pest Plant Council

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 updated 10/26/03