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Invasive and Noxious Weeds

NRCS Invasive Species Policy
Invasive Species Executive Order 13112

Federal and State Noxious Weeds
661 records returned

Click on an accepted name below to view its PLANTS Profile with more information, and web links if available. Noxious weeds that are synonyms are indented beneath the current PLANTS accepted name.

United States Plant Protection and Quarantine. 2006. Federal noxious weed list (24 May 2006). USDA Animal and Plant Health Inspection Service.
USDA APHIS Plant Protection and Quarantine. 2005. Federal domestic quarantines (24 May 2006). USDA APHIS Plant Protection and Quarantine.
Alabama Division of Plant Industry. 2003. Summary of plant protection regulations (20 October 2003). Alabama Department of Agriculture and Industries.
Alaska Division of Agriculture. 1996. State of Alaska prohibited and restricted noxious weeds (20 October 2003). Alaska Department of Natural Resources.
Arizona Plant Services Division. 2005. Prohibited, regulated and restricted noxious weeds (1 May 2006). Arizona Department of Agriculture.
Arkansas Arkansas State Plant Board. 1997. Regulations on plant diseases and pests (20 October 2003). Arkansas State Plant Board.
California California Department of Food and Agriculture. 2003. Pest ratings of noxious weed species and noxious weed seed (20 October 2003). California Department of Food and Agriculture.
California Department of Food and Agriculture. 2003. Plant quarantine manual, California plant quarantine policy - weeds (20 October 2003). California Department of Food and Agriculture.
Food and Agriculture Code. 2003. Camelthorn, Section 7301-7305 (20 October 2003). State of California.
Food and Agriculture Code. 2003. Hydrilla, Section 6048-6049 (20 October 2003). State of California.
Colorado Plant Industry Division. 2003. Rules pertaining to the administration and enforcement of the Colorado Noxious Weed Act (23 January 2006). Colorado Department of Agriculture.
Connecticut Connecticut Invasive Plants Council. 2004. Connecticut invasive plant list (20 April 2005). Connecticut Invasive Plants Council.
Delaware Delaware Department of Agriculture. 1986. Rules and regulations for noxious weed control (23 January 2006). Delaware Department of Agriculture.
Florida Bureau of Aquatic Plant Management. 2002. Aquatic plant importation, transportation, non-nursery cultivation, possession and collection (20 October 2003). Florida Department of Environmental Protection.
Division of Plant Industry. 2000. Introduction or release of plant pests, noxious weeds, arthropods, and biological control agents (20 October 2003). Florida Department of Agriculture & Consumer Services.
Hawaii Division of Plant Industry. 2003. List of plant species designated as noxious weeds (20 October 2003). Hawaii Department of Agriculture.
Idaho Idaho Department of Agriculture. 2006. Noxious weed rules (24 May 2006). Idaho Department of Agriculture.
Illinois Illinois Administrative Code. 2002. Illinois noxious weed law (20 October 2003). State of Illinois.
Indiana Division of Entomology and Plant Pathology. 2003. Summary of plant protection regulations (20 October 2003). Indiana Department of Natural Resources.
Iowa Iowa Department of Agriculture & Land Stewardship. 2002. The Iowa weed law (20 October 2003). Iowa Department of Agriculture & land Stewardship.
Kansas Division of Plant Health. 2003. Kansas noxious weed law (20 October 2003). Kansas Department of Agriculture.
Kentucky Kentucky Revised Statutes. 1990. Department to eradicate noxious weeds on right-of-ways -- advertisement of program (1 May 2006). State of Kentucky.
Louisiana Louisiana State Code. 1995. Agriculture and forestry. State of Louisiana.
Maine Public Laws of Maine. 1999. An act to prevent the spread of invasive aquatic plants (20 October 2003). State of Maine.
Maryland Annotated Code of Maryland. 1994. Weed control (20 October 2003). State of Maryland.
Massachusetts Bureau of Farm Products & Plant Industries. 2006. Massachusetts prohibited plant list (23 January 2006). Massachusetts Department of Agricultural Resources.
Michigan Pesticide and Plant Pest Management Division. 2002. Noxious and restricted weeds and prohibited pants - Michigan (20 October 2003). Michigan Department of Agriculture.
Minnesota Agronomy Services Division. 2003. Minnesota noxious weed rules (20 October 2003). Minnesota Department of Agriculture.
Mississippi Bureau of Plant Industry. 2004. Regulation of noxious weeds (24 May 2006). State of Mississippi.
Missouri Revised Statues of Missouri. 2004. Insect pests and weeds (20 October 2003). Missouri Department of Agriculture.
Montana Montana Department of Agriculture. 2003. Montana noxious weeds list (24 May 2006). Montana Department of Agriculture.
Nebraska Bureau of Plant Industry. 1989. Noxious weed regulations (24 May 2006). Nebraska Department of Agriculture.
Nevada Nevada Administrative Code. 2003. Control of insects, pests, and noxious weeds (20 October 2003). State of Nevada.
New Hampshire New Hampshire Code of Administrative Rules. 2004. Invasive species, Chapter Agr. 3800 (15 September 2004). State of New Hampshire.
New Mexico Office of the Director/Secretary. 1998. New Mexico noxious weed list (20 October 2003). New Mexico Department of Agriculture.
North Carolina North Carolina Department of Agriculture. 2003. Regulations for state noxious weeds (20 October 2003). North Carolina Department of Agriculture.
North Dakota North Dakota Century Code. 2003. Noxious weed control (20 October 2003). State of North Dakota.
Ohio Plant Industry Division. 1997. Noxious weeds (20 October 2003). Ohio Department of Agriculture.
Oklahoma Oklahoma House of Representatives. 1998. House Bill 2277 (20 October 2003). State of Oklahoma.
Oregon Oregon Administrative Rules. 2006. Quarantine; noxious weeds, Chapter 603-52-1200 (24 May 2006). State of Oregon.
Oregon Department of Agriculture. 2006. Noxious weed policy and classification system (24 May 2006). Oregon Department of Agriculture.
Pennsylvania Pennsylvania Department of Agriculture. 2000. Pennsylvania noxious weed control list (20 October 2003). Pennsylvania Department of Agriculture.
South Carolina South Carolina Aquatic Nuisance Species Program. 2003. Illegal aquatic plants in South Carolina (20 October 2003). South Carolina Department of Natural Resources.
State Crop Pest Commission. 1996. Designation of plant pests (24 May 2006). State of South Carolina.
South Dakota South Dakota Code. 1992. Plant quarantine & treatment, Chapter 38-24a, Article 12:51 (24 May 2006). State of South Dakota.
South Dakota Code. 2005. South Dakota weed and pest control, Chapter 38-22, Article 12:62 (24 May 2006). State of South Dakota.
Tennessee Department of Agriculture of Tennessee. 1998. Plant pest act (20 October 2003). Department of Agriculture of Tennessee.
Texas Texas Administrative Code. 2005. Quarantines and noxious plants, Chapter 19 (24 May 2006). State of Texas.
Utah Utah Department of Agriculture. 2003. Utah noxious weed act (20 October 2003). Utah Department of Agriculture.
Vermont Vermont Department of Agriculture, Food and Markets. 2003. Quarantine #3 - noxious weeds (20 October 2003). Vermont Department of Agriculture, Food and Markets.
Virginia Virginia Department of Agriculture and Consumer Services. 2003. Virginia noxious weed law (20 October 2003). Virginia Department of Agriculture and Consumer Services.
Washington Washington Administrative Code. 2005. Noxious weed control, Chapter 16-752 (24 May 2006). State of Washington.
Washington Administrative Code. 2005. State noxious weed list and schedule of monetary penalties, Chapter 16-750 (24 May 2006). State of Washington.
West Virginia West Virginia Department of Agriculture. 2003. Regulations governing the distribution of plant material in West Virginia. West Virginia Department of Agriculture.
Wisconsin Doll, J. 1990. Noxious weeds in Wisconsin (20 October 2003). University of Wisconsin Cooperative Extension Programs.
Wyoming Wyoming Department of Agriculture. 2003. Designated noxious weeds and prohibited noxious weeds (20 October 2003). Wyoming Department of Agriculture.
Symbol Scientific Name Common Name Federal Noxious Status State Noxious Status Native Status*
ABTH Abutilon theophrasti Medik. velvetleaf CO(CW), IA(SNW), OR(BDW, Q), WA(CAW, NWSPQ) L48 (I), CAN (I)
ACME80 Acacia mearnsii De Wild. black wattle HI(NW) L48 (I), HI (I)
ACPA8 Acacia paradoxa DC. paradox acacia CA(BW) L48 (I)
ACNO7 Acaena novae-zelandiae Kirk biddy-biddy L48 (I)
ACNO4 Acaena novae-zelandica Kirk, orth. var. CA(AW), HI(NW), OR(BDW, Q)
ACPA14 Acaena pallida (Kirk) Allen pale biddy-biddy CA(AW) L48 (I)
ACGI Acer ginnala Maxim. Amur maple CT(PINB) L48 (I), CAN (I)
ACPL Acer platanoides L. Norway maple CT(INB), MA(P) L48 (I), CAN (I)
ACPS Acer pseudoplatanus L. sycamore maple CT(PIB), MA(P) L48 (I), CAN (I)
ACBR5 Achnatherum brachychaetum (Godr.) Barkworth shortbristled needlegrass CA(AW) L48 (I)
STBR3 Stipa brachychaeta Godr. AZ(PNW)
ACRE3 Acroptilon repens (L.) DC. hardheads AZ(PNW, RNW), CA(BW), CO(BW), HI(NW), NM(CBW), ND(NW), OR(BDW, Q), WA(CBW) L48 (I), CAN (I)
CERE6 Centaurea repens L. AK(NW), ID(NW), IA(PRNW), KS(NW), MT(CAT1), NV(NW), SC(PP), SD(NW, RNPS), UT(NW), WY(NW)
AECY Aegilops cylindrica Host jointed goatgrass AZ(PNW, RNW), CA(BW), CO(CW), ID(NW), NM(CCW), OR(BDW, Q), WA(CCW) L48 (I)
AEGE Aegilops geniculata Roth ovate goatgrass L48 (I)
AEOV2 Aegilops ovata L. p.p. CA(BW), OR(ADW, Q)
AETR Aegilops triuncialis L. barbed goatgrass CA(BW), OR(ADW, Q) L48 (I)
AEGIN Aeginetia L. aeginetia NW AL(CAW), CA(Q), FL(NW), MA(P), MN(PNW), NC(CAW), OR(Q), SC(PP), VT(CAW)
AEPO Aegopodium podagraria L. bishop's goutweed CT(IB), MA(P), VT(CBW) L48 (I), CAN (I), SPM (I)
AEIN Aeschynomene indica L. Indian jointvetch HI(NW) L48 (N), PR (N)
AERU Aeschynomene rudis Benth. zigzag jointvetch CA(BW) L48 (N), PR (N)
AEVI3 Aeschynomene virginica (L.) Britton, Sterns & Poggenb. Virginia jointvetch AR(NW) L48 (N)
AGAD2 Ageratina adenophora (Spreng.) King & H. Rob. sticky snakeroot NW AL(CAW), CA(Q), FL(NW), HI(NW), MA(P), MN(PNW), NC(CAW), OR(Q), SC(PP), VT(CAW) L48 (I), HI (I)
AGRI2 Ageratina riparia (Regel) King & H. Rob. spreading snakeroot HI(NW) HI (I)
AGGI Agrostemma githago L. common corncockle AR(NW), SC(PP) L48 (I), AK (I), CAN (I)
AIAL Ailanthus altissima (Mill.) Swingle tree of heaven CT(IB), MA(P), NH(PIS), VT(CBW) L48 (I), HI (I), CAN (I)
ALECT2 Alectra Thunb. alectra NW AL(CAW), CA(Q), FL(NW), MA(P), MN(PNW), NC(CAW), OR(Q), SC(PP), VT(CAW)
ALMA12 Alhagi maurorum Medik. camelthorn CA(AW, PN), WA(CBW) L48 (I)
ALCA Alhagi camelorum Fisch. NV(NW), TX(NP)
ALPS3 Alhagi pseudalhagi (M. Bieb.) Desv. ex B. Keller & Schaparenko AZ(PNW, RNW), CO(AW), NM(CAW), OR(ADW, Q)
ALPE4 Alliaria petiolata (M. Bieb.) Cavara & Grande garlic mustard AL(CAW), CT(IB), MA(P), MN(PNW), NH(PIS), OR(BDW, Q), VT(CBW), WA(CAW, NWSPQ) L48 (I), AK (I), CAN (I)
ALLIU Allium L. onion AR(NW)
ALNE3 Allium neapolitanum Cirillo white garlic L48 (I)
NOIN3 Nothoscordum inodorum (Aiton) G. Nicholson CA(BW)
ALPA20 Allium paniculatum L. Mediterranean onion CA(BW) L48 (I)
ALVI Allium vineale L. wild garlic CA(BW), HI(NW) L48 (I), AK (I), CAN (I)
ALVIC3 Allium vineale L. ssp. compactum (Thuill.) Coss. & Germ. compact onion HI(NW) L48 (I)
ALMY Alopecurus myosuroides Huds. slender meadow foxtail WA(CBW) L48 (I), CAN (N)
ALTER2 Alternanthera Forssk. joyweed AR(NW)
ALPH Alternanthera philoxeroides (Mart.) Griseb. alligatorweed AL(CCW), AZ(PNW), CA(AW), FL(PAP1), SC(ILAP, PP), TX(NP) L48 (I), PR (I)
ALSE4 Alternanthera sessilis (L.) R. Br. ex DC. sessile joyweed NW AL(CAW), CA(Q), FL(NW), MA(P), MN(PNW), NC(CAW), OR(Q), SC(PP), VT(CAW) L48 (I), HI (I), PR (N), VI (N)
AMAR2 Ambrosia artemisiifolia L.1 annual ragweed IL(NW), OR(BDW, Q) L48 (N), HI (I), CAN (N)
AMARE Ambrosia artemisiifolia L. var. elatior (L.) Descourtils annual ragweed L48 (I), HI (I), CAN (N)
AMEL2 Ambrosia elatior L. MI(NW)
AMGR5 Ambrosia grayi (A. Nelson) Shinners woollyleaf bur ragweed KS(NW) L48 (N)
AMTO3 Ambrosia tomentosa Nutt. skeletonleaf bur ragweed ID(NW), OR(ADW, Q) L48 (N)
FRDI3 Franseria discolor Nutt. WY(NW)
AMTR Ambrosia trifida L.1 great ragweed CA(BW), DE(NW), IL(NW) L48 (N), CAN (N)
AMFR Amorpha fruticosa L. desert false indigo CT(PIB), WA(CBW, NWSPQ) L48 (N), CAN (N)
AMBR7 Ampelopsis brevipedunculata (Maxim.) Trautv. Amur peppervine CT(PINB), MA(P) L48 (I)
ANAR16 Anchusa arvensis (L.) M. Bieb. small bugloss WA(CBW) L48 (I), CAN (I)
ANOF Anchusa officinalis L. common bugloss OR(BDW, Q), WA(CBW, NWSPQ) L48 (I), CAN (I)
ANBI Andropogon bicornis L. barbas de indio HI(NW) L48 (N), PR (N), VI (N)
ANVI2 Andropogon virginicus L. broomsedge bluestem HI(NW) L48 (N), HI (I), PR (N), CAN (N)
ANCR2 Anoda cristata (L.) Schltdl. crested anoda CO(BW) L48 (N), PR (N)
ANCO6 Anredera cordifolia (Ten.) Steenis heartleaf madeiravine HI(NW) L48 (I), HI (I), PR (I)
ANAR6 Anthemis arvensis L. corn chamomile CO(BW) L48 (I), HI (I), CAN (I)
ANCO2 Anthemis cotula L. stinking chamomile CO(BW), NV(NW) L48 (I), AK (I), HI (I), CAN (I)
ANSY Anthriscus sylvestris (L.) Hoffm. wild chervil MA(P), WA(CBW, NWSPQ) L48 (I), CAN (I)
ARSE8 Araujia sericifera Brot. white bladderflower CA(BW) L48 (I)
ARMI2 Arctium minus Bernh. lesser burdock CO(CW), WY(NW) L48 (I), CAN (I), SPM (I)
ARCA45 Arctotheca calendula (L.) Levyns Capeweed CA(AW) L48 (I)
AREL4 Ardisia elliptica Thunb. shoebutton HI(NW) L48 (I), HI (I)
ARAB3 Artemisia absinthium L. absinthium CO(BW), ND(NW), WA(CCW) L48 (I), CAN (I)
ARHI3 Arthraxon hispidus (Thunb.) Makino small carpgrass CT(PIB), MA(P) L48 (I), HI (I)
ARDO4 Arundo donax L. giant reed TX(NP) L48 (I), HI (I), PR (I), VI (I)
ASFI2 Asphodelus fistulosus L. onionweed NW AL(CAW), CA(Q), FL(NW), MA(P), MN(PNW), NM(CAW), NC(CAW), OR(Q), SC(PP), VT(CAW) L48 (I)
AVST Avena sterilis L. animated oat NW AL(CAW), CA(Q), FL(NW), MA(P), MN(PNW), NC(CAW), OR(Q), SC(PP), VT(CAW) L48 (I), CAN (W)
AZPI Azolla pinnata R. Br. feathered mosquitofern NW AL(CAW), CA(Q), MA(P), NC(CAW), OR(Q), SC(ILAP, PP), VT(CAW) L48 (I)
BASC5 Bassia scoparia (L.) A.J. Scott burningbush L48 (I), CAN (I)
KOSC Kochia scoparia (L.) Schrad. CT(PIB), OR(BDW, Q), WA(CBW, NWSPQ) CAN (I)
BERBE Berberis L.2 barberry MI(P)
BETH Berberis thunbergii DC. Japanese barberry CT(INB), MA(P) L48 (I), CAN (I)
BEVU Berberis vulgaris L. common barberry CT(IB), MA(P), NH(PIS) L48 (I), CAN (I)
BEIN2 Berteroa incana (L.) DC. hoary alyssum MI(NW) L48 (I), CAN (I)
BOFR2 Bocconia frutescens L. parrotweed HI(NW) HI (I), PR (N)
BRSY Brachypodium sylvaticum (Huds.) P. Beauv. slender false brome OR(BDW, Q) L48 (I)
BRASS2 Brassica L. mustard MI(NW)
BRRA2 Bromus racemosus L. bald brome L48 (I), AK (I), CAN (I)
BRCO4 Bromus commutatus Schrad. AR(NW) CAN (I)
BRSE Bromus secalinus L. rye brome AR(NW) L48 (I), AK (I), HI (I), CAN (I)
BRTE Bromus tectorum L. cheatgrass CO(CW), CT(PIB) L48 (I), AK (I), HI (I), CAN (I), GL (I)
BRAL4 Bryonia alba L. white bryony WA(CBW) L48 (I)
BUDA2 Buddleja davidii Franch.3 orange eye butterflybush OR(BDW, Q), WA(CCW) L48 (I), HI (I), PR (I), CAN (I)
BUUM Butomus umbellatus L. flowering rush CT(PIB), VT(CBW), WA(WAWQ) L48 (I), CAN (I)
CACA Cabomba caroliniana A. Gray Carolina fanwort CA(QW), CT(IB), ME(IAP), MA(P), VT(CAW), WA(CBW, WAWQ) L48 (N), CAN (N)
CAST Callitriche stagnalis Scop. pond water-starwort CT(PIB) L48 (I), CAN (I), SPM (I)
CASE13 Calystegia sepium (L.) R. Br. hedge false bindweed TX(NP) L48 (NI), CAN (N), SPM (I)
CASES Calystegia sepium (L.) R. Br. ssp. sepium hedge false bindweed L48 (I)
COSE14 Convolvulus sepium L. AR(NW)
CASA3 Cannabis sativa L. marijuana IL(NW), MN(PNW), MO(NW), PA(NW), WV(NW) L48 (I), HI (I), PR (I), CAN (I)
CAIM Cardamine impatiens L. narrowleaf bittercress CT(IB), MA(P) L48 (I), CAN (I)
CACH42 Cardaria chalepensis (L.) Hand.-Maz. lenspod whitetop L48 (I), CAN (I)
CACH10 Cardaria chalapensis (L.) Hand.-Maz., orth. var. AZ(PNW), CA(BW), OR(BDW, Q) CAN (I)
CADR Cardaria draba (L.) Desv. whitetop AK(NW), AZ(PNW, RNW), CA(BW), CO(BW), ID(NW), KS(NW), MT(CAT1), NV(NW), NM(CAW), OR(BDW, Q), SD(NW, RNPS), UT(NW), WA(CCW), WY(NW) L48 (I), CAN (I)
LEDR Lepidium draba L. IA(PRNW)
CAPU6 Cardaria pubescens (C.A. Mey.) Jarmolenko hairy whitetop AK(NW), AZ(PNW), CA(BW), HI(NW), OR(BDW, Q), WA(CCW), WY(NW) L48 (I), CAN (I)
CAHA13 Cardiospermum halicacabum L. balloon vine AL(CCW), AR(NW), SC(PP), TX(NP) L48 (I), HI (I), PR (N), VI (N)
CARDU Carduus L. plumeless thistle AR(NW), IA(PRNW)
CAAC Carduus acanthoides L. spiny plumeless thistle AZ(PNW), CA(AW), CO(BW), MD(NW), MN(PNW), NE(NW), NC(CBW), OR(ADW, Q), SD(RNPS), WA(CBW, NWSPQ), WV(NW), WY(NW) L48 (I), CAN (I)
CACR2 Carduus crispus L. curly plumeless thistle WV(NW) L48 (I), CAN (I)
CANU4 Carduus nutans L. nodding plumeless thistle CA(AW), CO(BW), ID(NW), IL(NW), KS(NW), KY(NW), MD(NW), MN(PNW), MO(NW), NE(NW), NV(NW), NM(CBW), NC(CBW), ND(NW), OH(PNW), OK(NW), OR(BDW, Q), PA(NW), SD(RNPS), UT(NW), WA(CBW, NWSPQ), WV(NW), WY(NW) L48 (I), CAN (I)
CAPY2 Carduus pycnocephalus L. Italian plumeless thistle CA(CW), OR(BDW, Q), WA(CAW, NWSPQ) L48 (I), HI (I)
CATE2 Carduus tenuiflorus W. Curtis winged plumeless thistle CA(CW), OR(BDW, Q), WA(CAW, NWSPQ) L48 (I)
CAKO2 Carex kobomugi Ohwi Japanese sedge CT(PIB), MA(P) L48 (I)
CALA20 Carthamus lanatus L. woolly distaff thistle CA(BW), OR(ADW, Q) L48 (I), CAN (I)
CALAC3 Carthamus lanatus L. ssp. creticus (L.) Holmboe woolly distaff thistle L48 (I), CAN (I)
CABA5 Carthamus baeticus (Boiss. & Reut.) Nyman CA(BW), OR(ADW, Q)
CALE52 Carthamus leucocaulos Sm. whitestem distaff thistle CA(AW) L48 (I)
CAOX6 Carthamus oxyacanthus M. Bieb. jeweled distaff thistle L48 (I)
CAOX2 Carthamus oxyacantha M. Bieb., orth. var. NW AL(CAW), CA(Q), FL(NW), MA(P), MN(PNW), NC(CAW), OR(Q), SC(PP), VT(CAW)
CACA19 Carum carvi L. caraway CO(BW) L48 (I), CAN (I), GL (I), SPM (I)
CASUA Casuarina Rumph. ex L. sheoak FL(PAP1)
CATA5 Caulerpa taxifolia (Vahl) C. Agardh4 killer alga NW AL(CAW), MA(P), NC(CAW), OR(Q), SC(ILAP, PP), VT(CAW) L48 (I)
CEOR7 Celastrus orbiculatus Thunb. Oriental bittersweet CT(IB), MA(P), NH(PIS), NC(CCW), VT(CBW) L48 (I), CAN (I)
CEEC Cenchrus echinatus L. southern sandbur AZ(PNW, RGNW), CA(CW) L48 (N), HI (I), PR (N), VI (N)
CELO3 Cenchrus longispinus (Hack.) Fernald mat sandbur CA(CW), WA(CBW) L48 (N), CAN (N)
CESP4 Cenchrus spinifex Cav. coastal sandbur L48 (N), PR (N), VI (N)
CEIN4 Cenchrus incertus M.A. Curtis AZ(PNW, RGNW), CA(CW)
CECA2 Centaurea calcitrapa L. red star-thistle AZ(PNW), CA(BW), NV(NW), NM(CAW), OR(ADW, Q), WA(CAW, NWSPQ) L48 (I), CAN (I)
CEDI3 Centaurea diffusa Lam. diffuse knapweed AZ(PNW, RNW), CA(AW), CO(BW), ID(NW), MT(CAT1), NE(NW), NV(NW), NM(CAW), ND(NW), OR(BDW, Q), SD(RNPS), UT(NW), WA(CBW, NWSPQ), WY(NW) L48 (I), CAN (I)
CEIB Centaurea iberica Trevir. ex Spreng. Iberian knapweed AZ(PNW), CA(AW), NV(NW), OR(ADW, Q) L48 (I)
CEJA Centaurea jacea L. brownray knapweed WA(CBW, NWSPQ) L48 (I), CAN (I)
CEMA9 Centaurea macrocephala Puschk. ex Willd. bighead knapweed WA(CAW, NWSPQ) L48 (I), CAN (I)
CEME2 Centaurea melitensis L. Maltese star-thistle NV(NW), NM(CBW) L48 (I), HI (I), CAN (I)
CENI2 Centaurea nigra L. lesser knapweed WA(CBW, NWSPQ) L48 (I), CAN (I), SPM (I)
CENI3 Centaurea nigrescens Willd. Tyrol knapweed OR(BDW, Q), WA(CAW, NWSPQ) L48 (I), CAN (I)
CEPR2 Centaurea pratensis Thuill., nom. illeg., non Salisb. CO(AW), ID(NW), OR(BDW, Q)
CESO3 Centaurea solstitialis L. yellow star-thistle AZ(PNW, RNW), CA(CW), CO(AW), ID(NW), MT(CAT3), NV(NW), NM(CAW), ND(NW), OR(BDW, Q), SD(RNPS), UT(NW), WA(CBW) L48 (I), CAN (I)
CESTM Centaurea stoebe L. ssp. micranthos (Gugler) Hayek spotted knapweed L48 (I), HI (I), CAN (I)
CEBI2 Centaurea biebersteinii DC. CT(IB), MA(P), WA(CBW, NWSPQ)
CEMA4 Centaurea maculosa auct. non Lam. AZ(PNW, RNW), CA(AW), CO(BW), ID(NW), MT(CAT1), NE(NW), NV(NW), NM(CAW), ND(NW), OR(BDW, Q), SD(RNPS), UT(NW), WY(NW)
CESU Centaurea sulphurea Willd. sulphur knapweed AZ(PNW), CA(BW) L48 (I)
CEVI Centaurea virgata Lam. squarrose knapweed CO(AW), OR(ADW, Q) L48 (I)
CEVIS2 Centaurea virgata Lam. ssp. squarrosa (Willd.) Gugler squarrose knapweed L48 (I)
CESQ Centaurea squarrosa Willd. AZ(PNW), CA(AW), UT(NW)
CEVIS Centaurea virgata Lam. var. squarrosa (Willd.) Boiss. NV(NW)
CEPUP6 Centromadia pungens (Hook. & Arn.) Greene ssp. pungens common tarweed L48 (N)
HEPU5 Hemizonia pungens (Hook. & Arn.) Torr. & A. Gray OR(BDW, Q), WA(CCW)
CEHI3 Cereus hildmannianus K. Schum. hedge cactus HI (I), PR (I)
CEUR Cereus uruguayanus auct. non Kiesling HI(NW)
CHMI Chaenorhinum minus (L.) Lange dwarf snapdragon WA(NWSPQ) L48 (I), CAN (I)
CHJU Chondrilla juncea L. rush skeletonweed AZ(PNW), CA(AW), CO(AW), ID(NW), MT(CAT3), NV(NW), OR(BDW, Q), SD(RNPS), WA(CBW) L48 (I), CAN (I)
CHTE2 Chorispora tenella (Pall.) DC. crossflower CA(BW) L48 (I), CAN (W)
CHOD Chromolaena odorata (L.) King & H. Rob. Jack in the bush HI(NW) L48 (N), PR (N), VI (I)
CHAC Chrysopogon aciculatus (Retz.) Trin. golden false beardgrass NW AL(CAW), CA(Q), FL(NW), MA(P), MN(PNW), NC(CAW), OR(Q), SC(PP), VT(CAW) HI (I)
CIIN Cichorium intybus L. chicory CO(CW) L48 (I), CAN (I), SPM (I)
CIMA2 Cicuta maculata L. spotted water hemlock NV(NW) L48 (N), AK (N), CAN (N)
CIRSI Cirsium Mill. thistle AR(NW), IA(PRNW)
CIAR4 Cirsium arvense (L.) Scop. Canada thistle AK(NW), AZ(PNW), CA(BW), CO(BW), CT(PIB), DE(NW), HI(NW), ID(NW), IL(NW), IN(NW), IA(PRNW), KS(NW), KY(NW), MD(NW), MI(NW), MN(PNW), MO(NW), MT(CAT1), NE(NW), NV(NW), NM(CAW), NC(CBW), ND(NW), OH(PNW), OK(NW), OR(BDW, Q), PA(NW), SD(NW, RNPS), UT(NW), WA(CCW), WI(NW), WY(NW) L48 (I), AK (I), CAN (I), GL (I), SPM (I)
CIJA2 Cirsium japonicum Fisch. ex DC. Japanese thistle CA(QW)
CIOC2 Cirsium ochrocentrum A. Gray yellowspine thistle CA(AW) L48 (N)
CIUN Cirsium undulatum (Nutt.) Spreng. wavyleaf thistle CA(AW) L48 (N), CAN (N)
CIVU Cirsium vulgare (Savi) Ten. bull thistle CO(BW), MD(NW), MN(PNW), NM(CBW), OR(BDW, Q), PA(NW), WA(CCW) L48 (I), AK (I), HI (I), CAN (I), SPM (I)
CILA8 Cirsium lanceolatum (L.) Scop., non Hill IA(PRNW)
CIREU Citrus reticulata Blanco ssp. unshiu (Marcow.) D.Rivera Núñez et al. Unshu orange SC(PP)
CLOR Clematis orientalis L. Oriental virginsbower CO(BW) L48 (I), CAN (I)
CLVI6 Clematis vitalba L. evergreen clematis OR(BDW, Q), WA(CCW) L48 (I), CAN (I)
CLHIH2 Clidemia hirta (L.) D. Don var. hirta soapbush HI(NW) L48 (N)
CNBE Cnicus benedictus L. blessed thistle SC(PP) L48 (I), CAN (I)
COGR9 Coccinia grandis (L.) Voigt ivy gourd HI(NW) L48 (I), HI (I), VI (I)
COBE2 Commelina benghalensis L. jio NW AL(CAW), CA(Q), FL(NW), MA(P), MN(PNW), NC(CAW), OR(Q), SC(PP), VT(CAW) L48 (I), HI (I), PR (I)
COMA2 Conium maculatum L. poison hemlock CO(CW), ID(NW), IA(SNW), NV(NW), NM(CBW), OH(PNW), OR(BDW, Q), WA(CCW) L48 (I), CAN (I)
COAR4 Convolvulus arvensis L. field bindweed AK(NW), AZ(PNW, RGNW), AR(NW), CA(CW), CO(CW), HI(NW), ID(NW), IA(PRNW), KS(NW), MI(NW), MN(PNW), MO(NW), MT(CAT1), NM(CCW), ND(NW), OR(BDW, Q), SD(RNPS), TX(NP), UT(NW), WA(CCW), WI(NW), WY(NW) L48 (I), HI (I), CAN (I)
COSQ Coronopus squamatus (Forssk.) Asch. greater swinecress AZ(PNW), CA(BW) L48 (I), CAN (I)
COJU2 Cortaderia jubata (Lem.) Stapf purple pampas grass HI(NW) L48 (I), HI (I)
CRHE5 Crassula helmsii A. Berger swamp stonecrop FL(PAP1), NC(CAW), WA(WAWQ)
CROTA Crotalaria L. rattlebox AR(NW)
CRVU2 Crupina vulgaris Cass. common crupina NW AL(CAW), CA(AW, Q), CO(AW), FL(NW), ID(NW), MA(P), MN(PNW), MT(CAT3), NV(NW), NC(CAW), OR(BDW, Q), SC(PP), SD(RNPS), VT(CAW), WA(CAW, NWSPQ) L48 (I)
CUME Cucumis melo L. cantaloupe L48 (I), PR (I), CAN (W)
CUMED Cucumis melo L. var. dudaim (L.) Naud. AZ(PNW), CA(AW)
CUMY Cucumis myriocarpus E. Mey. ex Naud. gooseberry gourd CA(BW) L48 (I)
CUAN4 Cupaniopsis anacardioides (A. Rich.) Radlk. carrotwood FL(NW) L48 (I)
CUSCU Cuscuta L.5, 6 dodder NW AL(CAW), AZ(PNW, RNW), AR(NW), CA(CW, Q), FL(NW), MA(P), MI(NW), MN(PNW), NC(CAW), OR(BDW, Q), SC(PP), SD(RNPS), VT(CAW)
CUAP2 Cuscuta approximata Bab. alfalfa dodder WA(CCW) L48 (I), CAN (I)
CUJA Cuscuta japonica Choisy Japanese dodder TX(NP) L48 (I)
CURE Cuscuta reflexa Roxb. giant dodder CA(AW) L48 (I)
CYRE Cymbopogon refractus (R. Br.) A. Camus barbwire grass HI(NW) HI (I)
CYLO11 Cynanchum louiseae Kartesz & Gandhi Louise's swallow-wort CT(IB), MA(P) L48 (I), CAN (I)
CYNI Cynanchum nigrum (L.) Pers., non Cav. NH(PIS)
VINI3 Vincetoxicum nigrum (L.) Moench VT(CBW)
CYRO8 Cynanchum rossicum (Kleopow) Borhidi European swallow-wort CT(IB), MA(P), NH(PIS) L48 (I), CAN (I)
CYVI3 Cynanchum vincetoxicum (L.) Pers. white swallow-wort L48 (I), CAN (I)
VIHI3 Vincetoxicum hirundinaria Medik. VT(CAW)
CYCA Cynara cardunculus L. cardoon CA(BW) L48 (I)
CYNOD Cynodon Rich. Bermudagrass CA(CW)
CYDA Cynodon dactylon (L.) Pers.7 Bermudagrass AR(NW), UT(NW) L48 (I), HI (I), PR (I), VI (I), CAN (W), SPM (W)
CYOF Cynoglossum officinale L. gypsyflower CO(BW), MT(CAT1), NV(NW), OR(BDW, Q), WA(CBW), WY(NW) L48 (I), CAN (I)
CYES Cyperus esculentus L. yellow nutsedge CA(BW), CO(BW), HI(NW), OR(BDW, Q), WA(CBW, Q) L48 (NI), AK (I), HI (I), PR (I), VI (I), CAN (I)
CYRO Cyperus rotundus L. nutgrass AR(NW), CA(BW), OR(ADW, Q), WA(Q) L48 (I), HI (I), PR (I), VI (I)
CYSC4 Cytisus scoparius (L.) Link Scotch broom CA(CW), HI(NW), ID(NW), OR(BDW, Q), WA(CBW, NWSPQ) L48 (I), HI (I), CAN (I)
CYSCA Cytisus scoparius (L.) Link var. andreanus (Puiss.) Dippel Scotch broom HI(NW) L48 (I)
CYSCS2 Cytisus scoparius (L.) Link var. scoparius Scotch broom HI(NW) L48 (I), HI (I), CAN (I)
CYST7 Cytisus striatus (Hill) Rothm. striated broom OR(BDW, Q) L48 (I)
DAST Datura stramonium L. jimsonweed CT(PIB), PA(NW) L48 (I), HI (I), PR (I), VI (I), CAN (I)
DACA6 Daucus carota L. Queen Anne's lace IA(SNW), MI(NW), OH(PNW), WA(CBW, NWSPQ) L48 (I), PR (I), CAN (I)
DICI2 Dichrostachys cinerea (L.) Wight & Arn. aroma HI(NW) L48 (I)
DINU6 Dichrostachys nutans Benth. HI(NW)
DIAB Digitaria