PlantLegitWorks cited
220 official and published sources behind PlantLegit, grouped by topic and by state. Every page also has its own Sources button. Last checked 2026-10-14.
Federal agencies & national data · Extension / university plant data · Toxicity: pets and people · Soil, water and flooding · Companion planting research · New laws 2027+
Federal agencies & national data (8)
- Brennan E.B. (2013). Agronomic aspects of strip intercropping lettuce with alyssum for biological control of aphids. Biological Control 65:302–311 (USDA-ARS Salinas). – USDA Agricultural Research Service
- Climate at a Glance, statewide precipitation time series (1991–2020) – NOAA NCEI
- Flood Map Service Center: official flood-zone lookup by address – FEMA
- HRSA Poison Help – U.S. Health Resources & Services Administration
- Mitchell E.R. et al. (2000). Management of Diamondback Moth in Cabbage Using Collard as a Trap Crop. HortScience 35(5):875 (USDA-ARS). – USDA Agricultural Research Service
- PLANTS Database: plant nativity, soil and wet-soil tolerance profiles (linked per plant on each page) – USDA NRCS
- Tillman P.G. (USDA-ARS). Grain sorghum as a trap crop for southern green stink bug (Nezara viridula) in cotton; Environmental Entomology 35(3):771 (2006). – USDA Agricultural Research Service
- Web Soil Survey: official soil map for your property – USDA NRCS
Extension / university plant data (1)
Toxicity: pets and people (21)
- ASPCA plant entry: American Bittersweet (Celastrus scandens) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Bamboo (Phyllostachys aurea) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Branching Ivy (Hedera helix) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Cardinal Flower (Lobelia cardinalis) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Cherry (Prunus spp.) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Clematis (Clematis spp.) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Flag (Iris species) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Heavenly Bamboo (Nandina domestica) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Hills of Snow (Hydrangea arborescens) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Honey Locust (Gleditsia triacanthos) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Linden (Tilia americana) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Milkweed (Asclepias species) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Red Maple (Acer rubrum) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Rose (Rosa Species) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Russian Olive (elaeagnus species) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Tulip Poplar (Liriodendron tulipifera) – American Society for the Prevention of Cruelty to Animals
- ASPCA plant entry: Wisteria (Wisteria spp.) – American Society for the Prevention of Cruelty to Animals
- Animal Poison Control Center (888) 426-4435 – ASPCA
- Gardener Plant Toolbox – NC State Extension
- Plants toxic and non-toxic to cats – ASPCA Animal Poison Control
- Plants toxic and non-toxic to dogs – ASPCA Animal Poison Control
Soil, water and flooding (6)
- Penn State Extension: Rain Garden Resources
- UConn CT NEMO: Rain Garden Plant Database – UConn Extension CT NEMO
- UMD: Soil to Fill Raised Beds – University of Maryland Extension
- UNH Extension: Native Plants for New England Rain Gardens
- Virginia Cooperative Extension Gardener Handbook, ch. 2
- Virginia Cooperative Extension: Rain Garden Plants (426-043)
Companion planting research (23)
- Abdul-Baki A.A. et al. (1996). Fresh-market Tomato Production in a Low-input Alternative System Using Cover-crop Mulch. HortScience 31(1):65. – American Society for Horticultural Science journals
- Abdul-Baki A.A., Teasdale J.R. (1993). Winter annual legumes and grasses as mulches for fresh-market tomatoes. HortScience 28(5) (USDA-ARS Beltsville). – American Society for Horticultural Science journals
- Ag Alert (Mar 19, 2014), reporting USDA-ARS researcher E. Brennan's decade-long alyssum study. – Ag Alert, California Farm Bureau (news)
- Andow D.A. et al. (1986). Insect Populations on Cabbage Grown with Living Mulches. Environmental Entomology 15(2):293. – Oxford Academic (peer-reviewed journal)
- Ben-Issa R., Gomez L., Gautier H. (2017). Companion Plants for Aphid Pest Management. Insects 8(4):112 (peer-reviewed review). – PubMed Central, U.S. National Library of Medicine
- Berndt L.A. et al. (2002). Effects of buckwheat flowers on leafroller parasitoids in a New Zealand vineyard. Agricultural and Forest Entomology. – Wiley Online Library (peer-reviewed)
- Bomford M.K. (2004). Yield, pest density, and tomato flavor effects of companion planting in garden-scale studies incorporating tomato, basil, and Brussels sprout. West Virginia University dissertation.
- Bomford M.K., Butler L. Do Tomatoes Love Basil But Hate Brussels Sprouts? ASA–CSSA–SSSA meeting abstract (2003). – download.clib.psu.ac.th
- Cornell Cooperative Extension. Investigating the Use of Buckwheat Strips (extension report).
- Evidence of considerable C and N transfer from peas to cereals via direct root contact but not via mycorrhiza. Scientific Reports (2021). – Nature Portfolio (peer-reviewed)
- Gardening with Companion Plants – Washington State University Extension
- Khan Z.R. et al. (2010). Exploiting phytochemicals for developing a push–pull crop protection strategy for cereal farmers in Africa. Journal of Experimental Botany 61(15):4185. – Oxford Academic (peer-reviewed journal)
- Krueger R. et al. Marigolds (Tagetes spp.) for Nematode Management. UF/IFAS Extension ENY-056/NG045.
- Mt.Pleasant J. (2016). Food Yields and Nutrient Analyses of the Three Sisters. Ethnobiology Letters (peer-reviewed). – Journal of Ethnobiology (peer-reviewed)
- Mt.Pleasant J., Burt R.F. (2010). Estimating Productivity of Traditional Iroquoian Cropping Systems. Journal of Ethnobiology 30:52–79. – SAGE Journals (peer-reviewed)
- N2 fixation, N transfer and LER in grain legume–wheat intercropping (2024), PMC open access. – PubMed Central, U.S. National Library of Medicine
- Ohio State University BYGL. Horticultural Horrors II (black walnut and tomatoes).
- Penn State Extension. Allelopathy in the Home Garden.
- Soil Organic Matter, Green Manures, and Cover Crops for Nematode Management. UF/IFAS Extension ENY-059/VH037.
- Theunissen J. et al. (1995). Effects of intercropping white cabbage with clovers on pest infestation and yield. (Wageningen UR record). – research.wur.nl
- UConn IPM. Directions for Using a Perimeter Trap Crop Strategy to Protect Cucurbit Crops. – UConn Extension IPM
- UConn IPM. Perimeter Trap Cropping Works! / Perimeter Trap Cropping for Summer Squash. University of Connecticut Extension. – UConn Extension IPM
- Uvah I.I.I., Coaker T.H. (1984). Effect of mixed cropping on some insect pests of carrots and onions. (FAO AGRIS record). – AGRIS, Food and Agriculture Organization of the UN
New laws 2027+ (1)
By state
Each state lists its official law, agriculture department, environment agency, extension and local government pages. The tag shows the kind of source.
Alabama (2)
Alaska (3)
- 11 AAC 34.020 Prohibited and restricted noxious weeds (LII) – Cornell Law School Legal Information Institute Extension / university
- 11 AAC 34.075 Prohibited acts (LII) – Cornell Law School Legal Information Institute Extension / university
- Alaska Division of Agriculture — noxious weeds State government
Arizona (5)
- Arizona Dept. of Agriculture — Noxious Weeds – Arizona Department of Agriculture Department of Agriculture
- A.A.C. R3-4-245 Noxious Weeds – Cornell Law School Legal Information Institute Extension / university
- Table 4 Class A – Cornell Law School Legal Information Institute Extension / university
- Table 5 Class B – Cornell Law School Legal Information Institute Extension / university
- Table 6 Class C – Cornell Law School Legal Information Institute Extension / university
Arkansas (2)
- 2 CAR part 50 Rules on Plant Diseases and Pests (Arkansas Bureau of Legislative Research, PDF) State law / regulation
- 2 CAR § 50-302 Sale of nursery stock (Code of Arkansas Rules) – Arkansas Code of Rules State law / regulation
California (2)
- CDFA Encycloweedia (weed ratings) – California Department of Food and Agriculture Department of Agriculture
- 3 CCR § 4500 Noxious weed species – Cornell Law School Legal Information Institute Extension / university
Colorado (2)
- Colorado Dept. of Agriculture — Noxious weed species Department of Agriculture
- C.R.S. § 35-5.5-104.5 (sale/cultivation ban) – Colorado Revised Statutes (public.law) State law / regulation
Connecticut (1)
- Conn. Gen. Stat. § 22a-381d (2026 Supplement, ch. 446i) – Connecticut General Assembly State law / regulation
Delaware (2)
- 3 DE Admin. Code 806 Regulations for Invasive Plants – Delaware Administrative Code State government
- 3 Del. C. ch. 29 Invasive plants – Delaware Code State law / regulation
District of Columbia (3)
- DOEE — Invasive plants in the District – DC Department of Energy & Environment Natural resources / environment agency
- D.C. Code § 8-1731.04 Invasive plants and nonindigenous nuisance species – Council of the District of Columbia (DC Code) State law / regulation
- D.C. Code § 8-1731.07 Research permits – Council of the District of Columbia (DC Code) State law / regulation
Florida (2)
- Cornell LII text of 5B-57.007 – Cornell Law School Legal Information Institute Extension / university
- Fla. Admin. Code R. 5B-57.007 Noxious Weed List – Florida Administrative Code State law / regulation
Georgia (2)
- Ga. Comp. R. & Regs. 40-12-4 Noxious weed seeds – Georgia Secretary of State (Rules) State law / regulation
- Ga. Comp. R. & Regs. 40-4-9 Live Plant Regulations – Georgia Secretary of State (Rules) State law / regulation
Hawaii (3)
- HAR ch. 4-68 noxious weed list (LII) – Cornell Law School Legal Information Institute Extension / university
- HAR ch. 4-68 Noxious Weed Rules (HDOA, PDF) – Hawaii Department of Agriculture and Biosecurity State government
- HRS § 152-3 Prohibited acts (Hawaii Legislature) – Hawaii State Legislature State government
Idaho (3)
- IDAPA 02.06.09.220 (LII) – Cornell Law School Legal Information Institute Extension / university
- Invasive Species of Idaho — terrestrial plants – Idaho Invasive Species Council Natural resources / environment agency
- IDAPA 02.06.09 Rules Governing Invasive Species and Noxious Weeds (Idaho DFM, PDF) – Idaho Administrative Code State government
Illinois (3)
- 17 Ill. Adm. Code 1100.30 Official List of Exotic Weeds (IDNR) – Illinois General Assembly State law / regulation
- 8 Ill. Adm. Code 220.60 Noxious weeds (IDOA) – Illinois General Assembly State law / regulation
- Illinois Exotic Weed Act, 525 ILCS 10 (Justia copy) – Justia (state code text) State law / regulation
Indiana (3)
- 312 IAC 18-3-25 (LII) – Cornell Law School Legal Information Institute Extension / university
- Indiana DNR Terrestrial Plant Rule brochure (PDF) – State of Indiana (IN.gov) State government
- Indiana DNR — Terrestrial invasive plants – State of Indiana (IN.gov) State government
Iowa (2)
- Iowa Code ch. 317 Weeds (PDF) – Iowa Legislature State law / regulation
- Iowa Code § 317.1A (Iowa Legislature, 2026 Code, PDF) State law / regulation
Kansas (3)
- KDA — Kansas noxious weed list – Kansas Department of Agriculture Department of Agriculture
- K.A.R. 4-8-44 Designation of noxious weeds (LII) – Cornell Law School Legal Information Institute Extension / university
- K.S.A. 2-1421 Seed law unlawful acts – Kansas Legislature State law / regulation
Kentucky (3)
- KYTC 2026 noxious weed program notice (PDF) – Kentucky Transportation Cabinet State government
- 603 KAR 3:100 (Kentucky LRC) – Kentucky General Assembly State law / regulation
- KRS 176.051 (Kentucky General Assembly) State law / regulation
Louisiana (3)
- LDAF — seed regulations – Louisiana Department of Agriculture and Forestry Department of Agriculture
- La. Admin. Code tit. 7 § XIII-109 (LII) – Cornell Law School Legal Information Institute Extension / university
- La. Admin. Code tit. 76 § VII-1101 Invasive noxious aquatic plants (LII) – Cornell Law School Legal Information Institute Extension / university
Maine (6)
- 01-001 CMR ch. 273 § III (LII) – Cornell Law School Legal Information Institute Extension / university
- Maine DACF handout (PDF, 2024) – Maine Department of Agriculture, Conservation & Forestry State government
- Maine DACF — Do Not Sell invasive plant list – Maine Department of Agriculture, Conservation & Forestry State government
- Maine DEP — invasive aquatic plants – Maine Department of Agriculture, Conservation & Forestry State government
- 38 M.R.S. § 410-N invasive aquatic plants (Maine Legislature) State law / regulation
- 38 M.R.S. § 419-C prohibitions – Maine Legislature State law / regulation
Maryland (3)
- MDA — Maryland Prohibited Invasive Plant Law and Regulations (list updated July 2026) – Maryland Department of Agriculture Department of Agriculture
- COMAR 15.06.04.04 Prohibitions – Code of Maryland Regulations State law / regulation
- COMAR 15.06.04.06 Prohibited plants and Watch List – Code of Maryland Regulations State law / regulation
Massachusetts (1)
- MDAR — Massachusetts Prohibited Plant List State government
Michigan (4)
- MDARD news, May 21, 2026: six species added – Michigan Department of Agriculture & Rural Development (Michigan.gov) State government
- MDARD — Michigan Prohibited and Restricted Weeds (PDF) – Michigan Department of Agriculture & Rural Development (Michigan.gov) State government
- Michigan Invasive Species — State laws and regulations (orders) – Michigan Department of Agriculture & Rural Development (Michigan.gov) State government
- MCL 324.41301 (definitions of prohibited and restricted species) – Michigan Legislature State law / regulation
Minnesota (2)
- MDA — Minnesota Noxious Weed List (official) – Minnesota Department of Agriculture Department of Agriculture
- Minn. Stat. § 18.771 Noxious weed categories – Minnesota Office of the Revisor of Statutes State law / regulation
Mississippi (2)
- MDAC — noxious weeds – Mississippi Department of Agriculture and Commerce Department of Agriculture
- 2 Miss. Code R. 1-3-01-136.01 (LII) – Cornell Law School Legal Information Institute Extension / university
Missouri (4)
- Missouri Dept. of Agriculture — noxious weed list Department of Agriculture
- 2 CSR 70-45 Noxious Weed Rules (Missouri SOS, PDF) – Missouri Secretary of State (CSR) State law / regulation
- RSMo § 263.070 (nursery dealer affidavit; Callery pear, burning bush, Japanese honeysuckle and others) – Missouri Revisor of Statutes State law / regulation
- RSMo § 263.190 (Missouri Revisor) State law / regulation
Montana (6)
- Montana Dept. of Agriculture — noxious weeds – Montana Department of Agriculture Department of Agriculture
- ARM 4.5.206 Priority 1A (LII) – Cornell Law School Legal Information Institute Extension / university
- ARM 4.5.207 Priority 1B (LII) – Cornell Law School Legal Information Institute Extension / university
- ARM 4.5.208 Priority 2A (LII) – Cornell Law School Legal Information Institute Extension / university
- ARM 4.5.209 Priority 2B (LII) – Cornell Law School Legal Information Institute Extension / university
- ARM 4.5.210 Priority 3 (LII) – Cornell Law School Legal Information Institute Extension / university
Nebraska (3)
- 25 NAC 10 Noxious Weed Regulations (NDA, PDF) – Nebraska Department of Agriculture Department of Agriculture
- NDA — noxious weeds – Nebraska Department of Agriculture Department of Agriculture
- 25 NAC 10-001 (LII) – Cornell Law School Legal Information Institute Extension / university
Nevada (3)
- Nevada noxious weed list by category, rev. 11/30/23 (NDA, PDF) – Nevada Department of Agriculture Department of Agriculture
- NAC 555.010 (LII) – Cornell Law School Legal Information Institute Extension / university
- NAC ch. 555 (Nevada Legislature) State law / regulation
New Hampshire (5)
- NH Dept. of Agriculture — invasive plants – New Hampshire Department of Agriculture, Markets & Food Department of Agriculture
- Agr 3802.01 (LII) – Cornell Law School Legal Information Institute Extension / university
- Env-Wq 1300 Exotic aquatic weeds (NH General Court) – New Hampshire General Court (RSA) State law / regulation
- N.H. Admin. R. Agr 3800 Invasive Species (NH General Court) – New Hampshire General Court (RSA) State law / regulation
- RSA 487:16-a – New Hampshire General Court (RSA) State law / regulation
New Jersey (2)
New Mexico (2)
- NMDA — New Mexico noxious weed list memo and list, June 2020 (PDF) – New Mexico Department of Agriculture Extension / university
- NMDA — noxious weeds – New Mexico Department of Agriculture Extension / university
New York (3)
- 6 NYCRR § 575.3 Prohibited invasive species – Cornell Law School Legal Information Institute Extension / university
- NYSDEC Invasive Species Regulations (Part 575, exempt cultivars) – New York State Department of Environmental Conservation Natural resources / environment agency
- NYSDEC printable list (PDF) – New York State Department of Environmental Conservation Natural resources / environment agency
North Carolina (3)
- NCDA&CS Noxious Weeds List – NC Department of Agriculture & Consumer Services Department of Agriculture
- 02 NCAC 48A .1702 Noxious weeds (list) – NC Administrative Code (Office of Administrative Hearings) State law / regulation
- 02 NCAC 48A .1703 Regulated areas / prohibitions – NC Administrative Code (Office of Administrative Hearings) State law / regulation
North Dakota (3)
- NDDA — North Dakota's noxious weed law and regulations (2025, PDF) Department of Agriculture
- NDDA — noxious weeds – North Dakota Department of Agriculture Department of Agriculture
- N.D.C.C. ch. 4.1-47 (Justia) – Justia (state code text) State law / regulation
Ohio (2)
- OAC 901:5-30-01 Invasive plant species – Ohio Laws and Administrative Rules State law / regulation
- OAC 901:5-37-01 Prohibited noxious weeds – Ohio Laws and Administrative Rules State law / regulation
Oklahoma (2)
- Oklahoma Noxious Weed Law, 2 O.S. § 3-220 (ODAFF, PDF) – Oklahoma Department of Agriculture, Food & Forestry Department of Agriculture
- OAC 35:30-25-4 Limitations on noxious weed seeds – Justia Regulations (state rule text) State law / regulation
Oregon (3)
- ODA — Oregon noxious weed list and profiles – Oregon Department of Agriculture State government
- OAR 603-052-1200 (text, oregon.public.law) – Oregon Revised Statutes (public.law) State law / regulation
- OAR 603-052-1200 Quarantine; Noxious Weeds (Oregon SOS) – Oregon Secretary of State (OAR) State law / regulation
Pennsylvania (6)
- PDA — Controlled Plant & Noxious Weed Lists (current additions) – Pennsylvania Department of Agriculture State government
- 3 Pa.C.S. § 1519 Noxious weed list – Pennsylvania General Assembly State law / regulation
- Pa. Bulletin, 52 Pa.B. 3110 (May 28, 2022) — barberry enforcement date and exempt cultivars – Pennsylvania Code & Bulletin State law / regulation
- Pa. Bulletin, 52 Pa.B. 7000 (Nov 12, 2022) — burning bush and privets added – Pennsylvania Code & Bulletin State law / regulation
- Pa. Bulletin, Doc. 21-1239 (Aug 2021) — Japanese barberry added, Class B – Pennsylvania Code & Bulletin State law / regulation
- Pa. Bulletin, Doc. 21-2067 (Dec 11, 2021) — Callery pear added, Class B – Pennsylvania Code & Bulletin State law / regulation
Rhode Island (3)
- DEM proposed rule 250-RICR-60-00-11 (PDF) – Rhode Island Department of Environmental Management Natural resources / environment agency
- P.L. 2026 ch. 208 (H 7071 Sub A) – Rhode Island General Assembly State law / regulation
- R.I. Gen. Laws § 20-1-26 – Rhode Island General Assembly State law / regulation
South Carolina (2)
- Clemson DPI — official State Plant Pest List – Clemson Cooperative Extension Extension / university
- 7 CFR 360.200 – Electronic Code of Federal Regulations (eCFR) State government
South Dakota (2)
- SD DANR — state noxious weed and pest list – South Dakota Department of Agriculture & Natural Resources Department of Agriculture
- ARSD 12:62:03:01 (LII) – Cornell Law School Legal Information Institute Extension / university
Tennessee (3)
- Tenn. Comp. R. & Regs. 0080-06-24-.02 Pest Plant List (LII) – Cornell Law School Legal Information Institute Extension / university
- Tenn. Comp. R. & Regs. ch. 0080-06-24 Pest Plant Regulations (Tennessee Secretary of State, PDF rev. April 2009) State law / regulation
- Tennessee SOS — Department of Agriculture rules index – Tennessee Secretary of State (Rules) State law / regulation
Texas (5)
- TDA figure: 4 TAC § 19.300(a) list (PDF) – Texas Department of Agriculture Department of Agriculture
- TDA — Noxious and Invasive Plants – Texas Department of Agriculture Department of Agriculture
- 4 Tex. Admin. Code § 19.300 (rule text) – Cornell Law School Legal Information Institute Extension / university
- Texas Register 38 TexReg 1386 (Mar. 1, 2013), figure as adopted – Portal to Texas History, University of North Texas Extension / university
- TPWD prohibited exotic aquatic plants – Texas Parks and Wildlife Department Natural resources / environment agency
Utah (3)
- UDAF — State of Utah noxious weed list – Utah Department of Agriculture and Food Department of Agriculture
- Utah Admin. Code R68-9-3 (LII) – Cornell Law School Legal Information Institute Extension / university
- Utah Code title 4 ch. 17 Utah Noxious Weed Act (PDF) – Utah Legislature State government
Vermont (2)
- VAAFM — Quarantine List (effective June 16, 2026) – Vermont Agency of Agriculture, Food & Markets Department of Agriculture
- VAAFM — Regulated Introduced Plant Species – Vermont Agency of Agriculture, Food & Markets Department of Agriculture
Virginia (11)
- VDACS Noxious Weeds program – Virginia Department of Agriculture and Consumer Services Department of Agriculture
- Running bamboo ordinance – Fauquier County, Virginia (local government) Local government
- VA DCR Invasive Plant Species List 2024 – Virginia Department of Conservation and Recreation Natural resources / environment agency
- Bamboo removal and maintenance price list – Austin Bamboo (contractor; used for cost estimates only) State government
- Bamboo services and supplies price list – Beauty and the Bamboo (contractor; used for cost estimates only) State government
- 2VAC5-317 full chapter (prohibitions, permits) – Virginia Legislative Information System State law / regulation
- 2VAC5-317-20 Tier 1/2/3 noxious weeds (VDACS; eff. July 4, 2024) – Virginia Legislative Information System State law / regulation
- Fancher v. Fagella (Va. 2007) – FindLaw case law State law / regulation
- Va. Code § 3.2-3801.1 (effective Jan 1, 2027) — retail signage for 39 invasive species – Virginia Legislative Information System State law / regulation
- Virginia Code § 15.2-901 – Locality removal of grass, weeds and other growth (Virginia Legislative Information System) State law / regulation
- Virginia Code § 15.2-901.1 – Running bamboo control by localities (Virginia Legislative Information System) State law / regulation
Washington (6)
- WAC 16-750 State noxious weed list (control classes) – Washington State Legislature State law / regulation
- WAC 16-750-005 Class A noxious weeds – Washington State Legislature State law / regulation
- WAC 16-750-011 Class B noxious weeds – Washington State Legislature State law / regulation
- WAC 16-750-015 Class C noxious weeds – Washington State Legislature State law / regulation
- WAC 16-752 full chapter (prohibitions) – Washington State Legislature State law / regulation
- WAC 16-752-610 Regulated articles (quarantine list; last amended eff. Feb 7, 2026) – Washington State Legislature State law / regulation
West Virginia (3)
- W. Va. Code R. § 61-14A-5 (LII) – Cornell Law School Legal Information Institute Extension / university
- 61CSR14A Noxious Weeds Rule (WV Secretary of State) – West Virginia Secretary of State (Code of State Rules) State law / regulation
- W. Va. Code § 19-12D-7 – West Virginia Legislature State law / regulation
Wisconsin (3)
- NR 40 invasive plants list (PDF, v2026.04.09) – Wisconsin Department of Natural Resources Natural resources / environment agency
- Wisconsin DNR — Invasive species rule NR 40 – Wisconsin Department of Natural Resources Natural resources / environment agency
- Wisconsin DNR — NR 40 regulated species – Wisconsin Department of Natural Resources Natural resources / environment agency
Wyoming (3)
- Wyoming Dept. of Agriculture — weed & pest – Wyoming Department of Agriculture Department of Agriculture
- Wyoming Weed & Pest Council — designated weed list State government
- W.S. 11-5-102 (FindLaw) – FindLaw (state code text) State law / regulation
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