
Garden flower
Purple lilac
Syringa vulgaris
Purple lilac (Syringa vulgaris) is a shrub in the Oleaceae family, introduced in the lower 48 states, blooming mostly April–June across the U.S.
New Hampshire's official state flower is a big, sweet-smelling shrub that came to North America from the rocky hills of the southern Balkans. Here's what makes it special.
*iNaturalist research-grade observations, as of October 17, 2026. Our state lists also include states where people grow it in gardens, so they can outnumber USDA's wild-plant records. Planted garden flowers are mostly excluded from research grade.
On our lists for: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming
Fun facts
- It has been New Hampshire's official state flower since 1919. N.H. RSA ch. 3
- It belongs to the olive family, Oleaceae. iNaturalist
- In the wild it's native to the southern Balkan Peninsula, where it grows on rocky hills. Wikipedia
- USDA PLANTS lists it as introduced (not native) in the lower 48 states and Canada. Wild-growing lilacs usually turn up near old or current homesteads. USDA PLANTS Wikipedia
- It grows as a large deciduous shrub or a multi-stemmed small tree. Wikipedia
- Between 1876 and 1927, the French nurseryman Victor Lemoine introduced more than 153 named lilac cultivars, and many are still sold today. Wikipedia
- Lilacs tend to flower heavily every other year. Snipping off faded flower clusters before seeds form can even things out. Wikipedia
The purple stripes in New Hampshire's official state tartan stand for the purple finch and the purple lilac, the state bird and state flower. N.H. RSA ch. 3
When does it bloom?
Bloom time in the 46 states whose Bloomipedia list includes it
| State | Type | Peak bloom | Sightings* |
|---|---|---|---|
| Michigan | 🌷 Garden | April–June | 419 |
| New York | 🌷 Garden | April–May | 312 |
| Minnesota | 🌷 Garden | few records (45) | 260 |
| Colorado | 🌷 Garden | April–June | 245 |
| Pennsylvania | 🌷 Garden | April–May | 210 |
| Washington | 🌷 Garden | April–May | 162 |
| Wisconsin | 🌷 Garden | few records (21) | 118 |
| Ohio | 🌷 Garden | few records (38) | 111 |
| Oregon | 🌷 Garden | April–May | 103 |
| Virginia | 🌷 Garden | few records (48) | 97 |
| New Jersey | 🌷 Garden | few records (37) | 96 |
| Maryland | 🌷 Garden | few records (42) | 72 |
| Utah | 🌷 Garden | few records (44) | 68 |
| Missouri | 🌷 Garden | few records (3) | 67 |
| Indiana | 🌷 Garden | few records (30) | 62 |
| Idaho | 🌷 Garden | few records (42) | 59 |
| South Dakota | 🌷 Garden | no flowering records | 53 |
| Vermont | 🌷 Garden | few records (7) | 51 |
| Illinois | 🌷 Garden | few records (10) | 48 |
| Massachusetts | 🌷 Garden | few records (5) | 47 |
| Nebraska | 🌷 Garden | few records (6) | 46 |
| California | 🌷 Garden | few records (18) | 42 |
| Iowa | 🌷 Garden | no flowering records | 36 |
| Kansas | 🌷 Garden | few records (2) | 33 |
| North Carolina | 🌷 Garden | few records (18) | 33 |
| West Virginia | 🌷 Garden | few records (10) | 27 |
| Alaska | 🌷 Garden | few records (14) | 24 |
| Maine | 🌷 Garden | few records (6) | 24 |
| Tennessee | 🌷 Garden | few records (12) | 21 |
| Texas | 🌷 Garden | few records (4) | 18 |
| North Dakota | 🌷 Garden | few records (1) | 15 |
| New Hampshire | 🌷 Garden | few records (2) | 11 |
| Arizona | 🌷 Garden | few records (6) | 9 |
| Alabama | 🌷 Garden | few records (1) | 8 |
| Kentucky | 🌷 Garden | few records (4) | 8 |
| Wyoming | 🌷 Garden | few records (5) | 8 |
| Nevada | 🌷 Garden | few records (2) | 7 |
| Oklahoma | 🌷 Garden | no flowering records | 6 |
| Delaware | 🌷 Garden | few records (1) | 5 |
| Montana | 🌷 Garden | few records (2) | 4 |
| Rhode Island | 🌷 Garden | few records (2) | 4 |
| Arkansas | 🌷 Garden | no flowering records | 2 |
| Georgia | 🌷 Garden | no flowering records | 2 |
| South Carolina | 🌷 Garden | no flowering records | 2 |
| New Mexico | 🌷 Garden | no flowering records | 1 |
| Connecticut | 🌷 Garden | no flowering records | 0 |
Conservation status
- Federal (U.S. ESA)
- Not listed No U.S. Endangered Species Act listing in the USFWS ECOS database. USFWS ECOS
- NatureServe global
- GNR Not yet ranked worldwide. NatureServe
- State rare plant lists
- Not listed Not on the official rare plant list in 30 of our 46 states.
See each state
- Michigan
- Not listed Not on Michigan endangered and threatened plants (Mich. Admin. Code R 299.1028, eff. March 20, 2023). NatureServe: SNA, not applicable (usually because it isn't native there) in Michigan. R 299.1028
- New York
- Not listed Not on New York protected native plants (6 NYCRR § 193.3). NatureServe: SNA, not applicable (usually because it isn't native there) in New York. 6 NYCRR § 193.3
- Minnesota
- Not listed Not on Minnesota endangered, threatened and special concern plants (Minn. R. 6134.0300). NatureServe: SNA, not applicable (usually because it isn't native there) in Minnesota. Minn. R. 6134.0300
- Pennsylvania
- Not listed Not on Pennsylvania classified native plants (17 Pa. Code Ch. 45, Subchapter B, as amended 2023). NatureServe: SNA, not applicable (usually because it isn't native there) in Pennsylvania. 17 Pa. Code Ch. 45
- Wisconsin
- Not listed Not on Wisconsin endangered and threatened species list (Wis. Admin. Code NR 27.03). NatureServe: SNA, not applicable (usually because it isn't native there) in Wisconsin. NR 27.03
- Ohio
- Not listed Not on Ohio endangered and threatened plants (Ohio Adm. Code 1501:18-1-03, eff. Dec. 26, 2024). NatureServe: SNA, not applicable (usually because it isn't native there) in Ohio. OAC 1501:18-1-03
- Oregon
- Not listed Not on Oregon endangered and threatened plants (OAR 603-073-0070). NatureServe has no Oregon rank for it. OAR 603-073-0070
- Virginia
- Not listed Not on Virginia endangered and threatened plant and insect species (2VAC5-320-10). NatureServe: SNA, not applicable (usually because it isn't native there) in Virginia. 2VAC5-320-10
- New Jersey
- Not listed Not on New Jersey Endangered Plant Species List (N.J.A.C. 7:5C-5.1). NatureServe: SNA, not applicable (usually because it isn't native there) in New Jersey. N.J.A.C. 7:5C-5.1
- Maryland
- Not listed Not on Maryland threatened and endangered plants (COMAR 08.03.08.05, .06 and .08). NatureServe: SNA, not applicable (usually because it isn't native there) in Maryland. COMAR 08.03.08
- Missouri
- Not listed Not on Missouri Wildlife Code endangered species (3 CSR 10-4.111), plants. NatureServe: SNA, not applicable (usually because it isn't native there) in Missouri. 3 CSR 10-4.111
- Vermont
- Not listed Not on Endangered and Threatened Plants of Vermont (10 V.S.A. chap. 123; list of Feb 10, 2022). NatureServe: SNA, not applicable (usually because it isn't native there) in Vermont. Vermont E&T list
- Illinois
- Not listed Not on Illinois List of Endangered and Threatened Flora (17 Ill. Adm. Code 1050), per the Endangered Species Protection Board's 2025 checklist. NatureServe: SNA, not applicable (usually because it isn't native there) in Illinois. IL E&T checklist 2025
- Massachusetts
- Not listed Not on Massachusetts Endangered Species Act list (321 CMR 10.90). NatureServe: SNA, not applicable (usually because it isn't native there) in Massachusetts. MESA list
- Nebraska
- Not listed Not on Nebraska threatened and endangered species (163 Neb. Admin. Code ch. 4, § 004). NatureServe has no Nebraska rank for it. 163 NAC 4-004
- California
- Not listed Not on California state-listed endangered, threatened and rare plants (14 CCR § 670.2), per CDFW's CNDDB list (July 2026). NatureServe has no California rank for it. CNDDB listed plants (July 2026)
- Iowa
- Not listed Not on Iowa endangered, threatened and special concern plants (Iowa Admin. Code r. 571-77.3). NatureServe: SNA, not applicable (usually because it isn't native there) in Iowa. IAC 571-77.3
- North Carolina
- Not listed Not on North Carolina Protected Plant Species List (02 NCAC 48F .0301). NatureServe has no North Carolina rank for it. 02 NCAC 48F .0301
- Maine
- Not listed Not on Maine Rare Plant List (Maine Natural Areas Program, 2021). E and T are Maine's official endangered and threatened plants (12 M.R.S.); SC and PE are tracking categories. NatureServe: SNA, not applicable (usually because it isn't native there) in Maine. Maine rare plant list
- Tennessee
- Not listed Not on Tennessee endangered plants (Tenn. Comp. R. & Regs. 0400-06-02-.04, Rare Plant Protection and Conservation Act). NatureServe: SNA, not applicable (usually because it isn't native there) in Tennessee. TN rule 0400-06-02-.04
- Texas
- Not listed Not on Texas endangered and threatened plants (31 Tex. Admin. Code § 69.8), as listed by Texas Parks and Wildlife. NatureServe has no Texas rank for it. 31 TAC 69.8
- New Hampshire
- Not listed Not on New Hampshire Official Rare Plants List (Ncr 312, eff. Jan 1, 2020). NatureServe: SNA, not applicable (usually because it isn't native there) in New Hampshire. NH Ncr 312
- Arizona
- Not listed Not on Arizona Native Plant Law protected plants (Ariz. Admin. Code R3-3 Art. 11, App. A, eff. Feb. 2, 2025). NatureServe has no Arizona rank for it. AAC R3-3 App. A
- Kentucky
- Not listed Not on Kentucky endangered and threatened plant lists (400 KAR 3:040, eff. 2026). NatureServe: SNA, not applicable (usually because it isn't native there) in Kentucky. 400 KAR 3:040
- Nevada
- Not listed Not on Nevada fully protected plants, critically endangered (NAC 527.010). NatureServe has no Nevada rank for it. NAC 527.010
- Delaware
- Not listed Not on Rare and Uncommon Plants of Delaware (DNREC, 2024; informational, Delaware has no state plant-protection list). NatureServe has no Delaware rank for it. DE rare plants 2024
- Rhode Island
- Not listed Not on Rhode Island Rare Plants 2016 (RI Natural History Survey, from the RI Wildlife Action Plan; informational, Rhode Island has no state plant-protection listing law). NatureServe: SNA, not applicable (usually because it isn't native there) in Rhode Island. RI rare plants 2016
- Georgia
- Not listed Not on Georgia protected plants (Ga. Comp. R. & Regs. 391-4-10-.09; a 2026 update is proposed). NatureServe has no Georgia rank for it. Ga. R. 391-4-10-.09
- New Mexico
- Not listed Not on New Mexico state endangered plant species (19.21.2.9 NMAC). NatureServe has no New Mexico rank for it. 19.21.2.9 NMAC
- Connecticut
- Not listed Not on Connecticut Endangered, Threatened and Special Concern Plants (RCSA 26-306; 2015 list). NatureServe: SNA, not applicable (usually because it isn't native there) in Connecticut. CT E/T/SC list
- Colorado
- No list Colorado has no state law listing endangered or threatened plants, so we show NatureServe's Colorado ranks instead. NatureServe: SNA, not applicable (usually because it isn't native there) in Colorado.
- Washington
- No list Washington has no state law listing endangered or threatened plants (the Washington Natural Heritage Program's rare plant list isn't regulatory), so we show NatureServe's Washington ranks instead. NatureServe has no Washington rank for it.
- Utah
- No list Utah has no state law listing endangered or threatened plants, so we show NatureServe's Utah ranks instead. NatureServe: SNA, not applicable (usually because it isn't native there) in Utah.
- Indiana
- No list Indiana has no state law listing endangered or threatened plants (the DNR keeps a rare plant list, but it isn't regulatory), so we show NatureServe's Indiana ranks instead. NatureServe: SNA, not applicable (usually because it isn't native there) in Indiana.
- Idaho
- No list Idaho has no state law listing endangered or threatened plants, so we show NatureServe's Idaho ranks instead. NatureServe has no Idaho rank for it.
- South Dakota
- No list South Dakota's endangered and threatened list (ARSD 41:10:02) covers animals only, so we show NatureServe's South Dakota ranks for plants. NatureServe: SNA, not applicable (usually because it isn't native there) in South Dakota.
- Kansas
- No list Kansas's endangered and threatened list (K.A.R. 115-15-1) covers animals only, so we show NatureServe's Kansas ranks for plants. NatureServe: SNA, not applicable (usually because it isn't native there) in Kansas.
- West Virginia
- No list West Virginia has no state law listing endangered or threatened plants (only federally listed species are protected), so we show NatureServe's West Virginia ranks instead. NatureServe: SNA, not applicable (usually because it isn't native there) in West Virginia.
- Alaska
- No list Alaska has no state law listing endangered or threatened plants, so we show NatureServe's Alaska ranks instead. NatureServe has no Alaska rank for it.
- North Dakota
- No list North Dakota has no state law listing endangered or threatened plants, so we show NatureServe's North Dakota ranks instead. NatureServe has no North Dakota rank for it.
- Alabama
- No list Alabama has no state law listing endangered or threatened plants, so we show NatureServe's Alabama ranks instead. NatureServe has no Alabama rank for it.
- Wyoming
- No list Wyoming has no state law listing endangered or threatened plants, so we show NatureServe's Wyoming ranks instead. NatureServe: SNA, not applicable (usually because it isn't native there) in Wyoming.
- Oklahoma
- No list Oklahoma has no state law listing endangered or threatened plants, so we show NatureServe's Oklahoma ranks instead. NatureServe has no Oklahoma rank for it.
- Montana
- No list Montana has no state law listing endangered or threatened plants, so we show NatureServe's Montana ranks instead. NatureServe has no Montana rank for it.
- Arkansas
- No list Arkansas has no state law listing endangered or threatened plants, so we show NatureServe's Arkansas ranks instead. NatureServe: SNA, not applicable (usually because it isn't native there) in Arkansas.
- South Carolina
- No list South Carolina has no state law listing endangered or threatened plants, so we show NatureServe's South Carolina ranks instead. NatureServe has no South Carolina rank for it.
- Rare elsewhere
- No other U.S. state ranks it S1, S2, SH or SX.
Checked October 17, 2026. Rankings and lists can change, so follow the links for the latest.
Can you eat it?
NC State Extension says the flowers can be eaten raw or dipped in batter and fried as fritters. NC State Extension
We couldn't find a lilac (Syringa vulgaris) entry in the ASPCA plant database, so we can't say for sure.
🌿 Never eat a wild plant unless you're certain of its ID; this isn't medical advice. Worried about a person? Call Poison Control at 1-800-222-1222. Worried about a pet? Call your vet.
Where does it grow?
USDA PLANTS records purple lilac in 30 states plus Washington, D.C.
recorded by USDA PLANTS on our state lists not recorded
See the full list of states
Arkansas, Colorado, Connecticut, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oregon, Pennsylvania, Rhode Island, South Dakota, Tennessee, Utah, Vermont, Virginia, West Virginia, Wisconsin; District of Columbia.
Michigan counties with USDA records: Alcona, Alpena, Benzie, Berrien, Charlevoix, Cheboygan, Clinton, Crawford, Delta, Gratiot, Isabella, Kalamazoo, Keweenaw, Leelanau, Livingston, Luce, Mackinac, Macomb, Marquette, Ogemaw, Osceola, Ottawa, Presque Isle, Schoolcraft, Washtenaw, Wayne.
New York counties with USDA records: Albany, Clinton, Dutchess, Jefferson, Onondaga, Orange, Richmond, Rockland, Suffolk, Ulster, Warren.
Minnesota counties with USDA records: Anoka, Becker, Blue Earth, Cook, Isanti, Kittson, Pope, Waseca.
Growing conditions
USDA PLANTS gives Purple lilac a medium shade tolerance, medium drought tolerance and medium moisture use. It is rated for soil pH 5.8 to 7.8 and winter lows down to -38 °F.
- Shade tolerance
- Medium
- Drought tolerance
- Medium
- Moisture use
- Medium
- Soil textures it is adapted to
- coarse, medium, fine
- Soil pH range
- 5.8 to 7.8
- Minimum temperature tolerated
- -38 °F
- Frost-free days needed (minimum)
- 110
- Annual precipitation range
- 30 to 50 inches
- Minimum root depth
- 14 inches
- Salinity tolerance
- Medium
- Fertility requirement
- Medium
- Growth rate
- Moderate
- Lifespan
- Moderate
- Active growth period
- Spring and Summer
- Fruit or seed
- Brown · Summer to Summer
- Can be propagated by
- bare root, container, seed
- Commercial availability
- Routinely Available
From the USDA PLANTS characteristics data for SYVU. USDA ratings are general guidance for the species, not a guarantee for your garden.
Names, range and relatives
Native status by region (USDA PLANTS): Canada: Introduced; Lower 48 states: Introduced.
County records: USDA PLANTS lists it in 166 counties across 23 states; the most are in Michigan (26), Pennsylvania (23), Wisconsin (18).
Other Syringa on Bloomipedia (3): Japanese tree lilac, Meyer lilac, Hairy lilac.
More from the Oleaceae family (9 on Bloomipedia; most observed first): Downy forestiera, White fringetree, Spiny menodora, Border forsythia, Sweet olive, Chinese fringetree.
More Michigan flowers
Sources
- USDA, NRCS. PLANTS Database, profile SYVU.
- iNaturalist, Syringa vulgaris: taxonomy, research-grade observation counts and “Flowering” annotations, retrieved October 17, 2026.
- Wikipedia, Syringa vulgaris (facts restated in our own words).
- N.H. RSA 3:5: New Hampshire state flower.
- State rare and invasive plant lists (74):
Show all 74 state lists
- Michigan: Michigan endangered and threatened plants (Mich. Admin. Code R 299.1028, eff. March 20, 2023).
- Michigan: Michigan prohibited and restricted species (NREPA Part 413 and the 2026 Invasive Species Order), as listed by Michigan's Invasive Species Program.
- New York: New York protected native plants (6 NYCRR § 193.3).
- New York: New York prohibited and regulated invasive species (6 NYCRR Part 575).
- Minnesota: Minnesota endangered, threatened and special concern plants (Minn. R. 6134.0300).
- Minnesota: Minnesota Noxious Weed List (Minn. Stat. § 18.79; Minnesota Department of Agriculture, updated January 2026).
- Colorado: Colorado noxious weed lists A, B and C (8 CCR 1206-2, eff. May 15, 2025).
- Pennsylvania: Pennsylvania classified native plants (17 Pa. Code Ch. 45, Subchapter B, as amended 2023).
- Pennsylvania: Pennsylvania Noxious Weed List (3 Pa.C.S. § 1519, PA Dept. of Agriculture) (PDA's page spells garlic mustard “Allaria petiolata”; we match it as Alliaria petiolata).
- Washington: Washington State noxious weed list (WAC 16-750-005, -011, -015).
- Wisconsin: Wisconsin endangered and threatened species list (Wis. Admin. Code NR 27.03).
- Wisconsin: Wisconsin invasive species rule (Wis. Admin. Code NR 40.04 prohibited, NR 40.05 restricted).
- Ohio: Ohio endangered and threatened plants (Ohio Adm. Code 1501:18-1-03, eff. Dec. 26, 2024).
- Ohio: Ohio invasive plant species (Ohio Adm. Code 901:5-30-01).
- Oregon: Oregon endangered and threatened plants (OAR 603-073-0070).
- Oregon: Oregon noxious weed quarantine, A and B weeds (OAR 603-052-1200).
- Virginia: Virginia endangered and threatened plant and insect species (2VAC5-320-10).
- Virginia: Virginia noxious weeds (2VAC5-317-20, Tier 1, 2 and 3).
- New Jersey: New Jersey Endangered Plant Species List (N.J.A.C. 7:5C-5.1).
- New Jersey: New Jersey prohibited invasive plant species (Invasive Species Management Act; propagation banned from Jan 1, 2027, sale from Jan 1, 2030).
- Maryland: Maryland threatened and endangered plants (COMAR 08.03.08.05, .06 and .08).
- Maryland: Maryland Prohibited Invasive Plant List (COMAR 15.06.04.06; MDA, updated July 2026).
- Utah: Utah noxious weed list (Utah Admin. Code R68-9-3).
- Missouri: Missouri Wildlife Code endangered species (3 CSR 10-4.111), plants.
- Missouri: Missouri noxious weed list (2 CSR 70-45.005).
- Indiana: Indiana prohibited invasive terrestrial plants (312 IAC 18-3-25).
- Idaho: Idaho noxious weeds (IDAPA 02.06.09, Section 220).
- South Dakota: South Dakota statewide noxious weeds (ARSD 12:62:03:01.06).
- Vermont: Endangered and Threatened Plants of Vermont (10 V.S.A. chap. 123; list of Feb 10, 2022).
- Vermont: Vermont Quarantine List, Regulated Introduced Plant Species Rule (eff. June 16, 2026).
- Illinois: Illinois List of Endangered and Threatened Flora (17 Ill. Adm. Code 1050), per the Endangered Species Protection Board's 2025 checklist.
- Illinois: Illinois Official List of Exotic Weeds (17 Ill. Adm. Code 1100.30, Illinois Exotic Weed Act).
- Massachusetts: Massachusetts Endangered Species Act list (321 CMR 10.90).
- Massachusetts: Massachusetts Prohibited Plant List (MDAR) (Text from MDAR's 2023 scientific-name PDF (mass.gov blocks automated downloads); 2024-2026 additions listed on the mass.gov page: Alnus glutinosa, Pyrus calleryana, Miscanthus sinensis, Aralia elata, Rhodotypos scandens, Symplocos paniculata.).
- Nebraska: Nebraska threatened and endangered species (163 Neb. Admin. Code ch. 4, § 004).
- Nebraska: Nebraska noxious weeds (25 Neb. Admin. Code ch. 10, § 001.02).
- California: California state-listed endangered, threatened and rare plants (14 CCR § 670.2), per CDFW's CNDDB list (July 2026).
- California: California noxious weed species (3 CCR § 4500).
- Iowa: Iowa endangered, threatened and special concern plants (Iowa Admin. Code r. 571-77.3).
- Iowa: Iowa noxious weeds (Iowa Code § 317.1A).
- Kansas: Kansas noxious weeds (K.A.R. 4-8-44, as amended 2026).
- North Carolina: North Carolina Protected Plant Species List (02 NCAC 48F .0301).
- North Carolina: North Carolina Noxious Weed List (02 NCAC 48A .1702) (the list names any non-native Lythrum; we apply it to purple loosestrife (Lythrum salicaria), which isn't native).
- West Virginia: West Virginia noxious weeds (W. Va. Code R. § 61-14A-5) (the rule abbreviates some names (e.g. “P. cuspidatum”); we expand them to match).
- Alaska: Alaska prohibited and restricted noxious weeds (11 AAC 34.020).
- Maine: Maine Rare Plant List (Maine Natural Areas Program, 2021). E and T are Maine's official endangered and threatened plants (12 M.R.S.); SC and PE are tracking categories.
- Maine: Maine Do Not Sell invasive plant list (01-001 C.M.R. ch. 273).
- Tennessee: Tennessee endangered plants (Tenn. Comp. R. & Regs. 0400-06-02-.04, Rare Plant Protection and Conservation Act).
- Tennessee: Tennessee Pest Plant List (Tenn. Comp. R. & Regs. 0080-06-24-.02).
- Texas: Texas endangered and threatened plants (31 Tex. Admin. Code § 69.8), as listed by Texas Parks and Wildlife.
- Texas: Texas noxious and invasive plant list (4 Tex. Admin. Code § 19.300(a)).
- North Dakota: North Dakota state noxious weeds (N.D. Admin. Code 7-06-01-02), as listed by the ND Department of Agriculture.
- New Hampshire: New Hampshire Official Rare Plants List (Ncr 312, eff. Jan 1, 2020).
- New Hampshire: NH Prohibited Invasive Species List (Agr 3800, Table 3800.1).
- Arizona: Arizona Native Plant Law protected plants (Ariz. Admin. Code R3-3 Art. 11, App. A, eff. Feb. 2, 2025).
- Arizona: Arizona prohibited noxious weeds (Ariz. Admin. Code R3-4-245).
- Alabama: Alabama noxious weeds (Ala. Admin. Code r. 80-10-14-.04).
- Kentucky: Kentucky endangered and threatened plant lists (400 KAR 3:040, eff. 2026).
- Kentucky: Kentucky noxious weeds and invasive plants on state rights-of-way (KRS 176.051; species list from the Kentucky Transportation Cabinet).
- Wyoming: Wyoming state designated noxious weeds (W.S. 11-5-102(a)(xi)), as listed by the Wyoming Weed & Pest Council.
- Nevada: Nevada fully protected plants, critically endangered (NAC 527.010).
- Nevada: Nevada noxious weeds (NAC 555.010).
- Oklahoma: Oklahoma Noxious Weed Law (2 O.S. § 3-220).
- Delaware: Rare and Uncommon Plants of Delaware (DNREC, 2024; informational, Delaware has no state plant-protection list).
- Delaware: Delaware Invasive Plant List (3 Del. Admin. Code § 806-3.0).
- Montana: Montana noxious weed list (Admin. R. Mont. 4.5.206–4.5.210).
- Rhode Island: Rhode Island Rare Plants 2016 (RI Natural History Survey, from the RI Wildlife Action Plan; informational, Rhode Island has no state plant-protection listing law).
- Arkansas: Arkansas State Plant Board noxious weeds and prohibited plants (2 CAR § 50-101).
- Georgia: Georgia protected plants (Ga. Comp. R. & Regs. 391-4-10-.09; a 2026 update is proposed).
- South Carolina: South Carolina State Plant Pest List, plants (S.C. Code Regs. 27-135; Clemson Dept. of Plant Industry).
- New Mexico: New Mexico state endangered plant species (19.21.2.9 NMAC).
- New Mexico: New Mexico Noxious Weed List (NM Department of Agriculture, updated June 2020).
- Connecticut: Connecticut Endangered, Threatened and Special Concern Plants (RCSA 26-306; 2015 list).
- Connecticut: Connecticut prohibited invasive plants (Conn. Gen. Stat. § 22a-381d).
- USFWS, ECOS species database (ESA listing check), October 17, 2026.
- NatureServe Explorer, Syringa vulgaris (global and state ranks).
- Edibility and toxicity: NC State Extension.
- Photo: Jared Shorma via iNaturalist · CC BY 4.0 · resized.


