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Hydrilla verticillata (L. f.) Royle
waterthyme
Symbol: HYVE3
Group: Monocot
Family: Hydrocharitaceae
Growth Habit: Forb/herb
Duration: Perennial
U.S. Nativity: Introduced

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Classification Distribution Images Invasive Links More Info Noxious Related Taxa Synonyms Wetland
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About waterthyme

Link to plant Classification report for Hydrilla verticillata

Plant source and reference for Hydrilla verticillata

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State Distributional Map for HYVE3
© Image generated using gd 1.8
Plant Distribution by State

Hydrilla verticillata (L. f.) Royle

HYVE3

See county distributions for the following states by clicking on them below or on the map.

CA FL* GA
TN* VA
* Offsite source.
Alabama
Arizona
California
Connecticut
Delaware
Florida
Georgia
Louisiana
Maryland
Mississippi
North Carolina
South Carolina
Tennessee
Texas
Virginia
Washington

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Virginia distribution information California distribution information Tennessee distribution information linked offsite at Univerity of Tennessee Herbarium Florida distribution information linked offsite at USF Atlas of Florida Vascular Plants Georgia distribution information
Related Taxa:
Hydrilla verticillata (L. f.) Royle

View 14 genera in Hydrocharitaceae, 1 species in Hydrilla

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Classification:
Hydrilla verticillata (L. f.) Royle

Click on a scientific name below to expand it in the PLANTS Classification Report.
   
    Kingdom Plantae – Plants
       Subkingdom Tracheobionta – Vascular plants
          Superdivision Spermatophyta – Seed plants
             Division Magnoliophyta – Flowering plants
                Class Liliopsida – Monocotyledons
                   Subclass Alismatidae –
                      Order Hydrocharitales –
                         Family Hydrocharitaceae – Tape-grass family
                            Genus Hydrilla L.C. Rich. – hydrilla
                               Species Hydrilla verticillata (L. f.) Royle – waterthyme

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Noxious Weed Information:
Hydrilla verticillata (L. f.) Royle
This plant is listed by the U. S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location.
United States:
        hydrilla     Noxious weed
Alabama:
        hydrilla     Class A noxious weed
Arizona:
        hydrilla, Florida-elodea     Prohibited noxious weed
California:
        hydrilla     A list (noxious weeds)
        hydrilla     Noxious aquatic weed
        hydrilla     Quarantine
Colorado:
        hydrilla     Noxious weed
Connecticut:
        hydrilla     Invasive, banned
Florida:
        hydrilla, Florida elodea     Prohibited aquatic plant, Class 1
Maine:
        hydrilla     Invasive aquatic plant
Massachusetts:
        hydrilla     Noxious weed
Mississippi:
        hydrilla     Noxious weed
Nevada:
        hydrilla     Noxious weed
New Mexico:
        hydrilla     Class A noxious weed
North Carolina:
        waterthyme     Class A noxious weed
Oregon:
        hydrilla     "A" designated weed
        hydrilla     Quarantine
South Carolina:
        hydrilla     Invasive aquatic plant
        hydrilla     Plant pest
Texas:
        hydrilla     Noxious plant
Vermont:
        hydrilla     Class A noxious weed
Washington:
        hydrilla     Class A noxious weed
        hydrilla     Wetland and aquatic weed quarantine

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Invasive Information:
Hydrilla verticillata (L. f.) Royle
        hydrilla
        water thyme
        Florida elodea
This plant is considered invasive by the authoritative sources noted below. This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each invasive plant list, or click here for a composite list of Invasive Plants of the U.S.
US   Plant Protection and Quarantine. 2002. Federal Noxious Weed List (http://www.aphis.usda.gov/ppq/bats/noxweed.html, October 20, 2003). USDA Animal and Plant Health Inspection Service. Washington, DC. 2pp.
 
STATE   Assorted authors. 200_. State Noxious Weed Lists for 45 States. State agriculture or natural resource departments.
 
CalEPPC   California Exotic Pest Plant Council. 1999. Exotic Plant Pest List (http://www.cal-ipc.org/1999_cal-ipc_list/, October 19, 1999). California Exotic Pest Plant Council. California.
 
FLEPPC   Florida Exotic Pest Plant Council. 1999. Invasive Plant List (http://www.fleppc.org/, October 19, 1999). Florida Exotic Pest Plant Council. Florida.
 
SEEPPC   Southeast Exotic Pest Plant Council. 1996. Invasive Exotic Pest Plants in Tennessee (http://www.se-eppc.org/states/TN/TNIList.html, October 19, 1999). Research Committee of the Tennessee Exotic Pest Plant Council. Tennessee.
 

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Introduced Information:
Hydrilla verticillata (L. f.) Royle
This plant is introduced to the United States from another country or countries. Click on link below for a partial or complete list of U.S. introduced plants.

List of Invasive PlantsScientific Name = A| B| C| D| E| F| G| H| I| J| K| L| M| N| O| P| Q| R| S| T| U| V| W| X| Y| Z| all
List of Invasive PlantsCommon Name = A| B| C| D| E| F| G| H| I| J| K| L| M| N| O| P| Q| R| S| T| U| V| W| X| Y| Z| all
Note: The complete introduced plant report is 1.4 MB. Download and display times may take 3 to 12 minutes depending on your internet connection, internet traffic, your computer and browser. It may appear your computer has locked up. Task manager may report that Netscape is 'Not Responding'. Typically, Netscape is formatting the report for display, and if you are patient, the final report will appear.

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Wetland Indicator Status:
Hydrilla verticillata (L. f.) Royle
Nat. Ind. Reg. 1 Reg. 2 Reg. 3 Reg. 4 Reg. 5 Reg. 6 Reg. 7 Reg. 8 Reg. 9 Reg. 0 Reg. A Reg. C Reg. H
OBL NO OBL NO NO NO OBL NO NO NO NO NO NO OBL

Wetland Data InformationInterpreting wetland indicator status

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Other Species Accounts and Images:
Hydrilla verticillata (L. f.) Royle

View species account and distribution map from Flora of North America (FNA).
View species account from USF Atlas of Florida Vascular Plants.
View species account from ARS Germplasm Resources Information Network (GRIN).
View taxonomic account from Integrated Taxonomic Information System (ITIS) for ITIS Taxonomic Serial Number 38974.
View photographs from University of Tennessee Herbarium.

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Related Web Sites:
Hydrilla verticillata (L. f.) Royle

    ABI-America's Least Wanted
    Aquatic, Wetland and Invasive Plant Info. System: abstract & image
    Aquatic, Wetland and Invasive Plant Info. System: abstract & image
    CT-Invasive Plant Atlas of New England
    Cooperative Agriculture Pest Survey & NAPIS Page
    FL-Florida Exotic Pest Plant Council
    Hawaiian Ecosystems at Risk: Plant Threats to Pacific Ecosystems
    NC-Aquatic Weed Fact Sheet (NCSU)
    TNC Weeds on the Web
    TX-Biological Control of Weeds in Texas (TAMU)
    TX-Submerged Plants (TAES)
    USGS Nonindigenous Aquatic Species
    VA-Invasive Alien Plant Species of Virginia
    WA-King County Noxious Weeds
    WA-NonNative Freshwater Plants
    Western Aquatic Plant Management Society

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