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Trapa natans L.
water chestnut
Symbol: TRNA
Group: Dicot
Family: Trapaceae
Growth Habit: Forb/herb
Duration: Perennial
U.S. Nativity: Introduced
Click on the image below to enlarge it and download a high-resolution TIFF file.
Click on this Line drawing of Trapa natans (water chestnut) to enlarge it and download a high-resolution TIFF file Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 2: 612. Courtesy of Kentucky Native Plant Society. Scanned by Omnitek Inc. Usage Guidelines.

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Classification Distribution Images Invasive Links More Info Noxious Related Taxa Synonyms Wetland
More Information
About water chestnut

Link to plant Classification report for Trapa natans

Plant source and reference for Trapa natans

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

Trapa natans L.

TRNA

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

MA VT
Delaware
Maryland
Massachusetts
New York
Pennsylvania
Vermont
Virginia

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Massachusetts distribution information Vermont distribution information
Related Taxa:
Trapa natans L.

View 1 genus in Trapaceae, 2 species in Trapa or click below on a thumbnail map or name for variety profiles.

Distribution of Trapa natans var. bispinosa. Cultivated, or not in the U.S. Distribution of Trapa natans var. natans. Cultivated, or not in the U.S.      
Trapa natans var. bispinosa
singhara nut		 Trapa natans var. natans
caltrop		      
Nativity color legend

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Classification:
Trapa natans L.

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 Magnoliopsida – Dicotyledons
                   Subclass Rosidae –
                      Order Myrtales –
                         Family Trapaceae – Water Chestnut family
                            Genus Trapa L. – water chestnut
                               Species Trapa natans L. – water chestnut

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Noxious Weed Information:
Trapa natans L.
This plant and the related entities italicized and indented below are 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.
Alabama:
        water chestnut     Class C noxious weed
Arizona:
        water-chestnut     Prohibited noxious weed
Connecticut:
        water chestnut     Invasive, banned
Florida:
    Trapa L.
        water chestnut     Prohibited aquatic plant, Class 1
Maine:
        water chestnut     Invasive aquatic plant
Massachusetts:
        water chestnut     Noxious weed
North Carolina:
    Trapa L.
        water-chestnut     Class A noxious weed
Oregon:
        European water chestnut     "A" designated weed
        European water chestnut     Quarantine
South Carolina:
        water chestnut     Invasive aquatic plant
        water chestnut, waternut     Plant pest
Vermont:
        water chestnut     Class B noxious weed
Washington:
        water chestnut, bull nut     Wetland and aquatic weed quarantine

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Invasive Information:
Trapa natans L.
        water chestnut
    Trapa L.
        water-chestnut
This plant and the related entity italicized and indented above are 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.
STATE   Assorted authors. 200_. State Noxious Weed Lists for 45 States. State agriculture or natural resource departments.
 

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Introduced Information:
Trapa natans L.
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:
Trapa natans L.
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 OBL NO NO NO NO NO NO NO NO NO NO NO NO

Wetland Data InformationInterpreting wetland indicator status

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Other Species Accounts and Images:
Trapa natans L.

View species account from ARS Germplasm Resources Information Network (GRIN).
View taxonomic account from Integrated Taxonomic Information System (ITIS) for ITIS Taxonomic Serial Number 27170.

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Related Web Sites:
Trapa natans L.

    CT-Invasive Plant Atlas of New England
    Canada-Invasive Exotic Plant Fact Sheets
    Image from Hungary
    MA-Massachusetts Non-Native Plant Introductions
    MD-Department of Natural Resources
    NH-Environmental Fact Sheet
    NY-Invasive Plant Council of New York State-Top 20
    SC-Aquatic Nuisance Species Program
    USGS Nonindigenous Aquatic Species
    VT-Aquatic Nuisance Species
    Vermont Agency of Natural Resources: Aquatic Nuisance Species

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