An official website of the United States government.

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Water Chestnut

Scientific Name

Trapa natans L. (ITIS)

Common Name

Water chestnut, water nut, water caltrop

Native To

Eurasia and Africa (Hummel and Kiviat 2004)

Date of U.S. Introduction
Means of Introduction

Forms dense mats that displace native species and interfere with recreational activities (Hummel and Kiviat 2004)

Water chestnut
Image use policy

Water chestnut, flowers


Photo by Leslie J. Mehrhoff; University of Connecticut

Find more images

Distribution / Maps / Survey Status


Selected Resources

The section below contains highly relevant resources for this species, organized by source.

Council or Task Force
Federal Government
International Government
State and Local Government