It is native to
Colombia,
Venezuela, and every US state along the coast from
Massachusetts to
Louisiana. It has also been reported as naturalized in
Great Britain on just three occasions; only one of these is recent and it appears to have become extinct by 2010. It is also recorded as a non-native on the
Azores, and on the Island of
Java in
Indonesia. It grows primarily in shallow
brackish water along the seacoast, in marshes,
estuaries, etc. ==Conservation==