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Ludwigia palustris

Common Name: Marsh seedbox, Water purslane, False loosestrife
Family: Onagraceae

Entry Author:  C. Westring
Description:  Aquatic plant primarily off shorelines
Oval shaped to elliptical, approximately 1-2.5 cm long; glabrous; shiny green or reddish
Inconspicuous, stalkless, located in leaf base, 4 greenish outer sepals (1.1-2 mm), no petals
Whitish or yellowish-brown, curved-oblong, 0.5-0.9 mm long
Stem:  Creeping and rooting at the nodes, simply to freely branched; rather succulent
Branching Pattern:
Height:  50 cm
Conditions/Habitat/Kind of Forest:  Shallow water or mud of ponds, lakes, streams, ditches and round springs
Range:  Most of the United States, except the Rocky Mountain area
Conservation Status-US/ World Wide:  Not threatened
Uses (Human):  Used in the treatment of pulmonary tuberculosis, asthma, and chronic coughs


Aquatic and Wetland Vascular Plants of the Northern Great Plains.  February 23, 2005.  Northern Prairie Wildlife Research Center.  Accessed: December 21, 2005.  <>

Floating Mat Rooted Plants.  December 1, 2005.  Washington State Department of Ecology: Water Quality Programs.  Accessed December 21, 2005. <>

Plants for a Future.  June 2004.  Accessed:  December 21, 2005.  <>

This page was created by: C. Westring, Muhlenberg College
Last updated 12/21/05