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Aquatic herbaceous perennial. Forms dense mats. Showy yellow 5-petalled flowers; lance-to egg-shaped alternate leaves up to 3.5 inches long. Fleshy reddish stems float on water.
|Soil and Moisture Conditions
|up to 10 feet deep
|Present in the Willamette River and its tributaries. Also found in Washington, California, eastern and southern US, Mexico, South America, Western Europe, and Australia.
|prevention is the best strategy. This plant may still be sold on the internet for Ponds and aquariums - do not purchase, or if found in your aquarium, do not dump it in another waterbody. Small patches can be removed manually; take care to remove all stem and root fragments.
|Dispose of plants in the garbage in sealed plastic bags.
|Reproduction and Spread
|Mostly spreads through fragmentation and creates new populations as it floats/moves downstream. Can also reproduce via seed.
|This species is native ato parts of the Usas well as Mexico, Central, and South America, but is invasive in Oregon and Washington.
|Native Ludwigia palustris and invasive Ludwigia hexapetala.
|Clogs Waterways, degrades wildlife habitat, negatively impacts water quality and Aquatic recreation.