Ludwigia helminthorrhiza, known commonly as floating Ludwigia,[1] originally known as Jussiaea natans Bonpl.

or Jussiaea helminthorrhiza C. Martius is a herbaceous perennial plant of the family Onagraceae.

Native to south Mexico, Colombia[2] and South America,[3] its habitat includes wet, swampy localities.

Ludwigia helminthorrhiza grows from the water's edge into the water and along the stem and roots develops 1 - 1.2 cm long white rootlets which function as floating bodies to keep the main plant floating on the surface.

The flowers have white petals and oval to almost round shaped leaves.