Ludwigia octovalvis is a species of flowering plant in the Onagraceae family known by the common name Mexican primrose-willow.

[2] Its native distribution is unclear, but can be found in Central America, Australia, South-East Asia, Tamilnadu (IND), the Middle East, the Central-West African regions and spreads easily to become naturalized.

[1] An adult plant is one meter tall on average but is able to grow taller.

[7] It spreads to form mats on the mud, rooting at nodes in contact with the substrate, or floats ascending in the water.

[8] They yield small capsular fruits containing many minute seeds.