Ludwigia is a genus of flowering plants in the family Onagraceae, commonly found in wetlands and along water bodies. This genus includes both aquatic and terrestrial species, characterized by their elongated leaves and bright yellow or red flowers. Ludwigia is often used in aquariums and garden ponds due to its aesthetic appeal and ability to improve water quality. Many species of Ludwigia are native to North America, South America, and parts of Asia. Some popular species include Ludwigia repens and Ludwigia palustris. These plants can provide habitat for aquatic wildlife and help stabilize shorelines, making them valuable for ecological health.