Lathyrus palustris is a plant species also known by several synonyms such as marsh pea, marsh vetchling, and bog pea. This herbaceous perennial plant grows in wetlands, marshes, and shallow water bodies. Its leaves are pinnate with oblong leaflets, and it produces pinkish-purple flowers that bloom from May to August. Lathyrus palustris is recognized for its medicinal properties and has been used in traditional medicine to treat coughs, wounds, and fever. It is also a popular ornamental plant in gardens and parks due to its beautiful flowers. With all its synonyms, this plant is a fascinating addition to the flora of wetland habitats.