Limnocharis flava is a species of aquatic flowering plant which is native to Mexico, Central America, South America, Cuba, Haiti and the Dominican Republic but widely naturalized in southern and southeastern Asia: India, Sri Lanka, Cambodia, Burma, Thailand, Vietnam, Indonesia, Malaysia, Brunei and southern China .
Limnocharis flava is roughly 50 centimetres (20 in) tall growing in clumps. Its triangular-shaped leaves and hollow stems are glabrous.
Its inflorescences have a very characteristic shape, producing three-lobed yellow flowers about 1.5 cm in diameter.
The fruits are spherical. Although it is not a floating plant, its seeds are carried away by currents.
Traditionally this plant is an important vegetable in parts of Indonesia, the Philippines, Vietnam,Laos, Isan and parts of India, where the central flower stalk and the leaves are used in soups, curries, salads and stir-fries.
The immature flower buds are also eaten.