Genus
Limnobium
Limnobium laevigatum. Photo: (c) marcosserenal, some rights reserved (CC BY-NC)
Limnobium, common names spongeplant and American frogbit, is a group of aquatic plants in the Hydrocharitaceae described as a genus in 1814. It is widespread in freshwater environments in Latin America, the West Indies, and the United States.