Limnobium

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.

Limnobium dubium (Blume) Shäffer-Fehre - Hydrocharis dubia (Blume) Backer