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Monochoria (weeds) C. Presl, 1827
The genus contains 7 species of aquatic plants which are found in tropical and subtropical parts of Asia, Australia and Africa. They grow in shallow water or muddy soil (marshes) and are sometimes planted as ornamentals or eaten as vegetables.
Several species have become established outside their native range. For example, Monochoria vaginalis is an introduced plant in California and some Pacific islands. It is regarded as a weed of rice fields not only in the introduced areas, but also in parts of its native Asia.
Currently, the following species have been entered into the system: