Synonyms: Ammannia catholica (heterotypic); Ammannia catholica var. brasiliensis; Ammannia friesii; Ammannia hastata; Ammannia koehnei; Ammannia koehnei exauriculata; Ammannia koehnei var. exauriculata; Ammannia lingulata; Ammannia lythrifolia; Ammannia octandra (heterotypic); Ammannia pallida; Ammannia robusta; Ammannia sagittata; Ammannia sanguinolenta (heterotypic); Ammannia sanguinolenta longifolia; Ammannia sanguinolenta robusta; Ammannia teres var. exauriculata; Isnardia subhastata; Jussiaea sagittata; Ludwigia hastata