These are distributed into 15 families, or into 12 families if Haloragaceae sensu lato is recognized as a family consisting of Haloragaceae sensu stricto, Penthorum, Tetracarpaea, and Aphanopetalum.
Estas distribúense en 15 familias, ou en 12 familias se Haloragaceae sensu lato é recoñecido coma unha familia  consistindo de Haloragaceae sensu stricto, Penthorum, Tetracarpaea, e Aphanopetalum.