Botany: 8 genera: Glischrocaryon, Gonocarpus, Haloragis, Haloragodendron, Laurembergia, Meionectes, Myriophyllum, Proserpinaca, Trihaloragis, Vinkia.
English: Watermillfoil family.
Botany: many aquatics; Australia; flowers usually small and inconspicuous, radial, petals usually keeled or hooded when present.
In the Apg3 classification the Haloragaceae are part of the Saxifragales. In the past it had been placed in its own Order.
I have placed it as a separate Order under the presumption it is the Hydrogen series quality of the Malvidae. This is because they are aquatics mostly.