Cabombaceae - fanworts
Nymphaeaceae - water lilies

The Nymphaeales are an order of flowering plants, including two families of aquatic herbs:

• Family Nymphaeaceae (waterlily family)
• Family Cabombaceae (fanwort family)

Sometimes the Cabombaceae are included within the Nymphaeaceae. The older Cronquist system also included the following familes:

• Family Nelumbonaceae
• Family Barclayaceae
• Family Ceratophyllaceae

The Nymphaeales, taken in the narrower sense, appear to have diverged from the other flowers very early on, representing a basal clade offshoot to the flowering plants.