TaxonomyThe classification of
Ceratophyllales has long been problematic. The family has been placed near
Magnoliidae or
Monocots. In the
Apg3 classification Ceratophyllales is been placed at the beginning of the Dicotylodons or Eudicotyledons. Eudicotyledons are the
Fabanae,
Malvanae and
Asteranae. They are all the
Angiospermae without the
Amborellanae,
Magnolianae and
Lilianae.
Ceratophyllales was considered relative of
Nymphaeaceae and included in Nymphaeales in the Cronquist system.
In the
Plant theory the
Ceratophyllidae are a Subclass of the
Fabanae. They have the emphasis on the
Hydrogen series.
Ceratophyllidae is a new name used to notify that it is a Subclass of the
Fabanae in the
Plant theory.
The
Ceratophyllidae have one Order,
Ceratophyllales and one
Family,
Ceratophyllaceae.