Arecidae
# Arecidae

Arecidae is a botanical name at the rank of subclass. Circumscription of the subclass will vary with the taxonomic system being used (there are many such systems); the only requirement being that it includes the family Arecaceae.

## Arecidae in the Takhtajan system

The Takhtajan system used this name for a subclass in the class Liliopsida (=monocotyledons).

* subclass Arecidae

    superorder Arecanae
       order Arecales
          family Arecaceae (or Palmae)
       order Cyclanthales
          family Cyclanthaceae
       order Arales
          family Araceae
          family Lemnaceae
       order Pandanales
          family Pandanaceae
       order Typhales
          family Sparganiaceae
          family Typhaceae

## Arecidae in the Cronquist system

The Cronquist system (1981) used this name for a subclass in the class Liliopsida (=monocotyledons), with the circumscription:

* subclass Arecidae

    order Arecales
       family Arecaceae (or Palmae)
    order Cyclanthales
       family Cyclanthaceae
    order Pandanales
       family Pandanaceae
    order Arales
       family Acoraceae
       family Araceae
       family Lemnaceae

## APG II system

The APG II system does not use formal botanical names above the rank of order; it assigns the plants included in this subclass by Cronquist in various taxa throughout the clade monocots. In other words, by today's standards Cronquist's subclass was not a "good" group.

