Editing Magnoliopsida (section)

== Classification ==
===Cronquist and Takhtajan systems===
In the [[Takhtajan system]] and the [[Cronquist system]], the name was used for the group known as [[dicotyledons]].

The Takhtajan system used this internal taxonomy:

* class Magnoliopsida (= dicotyledons)
** subclass [[Magnoliids|Magnoliidae]]
** subclass [[Nymphaeidae]]
** subclass [[Nelumbonidae]]
** subclass [[Ranunculidae]]
** subclass [[Caryophyllidae]]
** subclass [[Hamamelididae]]
** subclass [[Dilleniidae]]
** subclass [[Rosidae]]
** subclass [[Cornidae]]
** subclass [[Asteridae]]
** subclass [[Lamiidae]]

The Cronquist system used this internal taxonomy (in the 1981 version):
* class Magnoliopsida (= dicotyledons)
** subclass [[Magnoliids|Magnoliidae]]
** subclass [[Hamamelidae]]
** subclass [[Caryophyllidae]]
** subclass [[Dilleniidae]]
** subclass [[Rosidae]]
** subclass [[Asteridae]]

The Cronquist system has been very popular, and there have been many versions of the system published. In some of these Cronquist-based systems the name Magnoliopsida (at the rank of class) refers to the [[flowering plant]]s (angiosperms).

===Dahlgren and Thorne systems===
The [[Dahlgren system]] and the [[Thorne system]] (1992) used the name Magnoliopsida for the flowering plants.

* class Magnoliopsida (= angiosperms)
** subclass [[Magnoliids|Magnoliidae]] (= dicotyledons)
** subclass [[Liliidae]] (= monocotyledons)

=== Reveal system ===
The [[Reveal system]] used the name Magnoliopsida for a group of the primitive dicotyledons, corresponding to about half of the plants in the [[magnoliids]]:

* class 1. Magnoliopsida
** superorder 1. [[Magnolianae]]
** superorder 2. [[Lauranae]]

===APG systems===
In the [[APG system|APG]] and [[APG II system]]s, botanical names are used only at the [[rank (botany)|rank]] of [[order (biology)|order]] and below. Above the rank of order, these systems use their own names, such as [[angiosperms]], [[eudicots]], [[monocots]], [[rosids]], etc. These names refer to [[clade]]s (unranked). The class Magnoliopsida is not defined. The idea that dicotyledons are a taxonomic unit and require a formal name is rejected by the APG: the dicots are considered to be [[paraphyletic]].