Magnoliopsida

Magnoliopsida is a valid botanical name for a class of flowering plants. By definition the class will include the family Magnoliaceae, but its circumscription can otherwise vary, being more inclusive or less inclusive depending upon the classification system being discussed.

Magnolia flowers

Cronquist and Takhtajan systems[]

In the Takhtajan system and the Cronquist system the name assd for the group known as dicotyledons.

Magnoliopsida in the Takhtajan system[]

The Takhtajan system used this internal taxonomy:

class Magnoliopsida [= dicotyledons]
subclass Magnoliidae

subclass

subclass

subclass Ranunculidae

subclass Caryophyllidae

subclass Hamamelididae

subclass Dilleniidae

subclass Rosidae

subclass

subclass Asteridae

subclass Lamiidae

Magnoliopsida in the Cronquist system[]

The Cronquist system used this internal taxonomy (in the 1981 version):

class Magnoliopsida [= dicotyledons]
subclass Magnoliidae

subclass Hamamelidae

subclass Caryophyllidae

subclass Dilleniidae

subclass Rosidae

subclass Asteridae

Dahlgren and Thorne systems[]

class Magnoliopsida [= angiosperms]
subclass 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.

APG systems[]

In the APG and APG II systems botanical names are used only at the rank of 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 clades (unranked). This class Magnoliopsida is not defined. The idea that dicotyledons could be a taxonomic unit and get a formal name is rejected by the APG: the dicots are considered to be paraphyletic.