Magnoliopsida

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

Cronquist and Takhtajan systems
In the Cronquist and Takhtajan systems, Magnoliopsida was the group of dicotyledons.

Takhtajan system
This is the taxonomy the Takhtajan system used for Magnoliopsida:


 * class Magnoliopsida
 * subclass Magnoliidae
 * subclass Nymphaeidae
 * subclass Nelumbonidae
 * subclass Ranunculidae
 * subclass Caryophyllidae
 * subclass Hamamelididae
 * subclass Dilleniidae
 * subclass Rosidae
 * subclass Cornidae
 * subclass Asteridae
 * subclass Lamiidae

Cronquist system
This is the taxonomy the Cronquist system used for Magnoliopsida:


 * class Magnoliopsida
 * subclass Magnoliidae
 * subclass Hamamelidae
 * subclass Caryophyllidae
 * subclass Dilleniidae
 * subclass Rosidae
 * subclass Asteridae

Dahlgren and Thorne systems
The Dahlgren and Thorne system (1992) treated Magnoliopsida as the angiosperms. However, the Cronquist system was very popular, and there were several versions published. In some of these systems, Magnoliopsida was ranked a class as angiosperms.


 * class Magnoliopsida
 * subclass Magnoliidae
 * subclass Liliidae

Reveal system
The Reveal system used the name, Magnoliopsida for primitive dicotyledons, corresponding to half of the magnoliids.


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

APG systems
In the APG and APG II systems, botanical names are only used as ranks of order or below. Above the rank of order, these systems use their own names, such as angiosperms, eudicots, monocots, rosids, etc. These names are known as clades. The class of Magnoliopsida is not defined in these systems. Note that the idea that dicotyledons may be a taxonomic unit, and get a formal name is rejected by the APG, because the dicots are paraphyletic