# Liliopsida

Liliopsida Batsch (synonym: Liliatae) is a botanical name for the class containing the family Liliaceae (or Lily Family). It is considered synonymous (or nearly synonymous) with the name monocotyledon. Publication of the name is credited to Scopoli (in 1760): see author citation (botany). This name is formed by replacing the termination -aceae in the name Liliaceae by the termination -opsida (Art 16 of the ICBN).
Although in principle it is true that circumscription of this class will vary with the taxonomic system being used, in practice this name is very strongly linked to the Cronquist system, and the allied Takhtajan system. These two are the only major systems to use the name, and in both these systems it refers to the group more widely known as the monocotyledons. Earlier systems referred to this group by the name Monocotyledones, with Monocotyledoneae an earlier spelling (these names may be used in any rank). Systems such as the Dahlgren and Thorne systems (more recent than the Takhtajan and Cronquist systems) refer to this group by the name Liliidae (a name in the rank of subclass). Modern systems, such as the APG and APG II systems refer to this group by the name monocots (a name for a clade). Therefore, in practice the name Liliopsida will almost surely refer to the usage as in the Cronquist system.
In summary the monocotyledons were named:
* Monocotyledoneae in the de Candolle system and the Engler system.
* Monocotyledones in the Bentham & Hooker system and the Wettstein system
* class Liliatae and later Liliopsida in the Takhtajan
* class Liliopsida in the Cronquist system (also in the Reveal system).
* subclass Liliidae in the Dahlgren system and the Thorne system (1992)
* clade monocots in the APG system, the APG II system and the APG III system.
Each of the systems mentioned above use their own internal taxonomy for the group.

## Liliopsida in the Takhtajan system

The Takhtajan system used this internal taxonomy:
* class Liliopsida [ = monocotyledons]
    subclass Liliidae
       superorder Lilianae
       superorder Dioscoreanae
    subclass Commelinidae
       superorder Bromelianae
       superorder Pontederianae
       superorder Zingiberanae
       superorder Commelinanae
       superorder Hydatellanae
       superorder Juncanae
       superorder Poanae
    subclass Arecidae
       superorder Arecanae
    subclass Alismatidae
       superorder Alismatanae
    subclass Triurididae
       superorder Triuridanae
    subclass Aridae'
       superorder Aranae
       superorder Cyclanthanae
       superorder Pandananae
       superorder Typhanae

## Liliopsida in the Cronquist system

The internal taxonomy in the Cronquist system is:
* class Liliopsida [ = monocotyledons]
    subclass Alismatidae
       order Cyclanthales
       order Arales
    subclass Commelinidae
       order Commelinales
       order Eriocaulales
       order Restionales
       order Juncales
       order Cyperales
       order Hydatellales
       order Typhales
    subclass Zingiberidae
       order Bromeliales
       order Zingiberales
    subclass Liliidae
       order Liliales
       order Orchidales

## Liliopsida in the Reveal system

The internal taxonomy in the Reveal system is:
* class 3. Liliopsida
    subclass 1. Alismatidae
       superorder 1. Butomanae
       superorder 2. Alismatanae
    subclass 2. Triurididae
    subclass 3. Aridae
       superorder 1. Acoranae
       superorder 2. Aranaea
       superorder 3. Cyclanthanae
       superorder 4. Pandananae
    subclass 4. Liliidae
    subclass 5. Arecidae
       superorder 1. Arecanae
    subclass 6. Commelinidae
       superorder 1. Bromelianae
       superorder 2. Pontederianae
       superorder 3. Commelinanae
       superorder 4. Hydatellanae
       superorder 5. Typhanae
       superorder 6. Juncanae
    subclass 7. Zingiberidae
       superorder 1. Zingiberanae