Liliidae

Liliidae 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 Liliaceae.

Liliidae in Takhtajan system
The Takhtajan system treats this as one of six subclasses within class Liliopsida (= monocotyledons). This subclass consists of:
 * subclass Liliidae
 * superorder Lilianae
 * order Melanthiales
 * order Colchicales
 * order Trilliales
 * order Liliales
 * order Alstroemeriales
 * order Iridales
 * order Tecophilaeales
 * order Burmanniales
 * order Hypoxidales
 * order Orchidales
 * order Amaryllidales
 * order Asparagales
 * order Xanthorrhoeales
 * order Hanguanales
 * superorder Dioscoreanae
 * order Stemonales
 * order Smilacales
 * order Dioscoreales
 * order Taccales

Liliidae in Cronquist system
The Cronquist system treats this as one of five subclasses within class Liliopsida (= monocotyledons), and it consists of:
 * subclass Liliidae
 * order Liliales
 * order Orchidales

Liliidae in Dahlgren and Thorne systems
In the Dahlgren system and the Thorne system (1992) this is an important name: this subclass comprises the monocotyledons (in APG II these are the monocots).

Dahlgren (1985)

 * subclass Liliidae [= monocotyledons]
 * superorder Alismatanae
 * superorder Triuridanae
 * superorder Aranae
 * superorder Lilianae
 * superorder Bromelianae
 * superorder Zingiberanae
 * superorder Commelinanae
 * superorder Arecanae
 * superorder Cyclanthanae
 * superorder Pandananae

Thorne (1992)
(in the version of the system as depicted by Reveal)
 * subclass Liliidae [= monocotyledons ]
 * superorder Lilianae
 * superorder Hydatellanae
 * superorder Triuridanae
 * superorder Aranae
 * superorder Cyclanthanae
 * superorder Pandananae
 * superorder Arecanae
 * superorder Commelinanae

Liliidae in APG II system
The APG and APG II systems do not use formal botanical names above the rank of order, and names such as Liliopsida and Liliidae have no place in these systems.