What is "liliidae"

Liliidae \Liliidae\ prop. n. one of four subclasses or superorders of Monocotyledones; it comprises 17 families including: Liliaceae; Alliaceae; Amaryllidaceae; Iridaceae; Orchidaceae; Trilliaceae.

Syn: subclass 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.