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Liliopsida Batsch (synonym: Liliatae)[1] 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:

Each of the systems mentioned above use their own internal taxonomy for the group.

Liliopsida in the Takhtajan system[edit]

The Takhtajan system used this internal taxonomy:

Liliopsida in the Cronquist system[edit]

The internal taxonomy in the Cronquist system is:

Liliopsida in the Reveal system[edit]

The internal taxonomy in the Reveal system is:



  • Clifford, H. T. (1977). Quantitative studies of inter-relationships amongst the Liliatae. pp. 77–96. in Kubitzki (1977)
  • Takhtajan, Armen Leonovich (1966). "Lilianae". Система и филогения цветкорых растений (Sistema i filogeniia tsvetkovykh rastenii) [Systema et Phylogemia Magnoliophytorum] (in Russian). trans. C Jeffrey, as Flowering plants: Origin and dispersal, Edinburgh : Oliver and Boyd, 1969. Moscow: Наука. p. 473. ISBN 978-0-05-001715-9. Retrieved 14 August 2015.
  • A. Takhtajan (1980). "Outline of the classification of flowering plants (Magnoliophya)". Botanical Review. 46 (3): 225–359. doi:10.1007/BF02861558. S2CID 30764910.
  • Takhtajan, Armen Leonovich (2009). Flowering Plants. Springer. ISBN 978-1-4020-9609-9. Retrieved 7 January 2014.
  • Singh, Gurcharan (2004). "Armen Takhtajan". Plant Systematics: An Integrated Approach. Science Publishers. pp. 269–277. ISBN 978-1-57808-351-0. Retrieved 23 January 2014.
  • Takhtajan, Armen (1991). Evolutionary trends in flowering plants. New York: Columbia Univ. Press. ISBN 9780231073288.
  • Kubitzki, Klaus, ed. (1977). Flowering Plants : Evolution and classification of higher categories. Symposium, Hamburg, September 8–12, 1976. Plant Systematics & Evolution - Supplementum 1. Wien: Springer. p. 416. ISBN 9783211814345. Retrieved 13 August 2015.

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