From Wikipedia, the free encyclopedia

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

Magnolia flowers

Cronquist and Takhtajan systems

In the Takhtajan system and the Cronquist system the name was used for the group known as dicotyledons.

Magnoliopsida in the Takhtajan system

The Takhtajan system used this internal taxonomy:

• class Magnoliopsida [= dicotyledons]

  subclass Magnoliidae

  subclass Nymphaeidae

  subclass Nelumbonidae

  subclass Ranunculidae

  subclass Caryophyllidae

  subclass Hamamelididae

  subclass Dilleniidae

  subclass Rosidae

  subclass Cornidae

  subclass Asteridae

  subclass Lamiidae

Magnoliopsida in the Cronquist system

The Cronquist system used this internal taxonomy (in the 1981 version):

• class Magnoliopsida [= dicotyledons]

  subclass Magnoliidae

  subclass Hamamelidae

  subclass Caryophyllidae

  subclass Dilleniidae

  subclass Rosidae

  subclass Asteridae

Dahlgren and Thorne systems

The Dahlgren system and the Thorne system (1992) used the name Magnoliopsida for the flowering plants (angiosperms). However, the Cronquist system has been very popular and there have been many versions of the system published. In some of these Cronquist-based systems the name Magnoliopsida (at the rank of class) refers to the flowering plants (the angiosperms).

• class Magnoliopsida [= angiosperms]

  subclass Magnoliidae [= dicotyledons]

  subclass Liliidae [= monocotyledons]

Reveal system

The Reveal system used the name Magnoliopsida for a group of the primitive dicotyledons, corresponding to about half of the plants in the magnoliids:

• class 1. Magnoliopsida

  superorder 1. Magnolianae

  superorder 2. Lauranae

APG systems

In the APG and APG II systems botanical names are used only at the rank of order and below. Above the rank of order, these systems use their own names, such as angiosperms, eudicots, monocots, rosids, etc. These names refer to clades (unranked). This class Magnoliopsida is not defined. Note that the idea that dicotyledons could be a taxonomic unit and get a formal name is rejected by the APG: the dicots are considered to be paraphyletic.

Definition from Wiktionary, a free dictionary

Translingual

Wikipedia has an article on:

Magnoliopsida

Wikipedia

Wikispecies has information on:

Magnoliopsida

Wikispecies

Etymology

Latinized name of Pierre Magnol, French botanist

Proper noun

Magnoliopsida

1. (taxonomy) A taxonomic class within the division Magnoliophyta — the dicots.

Hyponyms

From Wikispecies

Magnolia campbellii

Taxonavigation

Classification System: APG II (down to family level)

Main Page
Cladus: Eukaryota
Regnum: Plantae
Cladus: Angiospermae
Cladus: eudicots - magnoliids - monocots - Unassigned Angiospermae

Name

Angiosperms [ APG II ]

Synonyms

• Angiospermae [ Engler, Wettstein ]
• Magnoliophyta [ Cronquist ]
• Magnoliopsida [ Thorne, Dalhlgren ]
• Magnoliidae [ APG III ]
• Angiospermae (PhyloCode), etc

References

• Angiosperm Phylogeny Group (2003). An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II. Botanical Journal of the Linnean Society 141: 399–436 pdf file
• Dahlgren RMT, Clifford HT, Yeo PF. 1985. The families of the monocotyledons: structure, evolution, and taxonomy. Berlin: Spinger-Verlag. System of Dahlgren, Clifford and Yeo, 1985
• Cronquist A. 1981. An integrated system of classification of flowering plants. New York: Columbia University Press.Cronquist system (1981)
• PBIO 250 Lecture notes in Plant Taxonomy (James L. Reveal)
• Comparison of Cronquist & APG systems (GD Carr, Univ of Hawaii)
• Engler A. 1930. Saxifragaceae. In: Engler A, Prantl K, eds. Die natürlichen Pflanzenfamilien 18a. Leipzig: W. Engelman, 74–226.
• Takhtajan AL. 1997. Diversity and classification of flowering plants. New York: Columbia University Press.

Vernacular names

For more multimedia, look at angiosperms on Wikimedia Commons.