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Eudicots (Tricolpates)
Fossil range: Early Cretaceous - Recent
Scientific classification
Kingdom: Plantae
Division: Angiospermae
(unranked): Eudicots
Clades

Eudicots and Eudicotyledons are terms introduced by Doyle & Hotton (1991) to refer to a group of flowering plants that had been called tricolpates or non-Magnoliid dicots by previous authors. The term means, literally, "true dicotyledons" as it contains the majority of plants that have been considered dicotyledons and have typical dicotyledonous characters. The term "eudicots" has been widely adopted to refer to one of the two largest clades of angiosperms, monocots being the other. The remaining dicots are sometimes referred to as paleodicots but this term has not been widely adopted as it does not refer to a monophyletic group.

A large number of familiar plants are eudicots. A few are forget-me-not, cabbage, apple, dandelion, buttercup, maple and macadamia.

Another name for the eudicots is tricolpates, a name which refers to the structure of the pollen. The group has tricolpate pollen, or forms derived from it. These pollen have three or more pores set in furrows called colpi. In contrast, most of the other seed plants (that is the gymnosperms, the monocots and the paleodicots) produce monosulcate pollen, with a single pore set in a differently oriented groove called the sulcus. The name "tricolpates" is preferred by some botanists in order to avoid confusion with the dicots, a non-monophyletic group (Judd & Olmstead 2004).

The name eudicots (plural) is used in the APG system, of 1998, and APG II system, of 2003, for classification of angiosperms. It is applied to a clade, a monophyletic group, which includes most of the (former) dicotyledons.

Subdivision

The eudicots can be divided into two groups: the basal eudicots and the core eudicots. [1] Basal eudicots is an informal name for a paraphyletic group. The core eudicots are a monophyletic group. [2] Within the core eudicots, the largest groups are the "rosids" (core group with the prefix "eu−") and the "asterids" (core group with the prefix "eu−").


In more detail, within each clade some unplaced families and orders (unplaced genera are not mentioned):

Note : “ + ....” = optional, as a segregate of the previous family.

References

  1. ^ Worberg A, Quandt D, Barniske A-M, Löhne C, Hilu KW, Borsch T (2007) Phylogeny of basal eudicots: insights from non-coding and rapidly evolving DNA. Organisms, Diversity and Evolution 7 (1), 55-77.
  2. ^ Douglas E. Soltis, Pamela S. Soltis, Peter K. Endress, and Mark W. Chase. Phylogeny and Evolution of Angiosperms. Sinauer Associates: Sunderland, MA, USA. (2005).
  • Doyle, J. A. & Hotton, C. L. Diversification of early angiosperm pollen in a cladistic context. Pp. 169-195 in Pollen and Spores. Patterns of Diversification (eds Blackmore, S. & Barnes, S. H.) (Clarendon, Oxford, 1991).
  • Walter S. Judd and Richard G. Olmstead (2004). "A survey of tricolpate (eudicot) phylogenetic relationships". American Journal of Botany 91: 1627–1644. doi:10.3732/ajb.91.10.1627.   (full text )
  • Eudicots in Stevens, P. F. (2001 onwards). Angiosperm Phylogeny Website. Version 7, May 2006.

External links

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Wikispecies

Up to date as of January 23, 2010

From Wikispecies

Leucophyllum frutescens

Taxonavigation

Classification System: APG II (down to family level)

Main Page
Cladus: Eukaryota
Regnum: Plantae
Cladus: Angiospermae
Cladus: Eudicots
Cladus: Core eudicots - Unassigned Eudicots

Name

Eudicots

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
  • Friedrich A. Lohmueller: The Botanical System of the Plants [1] (Following APG II classification)
  • NCBI link: eudicotyledons (Following APG classification)
Wikimedia Commons For more multimedia, look at Eudicots on Wikimedia Commons.

Simple English

Eudicots (Tricolpates)
Fossil range: Early Cretaceous - Recent
File:Primula
Scientific classification
Kingdom: Plantae
Division: Angiospermae
(unranked) Eudicots
Clades

Eudicots and Eudicotyledons are a type of flowering plant. The are one of the two major clades. A few examples of eudicots are forget-me-not, cabbage, apple, dandelion, buttercup, maple and macadamia.

Look up Eudicots in Wikispecies, a directory of species

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