Eudicots
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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.
The name "eudicots" is formed by adding the botanical prefix "eu−" (= "true") to "dicots". The eudicots have those characters that many older textbooks associate with dicots. Since "dicots" is short for "dicotyledons" it is tempting to jump to the conclusion that "eudicots" is short for "eudicotyledons". However, the name is "eudicots".
Another name for this same clade 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 palaeodicots) produce monosulcate pollen, with a single pore set in a differently oriented groove called the sulcus. The name "tricolpates" is preferred under the PhyloCode.
The remaining, and more primitive, (former) dicots are sometimes informally referred to as palaeodicots ("palaeo−" = old). However this is strictly informal, as this is a paraphyletic group.
- Subdivision
- eudicots :
- : core eudicots :
- :: rosids :
- ::: eurosids I
- ::: eurosids II
- :: asterids :
- ::: euasterids I
- ::: euasterids II
In more detail, with in each clade some unplaced families and orders (unplaced genera are not mentioned):
- clade eudicots
- ::: family Buxaceae [+ family Didymelaceae]
- ::: family Sabiaceae
- ::: family Trochodendraceae [+ family Tetracentraceae]
- :: order Ranunculales
- :: order Proteales
- : clade core eudicots
- :::: family Aextoxicaceae
- :::: family Berberidopsidaceae
- :::: family Dilleniaceae
- ::: order Gunnerales
- ::: order Caryophyllales
- ::: order Saxifragales
- ::: order Santalales
- :: clade rosids
- ::::: family Aphloiaceae
- ::::: family Geissolomataceae
- ::::: family Ixerbaceae
- ::::: family Picramniaceae
- ::::: family Strassburgeriaceae
- ::::: family Vitaceae
- :::: order Crossosomatales
- :::: order Geraniales
- :::: order Myrtales
- ::: clade eurosids I
- :::::: family Zygophyllaceae [+ family Krameriaceae]
- :::::: family Huaceae
- ::::: order Celastrales
- ::::: order Malpighiales
- ::::: order Oxalidales
- ::::: order Fabales
- ::::: order Rosales
- ::::: order Cucurbitales
- ::::: order Fagales
- ::: clade eurosids II
- :::::: family Tapisciaceae
- ::::: order Brassicales
- ::::: order Malvales
- ::::: order Sapindales
- :: clade asterids
- :::: order Cornales
- :::: order Ericales
- ::: clade euasterids I
- :::::: family Boraginaceae
- :::::: family Icacinaceae
- :::::: family Oncothecaceae
- :::::: family Vahliaceae''
- ::::: order Garryales
- ::::: order Solanales
- ::::: order Gentianales
- ::::: order Lamiales
- ::: clade euasterids II
- :::::: family Bruniaceae
- :::::: family Columelliaceae [+ family Desfontainiaceae]
- :::::: family Eremosynaceae
- :::::: family Escalloniaceae
- :::::: family [[Paracryphiaceae]
- :::::: family Polyosmaceae
- :::::: family Sphenostemonacae
- :::::: family Tribelaceae
- ::::: order Aquifoliales
- ::::: order Apiales
- ::::: order Dipsacales
- ::::: order Asterales
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