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| The '''APG II system''' ('''Angiosperm Phylogeny Group II system''') of plant classification is the second, now obsolete, version of a modern, mostly ]-based, ] that was published in April 2003 by the ].<ref name="APGII">Angiosperm Phylogeny Group (2003). '']'' 141(4): 399-436. ]</ref> It was a revision of the first ], published in 1998, and was superseded in 2009 by a further revision, the ]. | The '''APG II system''' ('''Angiosperm Phylogeny Group II system''') of plant classification is the second, now obsolete, version of a modern, mostly ]-based, ] that was published in April 2003 by the ].<ref name="APGII">Angiosperm Phylogeny Group (2003). '']'' 141(4): 399-436. ]</ref> It was a revision of the first ], published in 1998, and was superseded in 2009 by a further revision, the ]. | ||
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| ==History== | |||
| APG II was published as: | |||
| *Angiosperm Phylogeny Group (2003). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II". '']'' '''141'''(4): 399-436. (Available online: | | ]) | |||
| Each of the APG systems represents the broad consensus of a number of ] ]s, united in the APG, working at several institutions worldwide. | |||
| The APG II system recognized 45 ], five more than the APG system. The new orders were ], ], ], ], and ], all of which were families unplaced as to order, although contained in ] clades, in the APG system. APG II recognized 457 ], five fewer than the APG system. Thirty-nine of the APG II families were not placed in any order, but 36 of the 39 were placed in a supra-ordinal clade within the angiosperms. Fifty-five of the families came to be known as "bracketed families". They were optional ] of families that could be ] in a ]. | |||
| The APG II system was influential and was adopted in whole or in part (sometimes with modifications) in a number of references. It was superseded 6½ years later by the ], published in October 2009. | |||
| ==Groups== | ==Groups== | ||
Revision as of 16:30, 4 August 2021
See also: Angiosperm Phylogeny GroupThe APG II system (Angiosperm Phylogeny Group II system) of plant classification is the second, now obsolete, version of a modern, mostly molecular-based, system of plant taxonomy that was published in April 2003 by the Angiosperm Phylogeny Group. It was a revision of the first APG system, published in 1998, and was superseded in 2009 by a further revision, the APG III system.
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Groups
Main groups in the system (all unranked clades between the ranks of class and order):
- angiosperms :
Shown below is the classification in full detail, except for the fifteen genera and three families that were unplaced in APG II. The unplaced taxa were listed at the end of the appendix in a section entitled "Taxa of Uncertain Position". Under some of the clades are listed the families that were placed incertae sedis in that clade. Thirty-six families were so placed. This means that their relationship to other members of the clade is not known.
- paraphyletic grade basal angiosperms
- family Amborellaceae
- family Chloranthaceae
- family Nymphaeaceae
- order Austrobaileyales
- order Ceratophyllales
- clade magnoliids
- order Canellales
- order Laurales
- order Magnoliales
- order Piperales
- clade monocots
- family Petrosaviaceae
- order Acorales
- order Alismatales
- order Asparagales
- order Dioscoreales
- order Liliales
- order Pandanales
- clade commelinids
- family Dasypogonaceae
- order Arecales
- order Commelinales
- order Poales
- order Zingiberales
- clade eudicots
- family Buxaceae
- family Sabiaceae
- family Trochodendraceae
- order Proteales
- order Ranunculales
- clade core eudicots
- family Aextoxicaceae
- family Berberidopsidaceae
- family Dilleniaceae
- order Gunnerales
- order Caryophyllales
- order Santalales
- order Saxifragales
- clade rosids
- family Aphloiaceae
- family Geissolomataceae
- family Ixerbaceae
- family Picramniaceae
- family Strasburgeriaceae
- family Vitaceae
- order Crossosomatales
- order Geraniales
- order Myrtales
- clade eurosids I
- family Zygophyllaceae
- family Huaceae
- order Celastrales
- order Cucurbitales
- order Fabales
- order Fagales
- order Malpighiales
- order Oxalidales
- order Rosales
- clade eurosids II
- family Tapisciaceae
- order Brassicales
- order Malvales
- order Sapindales
- clade asterids
- clade euasterids I
- family Boraginaceae
- family Icacinaceae
- family Oncothecaceae
- family Vahliaceae
- order Garryales
- order Gentianales
- order Lamiales
- order Solanales
- clade euasterids II
- family Bruniaceae
- family Columelliaceae
- family Eremosynaceae
- family Escalloniaceae
- family Paracryphiaceae
- family Polyosmaceae
- family Sphenostemonaceae
- family Tribelaceae
- order Apiales
- order Aquifoliales
- order Asterales
- order Dipsacales
Note: "+ ..." = optionally separate family, that may be split off from the preceding family.
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(4): 399-436. doi: 10.1046/j.1095-8339.2003.t01-1-00158.x
| List of systems of plant taxonomy | |||||||||||||||||||||||||||||||||||||||||||||||||||
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| This is a selected list of the more influential systems. There are many other systems, for instance a review of earlier systems, published by Lindley in his 1853 edition, and Dahlgren (1982). Examples include the works of Scopoli, Ventenat, Batsch and Grisebach. | |||||||||||||||||||||||||||||||||||||||||||||||||||
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