APG IV system

2016 revision of a flowering plant classification

Evolution of angiosperms shown in diagram format, per APG IV

The APG IV system of flowering plant classification is the fourth version of a modern, mostly molecular-based, system of plant taxonomy for flowering plants (angiosperms) being developed by the Angiosperm Phylogeny Group (APG). It was published in 2016, seven years after its predecessor the APG III system was published in 2009, and 18 years after the first APG system was published in 1998.[1] In 2009, a linear arrangement of the system was published separately;[2] the APG IV paper includes such an arrangement, cross-referenced to the 2009 one.[1]

Compared to the APG III system, the APG IV system recognizes five new orders (Boraginales, Dilleniales, Icacinales, Metteniusales and Vahliales), along with some new families, making a total of 64 angiosperm orders and 416 families.[1] In general, the authors describe their philosophy as "conservative", based on making changes from APG III only where "a well-supported need" has been demonstrated. This has sometimes resulted in placements that are not compatible with published studies, but where further research is needed before the classification can be changed.[3]

Short version

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Families of flowering plants (APG IV)
  • Supergroup Plant:
  • Bryophyta
  • Marchantiophyta
  • Polypodiophyta
  • Acrogymnospermae
  • Angiospermae
Basal
angio
sperms
Amborellales
  • Amborellaceae
Nymphaeales
  • Hydatellaceae
  • Cabombaceae
  • Nymphaeaceae
Austrobaileyales
Magnoliidae
Canellales
Piperales
Magnoliales
Laurales
Chloranthidae
Chloranthales
Lilidae
(Monocots)
Acorales
Alismatales
Petrosaviales
Dioscoreales
Pandanales
Liliales
Asparagales
Arecales
Commelinales
Zingiberales
Poales
Ceratophyllidae
Ceratophyllales
Eudicots
Buxales
Proteales
Ranunculales
Trochodendrales
Dilleniales
Gunnerales
Saxifragales
Vitales
Cucurbitales
Fabales
Fagales
Rosales
Zygophyllales
Celastrales
Malpighiales
Oxalidales
Brassicales
Crossosomatales
Geraniales
Huerteales
Malvales
Myrtales
Picramniales
Sapindales
Berberidopsidales
Caryophyllales
Santalales
Cornales
Ericales
Icacinales
Metteniusales
Garryales
Gentianales
Boraginales
Vahliales
Solanales
Lamiales
Apiales
Aquifoliales
Asterales
Bruniales
Dipsacales
Escalloniales
Paracryphiales
  • Category

Detailed version

Key to symbols used:

* = the family has been added or its circumscription changed since the APG III system of 2009
† = the order has been added since the APG III system

Basal angiosperms

Magnoliids

Independent lineage: unplaced to more inclusive clade

Monocots

Probable sister of eudicots

Eudicots

Core eudicots

Superrosids

Rosids

Fabids

COM clade; placement uncertain
Malvids

Superasterids

Asterids

Lamiids
Campanulids

Phylogeny

Like the earlier APG systems, the APG IV revision is based on a phylogenetic tree for the angiosperms, as shown below.[4]

References

Bibliography

  • Angiosperm Phylogeny Group (2009), "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III", Botanical Journal of the Linnean Society, 161 (2): 105–121, doi:10.1111/j.1095-8339.2009.00996.x, hdl:10654/18083
  • Angiosperm Phylogeny Group (2016), "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV", Botanical Journal of the Linnean Society, 181 (1): 1–20, doi:10.1111/boj.12385
  • Haston, E.; Richardson, J.E.; Stevens, P.F.; Chase, M.W. & Harris, D.J. (2009), "The Linear Angiosperm Phylogeny Group (LAPG) III: a linear sequence of the families in APG III", Botanical Journal of the Linnean Society, 161 (2): 128–131, doi:10.1111/j.1095-8339.2009.01000.x
  • Fay, Michael (9 May 2016), "APG - classification by consensus", Kew Science, RBG Kew, archived from the original on 2016-08-05, retrieved 2016-06-12
  • Cole, Theodor C.H.; Hilger, Hartmut H. & Stevens, Peter F. (2019), Angiosperm Phylogeny Poster - Flowering Plant Systematics (PDF), retrieved 2023-06-16
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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.
John Ray system (1686–1704)
  • A discourse on the seeds of plants
  • Methodus plantarum nova
  • De Variis Plantarum Methodis Dissertatio Brevis
  • Methodus plantarum emendata et aucta
Linnaean system (1735–51)
Adanson system (1763)
Familles naturelles des plantes
De Jussieu system (1789)
Genera Plantarum, secundum ordines naturales disposita juxta methodum in Horto Regio Parisiensi exaratam
De Candolle system (1819–24)
Berchtold and Presl
system (1820–1823)
Agardh system (1825)
Classes Plantarum
Gray system (1821)
The Natural Arrangement of British Plants
Perleb system (1826)
Lehrbuch der Naturgeschichte des Pflanzenreichs
Dumortier system (1829)
Analyse des familles des plantes
Lindley system (1830–45)
  • An Introduction to the Natural System of Botany
  • The Vegetable Kingdom
Don system (1834)
General History of Dichlamydious Plants.
Bentham & Hooker system
(1862–83)
Genera plantarum ad exemplaria imprimis in herbariis kewensibus servata definita.
Baillon system (1867–94)
Histoire des plantes
Post-Darwinian (Phyletic)
Nineteenth century
Eichler system (1875–1886)
  • Blüthendiagramme: construirt und erläutert
  • Syllabus der Vorlesungen über Phanerogamenkunde
Engler system (1886–1924)
van Tieghem system (1891)
Traité de botanique
Twentieth century
Dalla Torre & Harms
system (1900–07)
Genera Siphonogamarum, ad systema Englerianum conscripta
Warming system (1912)
Haandbog i den systematiske botanik
Hallier system (1912)
L'origine et le système phylétique des angiospermes
Bessey system (1915)
The phylogenetic taxonomy of flowering plants
Wettstein system (1901–35)
Handbuch der systematischen Botanik
Lotsy system (1907–11)
Vorträge über botanische Stammesgeschichte, gehalten an der Reichsuniversität zu Leiden. Ein Lehrbuch der Pflanzensystematik.
Hutchinson system (1926–73)
The families of flowering plants, arranged according to a new system based on their probable phylogeny
Calestani system (1933)
Le origini e la classificazione delle Angiosperme
Kimura system (1956)
Système et phylogénie des monocotyledones
Emberger system (1960)
Traité de Botanique systématique
Melchior system (1964)
Syllabus der Pflanzenfamilien
Takhtajan system (1966–97)
  • A system and phylogeny of the flowering plants
  • Flowering plants: origin and dispersal
  • Diversity and classification of flowering plants
Cronquist system (1968–81)
  • The evolution and classification of flowering plants
  • An integrated system of classification of flowering plants
Goldberg system (1986–89
Classification, Evolution and Phylogeny of the Families of Dicotyledons
Dahlgren system (1975–85)
The families of the monocotyledons: structure, evolution, and taxonomy
Thorne system (1968–2000)
An updated phylogenetic classification of the flowering plants
Kubitzki system (1990–)
The Families and Genera of Vascular Plants
Reveal system (1997)
Reveal System of Angiosperm Classification
See also
Plantae at Wikispecies •