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]
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
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
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.
Prodromus systemati naturalis regni vegetabilis sive enumeratio contracta ordinum, generum specierumque plantarum huc usque cognitarum, juxta methodi naturalis normas digesta
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]
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
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
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.
Prodromus systemati naturalis regni vegetabilis sive enumeratio contracta ordinum, generum specierumque plantarum huc usque cognitarum, juxta methodi naturalis normas digesta