Here I very largely follow the most recent version of the Angiosperm Phylogeny Group classification (A.P.G. IV 2016).

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).

Mar 24, 2016 · An update of the Angiosperm Phylogeny Group (APG) classification of the orders and families of angiosperms is presented. Several new orders are recognized: Boraginales, Dilleniales, Icacinales, Metteniusiales and Vahliales.

Aug 4, 2017 · The Angiosperm Phylogeny Group 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).

APG IV has further stabilized with addition of 2 informal groups, 5 new orders, 10 new families, re-circumscription of 20 earlier families and reduction in number of unplaced taxa. A comparison of APG versions with 4 recent individual classifications proves it more stable.

The Angiosperm Phylogeny Group (APG) is an informal international group of systematic botanists who collaborate to establish a consensus on the taxonomy of flowering plants (angiosperms) that reflects new knowledge about plant relationships discovered through phylogenetic studies.

Kew scientist Mike Fay discusses the issues with classifying flowering plant species, and the efforts made by the Angiosperm Phylogeny Group (APG) to reclassify species using technological advances in DNA sequencing.