The Angiosperm Phylogeny Group, An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV, Botanical Journal of the Linnean Society, 2016, 181(1):1-20, doi: 10.1111/boj.12385
Classification of flowering-plant orders and families. It provides the higher levels of the taxonomic tree. Genus and species names and synonyms follow the dated WCVP extraction.