The APG II Classification

The Angiosperm Phylogeny Group issued the Angiosperm Phylogeny Group's second, now obsolete, version of a modern, primarily molecular-based system of plant taxonomy in April 2003. It was a revision of the initial APG system, which was released in 1998, and it was supplanted in 2009 by a new revision, the APG III system.

The APG II system recognised 45 orders, which were five more than the APG system. The new orders were Austrobaileyales, Canellales, Gunnerales, Celastrales, and Crossosomatales, all of which were families in the APG system that were unplaced as to order but had supra-ordinal clades. APG II identified 457 families, five fewer than the original APG method. Thirty-nine APG II families were not ordered, but 36 of the 39 were assigned to a supra-ordinal clade within the angiosperms. Fifty-five of the families were dubbed "bracketed families." They were optional family segregates that may be limited in a broader sense.The APG II system was influential and was used in a number of references in whole or in part.