'Angiosperm Phylogeny Group' system of flowering plant classification
(APG, 1998. An ordinal Classification for the Families of Flowering
Plants. Annals of the Missouri Botanical Garden 85: 531-553)
organizes flowering plants into a "selected number of monophyletic suprafamilial
groups". The three most inclusive groups are here placed, for comparative
purposes, as classes (see discussion).
Internet information for a given
family can be obtained by browsing its 'group' page (listed above) or,
by using the family finder, which provides
alphabetical selection of the family name and direct placement on the appropriate
Subclass page of the Cronquist classification system.