The APG II system, of 2003 (unchanged from the APG system, of 1998), does recognize this family, unplaced as to order and merely assigned to the clade core eudicots. The family consists of one or two genera, Berberidopsis, with two species and Streptothamnus, with a single species.
However, APG II mentions the possibility of recognizing an order Berberidopsidales, which would comprise the two families Aextoxicaceae and Berberidopsidaceae. The APG III system of 2009 formally recognized the order Berberidopsidales and placed Aextoxicaceae and Berberidopsidaceae in it.
- Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III" (PDF). Botanical Journal of the Linnean Society 161 (2): 105–121. doi:10.1111/j.1095-8339.2009.00996.x. Retrieved 2013-07-06.
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