Hamamelidales is an order of
flowering plants formerly accepted in a number of systems of plant taxonomy, including the
Cronquist system published in 1968 and 1988. The order is not currently accepted in the
Angiosperm Phylogeny Group III system of plant taxonomy, the most widely accepted system as molecular systematic studies have suggested that these families are not closely related to each other. The
APG II system (2003) assigns them to several different orders: Hamamelidaceae and Cercidiphyllaceae to
Saxifragales, Eupteleaceae to
Ranunculales, Platanaceae to
Proteales, and Myrothamnaceae to
Gunnerales. Additional studies of the
chloroplast genome have since confirmed that the families moved into the Saxigragales are closely related.