Acer species are sometimes classified in their own family, Aceraceae, but have been grouped in Sapindaceae (along with Hippocastanaceae) in the most recent version of the Angiosperm Phyologeny Group system (Stevens 2001).
- Stevens, P.F. 2001 onwards. Angiosperm Phylogeny Website. Version 9, June 2008 [and more or less continuously updated since]. http://www.mobot.org/MOBOT/research/APweb/.
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