Century plant family. Monocots. The 2009 Angiosperm Phylogeny Group III system reclassified this family as the subfamily Agavoideae within Asparagaceae (the asparagus family). Note also that at one time, these plants were considered part of Liliaceae (the lily family). The usage here follows the Jepson eFlora entry, re-visited 2017-04-22, which retains Agavaceae.