See text Hemerocallidoideae is a subfamily of flowering plants, part of the family Asphodelaceae sensu lato in the monocot order Asparagales according to the APG system of 2016.

[3] The APG III system of 2009 used the broader definition of the group,[4] treating it as the subfamily Hemerocallidoideae of the family Xanthorrhoeaceae sensu lato.

[10] The broader version of the family, Hemerocallidaceae sensu lato, includes those species that would otherwise be assigned to Johnsoniaceae.

One study found Johnsoniaceae to be embedded in Hemerocallidaceae sensu stricto, but this result did not have strong bootstrap support.

[11] The broader version of Hemerocallidaceae is the one that was accepted by the Angiosperm Phylogeny Group when they published the APG II system in 2003.

When this system was superseded by APG III in 2009, Hemerocallidaceae was not recognized, instead being treated as subfamily Hemerocallidoideae of the expanded family Xanthorrhoeaceae sensu lato.

[12] As noted above, a broad circumscription of the group includes the two former families Hemerocallidaceae sensu stricto and Johnsoniaceae.