text: Hesperocallis , sometimes placed in its own family , Hesperocallideaceae , has recently been shown to be closely related and its inclusion in Agavaceae has been recommended .
simplified: Hesperocallis , sometimes placed in its own family , Hesperocallideaceae , has recently been shown to be closely related and its inclusion in Agavaceae has been recommended ( Pires et al . 2004 ) .