"Kingia" and "Dasypogon" are unrelated Australian plants with a similar growth habit to "Xanthorrhoea". Both genera have at times been confused with xanthorrhoeas and misnamed as "grasstrees". Some plant classification systems such as Cronquist have included a wide range of other genera in the same family as "Xanthorrhoea". However, later anatomical and phylogenetic research has supported the view of Dahlgren who regarded "Xanthorrhoea" as the sole member of his family Xanthorrhoeaceae "sensu stricto", which is now treated as the subfamily Xanthorrhoeoideae.