In what seems to be a tug - of - war, the spineless yucca has been classified by taxonomists as a member of the Liliaceae family and more recently as a member of the Agavaceae family.
Näib, et süstematiseerijad on vedanud vägikaigast sellepärast, kuhu sugukonda hiigel - tääkliilia kuuluma peaks; varem rühmitati ta Liliaceae sugukonda, hiljaaegu aga Agavaceae sugukonda.