. . "Liliopsida" . "Yucca torreyi" . . . "Torrey's Yucca" . . . . . . . "Shafer" . "Agavaceae" . . . . . "Asparagales" . . . "Yucca" . . "Plantae" . "Magnoliophyta" . "Yucca torreyi Shafer" . . .