Hesperoyucca newberryi, commonly known as the Grand Canyon Quixote plant or Newberry's yucca, is a plant species endemic to Arizona.

It is found only in Mohave and Coconino Counties, on the walls of canyons near the Colorado River.

[2][3] Hesperoyucca newberryi is a perennial forming a rosette.

It is semelparous (flowering once then dying).

The fruit is a dry, egg-shaped capsule about 4 cm (1.6 in) long.