Hesperoyucca newberryi

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.
"Hesperoyucca newberryi" is a perennial forming a rosette. It is semelparous (flowering once then dying). Leaves are narrow, up to long but usually less than across. Flowering stalks are up to tall, bearing cream-colored flowers. The fruit is a dry, egg-shaped capsule about long.