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.Flora of North America v 26 p 441, Hesperoyucca newberryiBONAP (Biota of North America Program) floristic synthesis, 2013, Hesperoyucca newberryi
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.Clary, Karen Husum. 2001. The genus Hesperoyucca (Agavaceae) in the western United States and Mexico: New nomenclatural combinations. Sida 19(4): 839–847.McKelvey, Susan Delano. 1947. Yuccas of the Southwestern United States 2: 49–52, map 1.Hochstätter, F. 2000. Succulenta (Netherlands) 79:39.United States Department of Agriculture, National Forest Service database, Hesperocallis whipplei, H. newberryi
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