Echinocereus arizonicus

Plants grow in small clumps. Stems are cylindric with 8–13 ribs, measuring . Areoles are spaced apart. Spines vary, being straight or contorted. Each areole has 1–8 central spines, long, and 7–14 radial spines, long, initially yellowish to brownish but turning gray. Echinocereus arizonicus has deep red to bright orange-red flowers, sometimes with a lighter yellowish-green center, , with a flower tube of that has short spines and hairs. Fruits are green with a brownish tinge, , and have white pulp. The chromosome count is 2n = 22. ==Subspecies==

Accepted subspecies: ==Distribution==

Plants are found growing in desert scrub and grasslands of the Chihuahuan Desert in Arizona, New Mexico in the United States and Chihuahua, Mexico at elevations between 1400 and 1900 meters. Plants are found growing along with Quercus turbinella, Quercus emoryi, Arctostaphylos pungens, Cercocarpus montanus, Nolina microcarpa, Dasylirion wheeleri, Agave chrysantha, Muhlenbergia emersleyi, Pinus monophylla, Juniperus pinchotii and Rhus trilobata. File:Echinocereus arizonicus (Arizona Hedgehog cactus) (16377847575).jpg|Plant growing in South Mountain Park in Phoenix, Arizona File:Federally endangered Arizona Hedgehog Cactus (Echinocereus arizonicus ssp. arizonicus) in bloom on April 28, 2023 at Telegraph Fire burn scar, Top-of-the-World, Arizona, Globe Ranger District, Tonto National Forest - 20230428-FS-CB-001.jpg|Blooming Plant in Tonto National Forest ==Taxonomy==

Common names include "Arizona claret-cup cactus" and "Arizona hedgehog cactus." ==References==