Cylindropuntia acanthocarpa var. major (Engelm.) D.J.Pinkava  
Family: Cactaceae
buckhorn cholla
[Opuntia acanthocarpa var. major (Engelm. & Bigelow) L. Benson,  more]
Cylindropuntia acanthocarpa var. major image
Shrubs, sprawling, with numerous branches, usually at obtuse angles. Stem segments green to dark green, 8-20(-31) cm; tubercles salient, moderately broad, 1.5-2.5 cm. Spines 14-18(-23) per areole, yellow to deep red-brown, aging gray, not baggy sheathed; major abaxial spines usually deflexed, spreading. Flowers: inner tepals yellow, bronze, or brick red. Fruits spiny; areoles 14-22(-26). 2n = 22. Flowering spring (Mar-Jun). Sonoran Desert, sandy flats, washes, rocky slopes; 300-900 m; Ariz.; Mexico (Sonora). Cylindropuntia acanthocarpa var. major hybridizes with C. bigelovii (= C. campii M. A. Baker & Pinkava).

PLANT: Shrubs sprawling, with numerous branches, mostly at obtuse angles. STEM: segments green to dark-green, 8-20(-31) cm long; tubercles salient, moderately broad, 15-25 mm long. SPINES: yellow to deep red-brown, aging gray, not baggy-sheathed, 14-18(-23) per areole; major basal spines mostly deflexed, spreading. FLOWER: inner tepals yellow to bronze to brick-red. FRUIT: spiny; areoles 14-22(-26). 2n = 22. NOTES: See also parent taxon. Sandy desert flats and washes to rocky slopes; Maricopa, Pima, Pinal cos.; 300-900 m (1000-2900 ft); Mar-Jun; n Son. in Mex. Hybridizes with: C. bigelovii var. bigelovii near Phoenix, AZ, this hybrid appearing similar but as a slightly more open tree than C. bigelovii var. bigelovii, with yellow green inner tepals and magenta filaments, 2n = 44.; C. leptocaulis (see C.tetracantha); C. spinosior, this hybrid as a sprawling shrub with irregular branching pattern, the spines clusters with 1 or more spines longer than others, the fruits fleshy, some with 1-few spines per fruit, 2n = 22, Pinal Co.; C. versicolor in Pima and Pinal cos, this hybrid with fleshy tuberculate fruits but often with 1-2 short permanent spines at apex and longer and more numerous spines per stem areole. REFERENCES: Pinkava, Donald J. 1999. Cactaceae. Ariz. - Nev. Acad. Sci. 32(1).
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Steve Jones  
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image
Cylindropuntia acanthocarpa var. major image