Cylindropuntia echinocarpa

Cylindropuntia echinocarpa
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Genus: Cylindropuntia
Species:
C. echinocarpa
Binomial name
Cylindropuntia echinocarpa
Synonyms

Opuntia echinocarpa — Engelm. & Bigelow
Opuntia wigginsii

Cylindropuntia echinocarpa is a species of cactus known by the common names silver cholla, golden cholla, and Wiggins' cholla. It was formerly named Opuntia echinocarpa.[2]

Description

Silver cholla is a large, shrub to tree-like cactus which may exceed 0.5 to 2 m (1.6 to 6.6 ft) in height. Its stems and branches are made up of cylindrical green tubercles (segments) up to 1.5 cm wide and just under 1.0 cm tall. The elliptical white or yellow areoles turn gray and bear conspicuous yellow glochids that are 3 to 4 millimeters long. The six to 22 spines are present on almost all areoles. The fleshy tubercles each bear up to 20 long, straight, grayish or yellowish spines which may be nearly 4 cm long. The width of the tubercles is less than twice the length, which helps to distinguish it from buckhorn cholla (Cylindropuntia acanthocarpa), which occurs in a similar geographical distribution.[3] The thorns interlock and cover the shoots. They are erect to spreading, white to brown, sometimes darker, and are 2.5 to 5 centimeters long. Bristle-like thorns are also often present. The sheaths of the thorns are white at their base and golden yellow above.

The flowers are usually greenish yellow, sometimes pinkish or brownish in color. The fruit is lumpy, spiny, and tan in color, with white seeds and a foul scent, reminiscent of rancid butter. It measures up to 2 to 2.3 centimeters long. Very few fruits reach maturity, and many immature fruits can often be seen lying on the ground below.[3] This plant reproduces mainly through seeds, but its tubercles may break off and have a chance of producing new plants through asexual reproduction. [4][5]

  • Plant
    Plant
  • Spines closeup
    Spines closeup
  • Flower
    Flower

Distribution and habitat

Cylindropuntia echinocarpa is native to the Southwestern United States and Northwestern Mexico in the states of Baja California and Sonora, where it can be found the Sonoran Desert, the Mojave Desert, and Colorado Desert in California, Nevada, Utah, and Arizona in semi-desert, grassland and forestland at altitudes of 50 to 1700 meters. [2]

It commonly occurs in desert dry wash, creosote bush scrub, Joshua tree woodland, and pinyon-juniper woodland communities.[3] It ranges from Mono County to Baja California Peninsula.[3]

Taxonomy

The first description as Opuntia echinocarpa by George Engelmann and John Milton Bigelow was published in 1856. Frederik Marcus Knuth placed the species in the genus Cylindropuntia in 1936. Further nomenclature synonyms are Cactus echinocarpus (Engelm. & J.M.Bigelow) Lem. (1868) and Grusonia echinocarpa (Engelm. & J.M.Bigelow) G.D.Rowley (2006).

References

  1. ^ Pinkava, D.J.; Baker, M. & Puente, R. (2017). "Cylindropuntia echinocarpa". IUCN Red List of Threatened Species. 2017: e.T152740A121486897. Retrieved 20 February 2022.
  2. ^ a b USDA: Cylindropuntia echinocarpa . accessed 3.23.2013
  3. ^ a b c d Mojave Desert Wildflowers, Pam MacKay, 2nd ed., p 223, 266
  4. ^ Ebert, T.A. (2006). "Density dependent responses of Cacti, Cylindropuntia bigelovii and C. echinocarpa (Cactaceae), in the desert of Southern California, USA". Journal of Arid Environments. 66 (4): 609–619. Bibcode:2006JArEn..66..609E. doi:10.1016/j.jaridenv.2005.11.013. ISSN 0140-1963.
  5. ^ Bobich, E (2001). "Vegetative Reproduction as Related to Biomechanics, Morphology and Anatomy of Four Cholla Cactus Species in the Sonoran Desert". Annals of Botany. 87 (4): 485–493. doi:10.1006/anbo.2000.1360.
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