''Opuntia engelmannii'' is a prickly pear common across the south-central and

Southwestern United States The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural region of the United States that generally includes Arizona, New Mexico, and adjacent portions of California, Colorado, ...

and northern

Mexico Mexico ( Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Gua ...

. It goes by a variety of common names, including desert prickly pear, discus prickly pear, Engelmann's prickly pear in the US, and nopal, abrojo, joconostle, and vela de coyote in Mexico. The nomenclatural history of this species is somewhat complicated due to the varieties, as well as its habit of hybridizing with '' Opuntia phaeacantha''. It differs from '' Opuntia phaeacantha'' by being green year round instead of turning reddish purple during winter or dry seasons, as well as having yellow flowers with red centers.

Varieties

*''Opuntia engelmannii'' var. ''cuija'' — nopal cuijo; endemic to Mexico, in Guanajuato, Hidalgo, San Luis Potosí. *''Opuntia engelmannii'' var. ''engelmannii'' — Engelmann's prickly pear; Mexico, southwestern U.S., California *''Opuntia engelmannii'' var. ''flavispina'' — yellow-spined prickly pear; Arizona, Mexico *''Opuntia engelmannii'' var. ''laevis'' — smooth prickly pear; Arizona * ''Opuntia engelmannii'' var. ''lindheimeri'' — Texas prickly pear; endemic to U.S. in Louisiana, New Mexico, Oklahoma, Texas. *''Opuntia engelmannii'' var. ''linguiformis'' — cow's tongue cactus, cow tongue prickly pear; Texas ''Opuntia engelmannii'' var. ''flexospina'' is most likely a spiny form of '' Opuntia aciculata''. Balchik Botanical Garden 2017 53.jpg, ''O. e.'' var. ''engelmannii'' Opuntia engelmannii flavispina 1zz.jpg, ''O. e.'' var. ''flavispina'' Flower Opuntia engelmannii var lindheimeri.jpg, An unusual orange-red form of ''O. e.'' var. ''lindheimeri'' Cacti, Porto Botanical gardens..jpg, ''O. e.'' var. ''linguiformis'' Opuntia17 filtered.jpg, ''O. e.'' var. ''laevis'' (right)

Distribution

The ''Opuntia engelmannii'' range extends from

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the mo ...

Louisiana Louisiana , group=pronunciation (French: ''La Louisiane'') is a state in the Deep South and South Central regions of the United States. It is the 20th-smallest by area and the 25th most populous of the 50 U.S. states. Louisiana is borde ...

in the United States, and from

Sonora Sonora (), officially Estado Libre y Soberano de Sonora ( en, Free and Sovereign State of Sonora), is one of the 31 states which, along with Mexico City, comprise the Federal Entities of Mexico. The state is divided into 72 municipalities; the ...

(state) and Chihuahua (state), to the Tamaulipan matorral in north and central Tamaulipas. In the

Sonoran Desert The Sonoran Desert ( es, Desierto de Sonora) is a desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States (in Arizona ...

, terminal pads face predominantly east-west, so as to maximize the absorption of solar radiation during summer rains. Although found occasionally in the Mojave Desert, it tends to be replaced by '' Opuntia basilaris'', which does not need the summer rain.

Naturalised Naturalization (or naturalisation) is the legal act or process by which a non-citizen of a country may acquire citizenship or nationality of that country. It may be done automatically by a statute, i.e., without any effort on the part of the i ...

in southern and eastern

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

, including Loisaba in

Kenya ) , national_anthem = " Ee Mungu Nguvu Yetu"() , image_map = , map_caption = , image_map2 = , capital = Nairobi , coordinates = , largest_city = Nairobi ...

Description

The overall form of ''Opuntia engelmannii'' is generally shrubby, with dense clumps up to high, usually with no apparent trunk. The pads are green (rarely blue-green), obovate to round, about 15–30 cm long and 12–20 cm wide. The

glochid Glochids or glochidia (singular "glochidium") are hair-like spines or short prickles, generally barbed, found on the areoles of cacti in the sub-family ''Opuntioideae''. Cactus glochids easily detach from the plant and lodge in the skin, causin ...

s are yellow initially, then brown with age. Spines are extremely variable, with anywhere from 1-8 per areole, and often absent from lower areoles; they are yellow to white, slightly flattened, and 1–6 cm long. The flowers are yellow, occasionally reddish, 5–8 cm in diameter and about as long. Flowering is in April and May, with each bloom lasting only one day, opening at about 8AM and closing 8 hours later. Pollinators include solitary bees, such as the Antophoridae, and sap beetles. The purple fleshy fruits are 3–7 cm long.

Uses

The fruits were a reliable summer food for Native American tribes.U. of Michigan: Native American Ethnobotany Database
/ref> The Tohono O'odham of the Sonoran Desert, in particular, classified the fruits by color, time of ripening, and how well they kept in storage. ''Opuntia engelmannii'' is cultivated as an

ornamental plant Ornamental plants or garden plants are plants that are primarily grown for their beauty but also for qualities such as scent or how they shape physical space. Many flowering plants and garden varieties tend to be specially bred cultivars that ...

, for use in

drought tolerant Drought tolerance is the ability to which a plant maintains its biomass production during arid or drought conditions. Some plants are naturally adapted to dry conditions'','' surviving with protection mechanisms such as desiccation tolerance, deto ...

gardens, container plantings, and

natural landscaping Natural landscaping, also called native gardening, is the use of native plants and adapted species, including trees, shrubs, groundcover, and grasses which are local to the geographic area of the garden. Benefits Maintenance Natural landsc ...

projects.Master Gardeners of the University of Arizona Pima County Cooperative Extension — ''Opuntia engelmannii''
/ref>

References

* Edward F. Anderson, ''The Cactus Family'' (Timber Press, 2001), pp. 497–498 * Raymond M. Turner, Janice E. Bowers, and Tony L. Burgess, ''Sonoran Desert Plants: an Ecological Atlas'' (Tucson: The University of Arizona Press, 1995) pp. 291–293

External links

USDA Plants Profile for ''Opuntia engelmannii'' var. ''lindheimeri'' (Texas pricklypear)''Opuntia engelmannii'' — U.C. Photo galleryHerbarium specimenOpuntia engelmannii photo gallery at Opuntia Web
{{Authority control engelmannii Cacti of Mexico Cacti of the United States North American desert flora Flora of the California desert regions Flora of the Chihuahuan Desert Flora of the Sonoran Deserts Flora of Northwestern Mexico Flora of Northeastern Mexico Flora of Central Mexico Flora of the Southwestern United States Flora of Arizona Flora of California Flora of Nevada Flora of New Mexico Flora of Texas Flora of Oklahoma Flora of Louisiana Flora of Utah Flora of Chihuahua (state) Flora of Sonora Desert fruits Plants used in Native American cuisine