Opuntia basilaris

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Opuntia basilaris
Wild Opuntia basilaris.jpg

Secure (NatureServe)
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Core eudicots
Order: Caryophyllales
Family: Cactaceae
Genus: Opuntia
Species: O. basilaris
Binomial name
Opuntia basilaris
Engelm. & J.M. Bigelow, 1857

Opuntia basilaris, the beavertail cactus or beavertail pricklypear, is a cactus species found in the southwest United States. It occurs mostly in the Mojave, Anza-Borrego, and Colorado Deserts, as well as in the Colorado Plateau and northwest Mexico. It is also found throughout the Grand Canyon and Colorado River region as well as into southern Utah and Nevada, and in the western Arizona regions along the Lower Colorado River Valley. Opuntia basilaris is a medium-sized to small prickly pear cactus, depending on variety, growing to about 60 cm tall, with pink to rose colored flowers. A single plant may consist of hundreds of fleshy, flattened pads. These are more or less blue-gray, depending on variety, growing to a length of 14 cm and are maximum 10 cm wide and 1 to 1.5 cm thick. They are typically spineless, but have instead many small barbed bristles, called glochids, that easily penetrate the skin. Opuntia basilaris blooms from spring to early summer.[1]

The species is variable in nature and several names under different ranks has been described to science. Only four of these are generally accepted.

  • Opuntia basilaris var. basilaris (2n=22)
  • Opuntia basilaris var. brachyclada (2n=22) - Little beavertail pricklypear
  • Opuntia basilaris var. heilii (2n=22) - Heil's beavertail
  • Opuntia basilaris var. longiareolata (2n=22) - Elongated beavertail prickly pear or Grand Canyon beavertail pricklypear
  • Opuntia basilaris var. treleasei(2n=33) - Trelease's beavertail prickly pear, Bakersfield cactus (This variety is designated as endangered under the federal Endangered Species Act and California Endangered Species Act, which means that killing or possessing it is prohibited in California)

Some experts consider the Trelease's beavertail to be a full species (Bowen 1987, R. van de Hoek). It is unique among the varieties of Opuntia basilaris in that the areoles contain spines in addition to the bristles; this indicates that the species does vary a lot in its exterior.

An April Fools day blooming, draws a Diadasia bee for an early Spring pollination



Opuntia basilaris contains 0.01% mescaline and 4-hydroxy-3-5-dimethoxyphenethylamine.[2]


The Cahuilla Native Americans used beavertail as a food staple. The buds were cooked or steamed, and then were eaten or stored. The large seeds were ground up to be eaten as mush. [3][4]



  1. ^ "Opuntia basilaris". Opuntia Web. 
  2. ^ cite web|title=Plant Chemistry|http://findmeacure.com/2012/02/16/opuntia-basilaris/
  3. ^ "Cahuilla Plants". enduringknowledgepublications.com. Retrieved 2012.  Check date values in: |access-date= (help)
  4. ^ "Temalpakh Ethnobotanical Garden". http://www.malkimuseum.org. Retrieved 2007.  Check date values in: |access-date= (help); External link in |website= (help)

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