Opuntia basilaris var. treleasei

(J. M. Coulter) J. M. Coulter ex Toumey

in L. H. Bailey, Cycl. Amer. Hort. 3: 1147. 1901.

Common names: Kern beavertail pricklypear Trelease’s beavertail pricklypear
EndemicConservation concern
Basionym: Opuntia treleasei J. M. Coulter Contr. U.S. Natl. Herb. 3: 434. 1896 (as treleasii)
Treatment appears in FNA Volume 4. Treatment on page 144. Mentioned on page 143.

Stem segments erect, flattened, obovate, 9–20 × 5–7.5 cm; areoles 7–8 per diagonal row across midstem segment, circular. Spines 2–8 per areole, usually in distal areoles, spreading, yellow, straight, acicular, terete, 5–25 mm. Fruits with few, pale yellow spines. 2n = 33.

Phenology: Flowering spring (Mar–Apr).
Habitat: Grasslands
Elevation: 100-200 m


Opuntia basilaris var. treleasei is in the Center for Plant Conservation’s National Collection of Endangered Plants.

of conservation concern

Selected References


Lower Taxa

Donald J. Pinkava +
(J. M. Coulter) J. M. Coulter ex Toumey +
Opuntia treleasei +
Kern beavertail pricklypear +  and Trelease’s beavertail pricklypear +
100-200 m +
Grasslands +
Flowering spring (Mar–Apr). +
in L. H. Bailey, Cycl. Amer. Hort. +
Endemic +  and Conservation concern +
Opuntia basilaris var. treleasei +
Opuntia basilaris +
variety +