Opuntia leucotricha is a species of cactus with the common names: arborescent pricklypear, Aaron's beard cactus, and semaphore cactus; and (in Spanish) duraznillo blanco and nopal blanco.

[2] It is a species of Opuntia (prickly pear) that is endemic to Mexico.

The cactus occurs in mountain habitats, in the states of: San Luis Potosí, Tamaulipas, Zacatecas, Guanajuato, and Querétaro.

[2] Opuntia leucotricha is a tree-like cactus, growing up to 5 metres (16 ft) tall.

The platyclades have a thin fuzz of white hairs on their joints.