Pelecyphora alversonii commonly known as cushion foxtail cactus or cushion fox-tail cactus, is a species of flowering plant in the family Cactaceae, native to the southwestern United States.

[2] Pelecyphora alversonii usually grows sprouting and forms underground, cylindrical offshoots with a diameter of 6–9 cm.

The eight to ten central spines have a white to dark red or black tip and are 1.2 to 1.6 centimeters long.

[5] Pelecyphora alversonii is widespread in the United States in southeastern California in the Mojave Desert and neighboring Arizona at elevations around 75–600 meters.

[6] The specific epithet alversonii honors the mineral explorer Andrew H. Alverson (1845–1916).

[7] David Aquino & Daniel Sánchez moved the species to Pelecyphora based on phylogenetic studies in 2022.