Praecereus saxicola is a flowering plant in the family Cactaceae that is found in Bolivia, Argentina and Paraguay [2] Praecereus saxicola grows shrubby with sparsely to well branched, upright to spreading, blue green stems of 1.5 to 3 centimeters in diameter.

[3] Praecereus saxicola is widespread in southwestern Brazil and northeastern Argentina at altitudes of 300 to 900 meters.

The first description as Cereus saxicola was published in 1893 by Thomas Morong.

[4] The specific epithet saxicola is derived from the Latin words saxum for 'rock' and -cola for '-dwelling' and refers to the rocky habitat of the species.

Nigel Paul Taylor placed the species in the genus Praecereus in 1997.