Lithops
 Lithops is a genus of succulent plants in the ice plant family Aizoaceae. Members of the genus are native to southern Africa. The name is derived from the Ancient Greek words λίθος (lithos) meaning stone and ὄψ (ops) meaning face referring to the stone-like appearance of the plants. They avoid being eaten by blending in with surrounding rocks and are often known as pebble plants or living stones.