[harlem2347]

Hi! Marvin...
Lithops are often known as pebble plants or living stones. Individual plants usually have two bulbous, almost fused leaves opposite to each other and hardly any stem. The slit between the leaves contains the meristem and produces flowers and new leaves. Old leaves die after the new pair has emerged. The leaves of the Lithops are transparent. These leaves, or “windows” contain calcium oxalate crystals that diffuse onto the area that is being photosynthesized in the Lithop. This helps the plant absorb lots of sunlight even in minimum exposure. The leaves of the Lithops are considered to be one of the leading plants with the most developed "window" leaves. Occasionally two new pairs emerge and plants can eventually form large clumps. The plant is almost entirely buried in soil, only exposing the flat upper surfaces of leaves. This is an adaptation to the dry, hot environment.