This succulent specimen native to Saudi Arabia grows in arid and rocky areas; adapting to the surrounding environment by accumulating water in its fleshy stems. In fact, it has cylindrical stems of light-dark brown color that with time tend to become gray-brownish; equipped with 4-5 ribs and with a rough and wrinkled skin surface almost scaly. Its leaves are sparse and small, triangular or lanceolate green. The highlight of R. macrolobuom are its flowers: star-shaped that exude a delicate citrus scent. The colors of the flowers are very particular; they vary from black, green, red, purple to cream with different streaks of black, green or brown making the plant unique!