RARE Obregonia denegrii ariocarpus cactus. This little beauty is already flowering white flowers. Simply beautiful/ This plant is from Mexico. This plant is also known as the "Artichoke cactus". It is gray-green to deep green. The body consists of rather angular tubercles or scales that taper to a point at the top and curve downwards. The points can be sharp to the touch. These stiff scales resemble succulent leaves, and are arranged in neat spirals. Except for the spines on the tips of the tubercles or scales, this is essentially spineless. The spines that are present drop when the plant reaches maturity.