This smaller cactus, commonly known as the Hedgehog cactus, is fairly common in the Arizona Sonora Desert. In fact, it is so common that most people probably ignore it and avoid it as they would any cactus especially one with long sharp spines. Once a year this cactus shines. For a few days in the Spring, these cactus put on their own version of greeting the oncoming summer. I am always sad when I get too busy and miss the bloom times of these and other cactus. But, you can only take so many pictures of cactus flowers. Fortunately, I have yet to reach my limit of the number of pictures.