Astrophytum ornatum is a fascinating-looking, little cactus. It is called monk's hood cactus, but its other name, star cactus, is more descriptive. What is a monk's hood? This succulent could be your best friend if you travel. It is simple to care for with diminutive appeal that blends well with other succulents or all by itself. Read on to learn more about growing monk's hood cactus plants.