The term Genus Echinocactus actually describes a group of cacti species with similar characteristics. Some synonyms for this group include the Barrel Cactus, the Globular Cactus, and the Horse Crippler Cactus. These plants are named for their rounded shape and spiky exterior, with long spines and short clusters of flowers. Indigenous to North America, they can be found in arid climates from Texas to Mexico. These cacti are popular in gardens and greenhouses due to their unique appearance, and are commonly used in landscaping for their drought-resistant properties. Overall, the Genus Echinocactus is an interesting and diverse group of plants with a variety of names.