This plant belongs to the small family of cacti known as Echinocactus which it shares with five other plants. Its full name is ECHINOCACTUS GRUSONII meaning a spiny plant.
It is by far the most reliable growing plant in this family and most spectacular thus it has become the stock plant in any dry garden display or potted plant feature arrangement.
The term barrel cactus (barrel cacti) is often used in reference to this plant but this is a generic term that includes the other large spherical/ovoid family known as Ferocactus. Ferocactus are generally more demanding to grow especially in humid or coastal areas.
The words cacti and cactus are often interused both as singular and plural. Cactuses is sometimes used as plural.
The botanical names of the family is Cactaceae.
It is known under many popular names such as: