Hoodia gordonii

About

Hoodia gordonii, also known as Bushman's hat, is a leafless spiny succulent plant claimed to have therapeutic properties in folk medicine. It grows naturally in Botswana, South Africa and Namibia. The species became internationally known and threatened by collectors, after a marketing campaign falsely claimed that it was an appetite suppressant for weight loss. The flowers smell like rotten meat and are pollinated mainly by flies. The indigenous San people of the Namib desert call this plant ǁhoba.

Summary from Wikipedia