Botanical name: Hoodia sp.
Common name: Hoodia
Family: Apocynaceae (Formerly:Asclepiadaceae)
Subfamily: Asclepiadoideae
Origin: South Africa
USDA Plant Hardiness Zone Map
Hoodia is stem succulent, described as "cactiform" because of its remarkable similarity to the unrelated cactus family.
Several species are grown as garden plants, and one species, Hoodia gordonii, is being investigated for use as an appetite suppressant.
Link to this plant:
https://toptropicals.com/catalog/uid/hoodia_sp.htm