Hoodia gordonii, is a leafless spiny succulent plant (not a cactus) with fleshly

finger-like stems. Rows of thorns are present along the stems, bearing flesh colored flowers. The strong smell of decaying meat, attract flies to the flowers and by laying their eggs inside, they pollinate them.
Hoodia gordonii contains an (when extracted, patented molecule) active ingredient,
P57.
Hoodia reduces the appetite by fooling the brain into thinking that it has eaten and sending the signals to the body that it is full. This results in smaller portions and curbing of appetite in general.
Hoodia species occur in summer rainfall areas in Angola, Botswana, Namibia, and South Africa as well as winter rainfall areas in Namibia (MET 2002). Only one species if found east of 26 degrees longitude, i.e. H. currorii subsp. lugardii, which occurs in Botswana and the Limpopo province of South Africa. The centers of diversity for
Hoodia are in Namibia (11 taxa) and South Africa (9 taxa).
Although the genus
Hoodia is widespread in Southern Africa, herbarium records indicate that
Hoodia gordonii only occurs in South Africa and Namibia. ***Any claims about other areas of
Hoodia gordonii distribution should be verified by a competent taxonomist.