... substance called hydroxycitric acid / HCA, a principle extract of Garcinia cambogia. Garcinia is a source for ... Description : Garcinia cambogia is a moderate-sized, evergreen tree and the flowers are unisexual, sessile and axillary. ... the gum-resin incisions are made into the tree, or a large slice is pared from the ... dried in the sun. If left on the tree, it speedily concretes into dry tears or ...