Garcinia madruno (charichuelo) is a fruit-producing tree species from the rainforests of Central and South America. The leaves are dark green and leathery. The fruit looks like a shriveled droopy lemon, and has a similar rind. The interior is soft white pulp and has a popular, slightly citrusy taste people have compared to a sweet santol fruit or lemony cotton candy. The species was formerly included in the genus Rheedia, which has since been absorbed into Garcinia, as Rheedias species are now known as “new world mangosteens”. (source)