The Purple Mangosteen Garcinia mangostana), colloquially known simply as "the mangosteen", is a tropical evergreen tree, believed to have originated in the Sunda Islands and the Moluccas of Indonesia. The tree grows from 7 to 25 m (20–80 ft) tall. The rind (exocarp) of the edible fruit is deep reddish purple when ripe. Botanically an aril, the fragrant edible flesh can be described as sweet and tangy, citrusy with peach flavor and texture.

     The Purple Mangosteen belongs to the same genus as the other — less widely known — mangosteens, such as the Button Mangosteen (G. prainiana) or the Lemondrop Mangosteen (G. madruno). Botanically, they are not related to the mango (Mangifera spp.), which belongs to the Anacardiaceae plant family.

     Mangosteen is sometimes known as "The Queen of fruits" in parts of southeast Asia, notably Singapore and Malaysia. It is believed to have "cooling" properties that counteract the "heat" of durians, the so-called "King of fruits".

Ref. http://th.wikipedia.org/wiki/mangosteen