Garcinia xanthochymus, the false mangosteen, gamboge, yellow mangosteen, Himalayan Garcinia, or sour mangosteen is a species of mangosteens found from India, southern China, and Japan through Indochina to Peninsular Malaysia at elevations of 0 â 1400 meters. Plants are found growing in humid forests of valleys or on hills. It is locally known as defol (à ¦¡à §Âà ¦«à ¦²) in Bengal, tepor tenga (à ¦Âà §Âà ¦ªà §° à ¦Âà §Âà ¦Âà ¦¾) in Assam, and heirangoi (à ¦¹à §Âà ¦°à ¦¾à ¦Âà ¦Âà §Âà ¦Â) in Manipur.
Tree growing up to 8âÂÂ15 meters with gray brown bark. Leaves are oblong to lanceolate, 15.4-30.5 cm x (4-)6âÂÂ12 cm. Petioles are robust 1.5-2.5 cm long. Flowers are greenish white, monoecious in a dense cluster of 4âÂÂ10 with a diameter of 1.3 cm. Fruits are yellow 5 cm to 8.9 cm in diameter containing yellow flesh and around 5 seeds. Seeds are oblong or ovoid and brown. Plants bloom from March to May with fruits forming around August to November.