Gracinia atroviridis Griff. ex T.Anderson, Fl. Brit. India 1: 266 (1874)
Species name meaning 'dark green', referring to the leaves?
The Asam Geluger tree grows to a height of more than 20 m and has a long trunk, smooth grey bark
and drooping branches. The leaves are dark green, shiny, long and narrow with a pointed tip and
upturned edges. The flowers are dark red. The round fruits are borne singly on twig ends about
7-10 cm in diameter. The ripe fruits are bright orange yellow and ridged.
Tree, up to 20 m tall, with white to yellow sap. Stipules absent. Leaves opposite, with petiole
clasping around the twig. Leaves elliptic, venetion unclear, with resin canals when held against
the light. Flowers in dense clusters, usually with just a few flowers, flowers red coloured. Fruits
yellow-orange when ripe, ca. 7-10 mm diameter, with longitudinal ridges.
In evergreen forests. Commonly found in evergreen forests in the southern region of Thailand
Sun-dried slices of the fruits, locally known as "asam keping", are commercially available and
are popularly used as a vegetable salad and is considered extremely sour. The fruit is sliced,
dried then stewed and used as a common ingredient in Asian dishes such as curries and soups.
Used frequently in Thai medicine as an acidic fruit for reducing weight and excess fat by
stopping the glycogen process (thereby converting fat to energy).
This species grows wild throughout peninsular Malaysia and southern Thailand but is also widely
cultivated, especially in the northern states, owing to its economic and medicinal value.
Malaysia: Asem gelugo, Asem gelugur, Asem keping.