Antidesma acidum

About

Antidesma acidum is a shrub or small tree that is native to an area from Java to Southwestern China and Pakistan. It is a long-lived, shade-tolerant species that is usually found under closed-canopy. The fruit is eaten in many places, the leaves in some locations. In Luang Prabang (Laos) open-air markets, the leaves are only sold alongside Russula mushrooms, to give a sour flavour to soup made from the fungi.

Summary from Wikipedia