|Buah Ma or Buah Pulasan.|
The fruit that can be "opened" by twisting the skin looks like rambutans, a more common fruit in Sarawak.
The pulasan (Nephelium mutabile Blume) is often confused with the rambutan. The Ibans call this fruit Buah Ma (with a k at the end). It is called pulasan in English, Spanish and Malay . In Indonesia it is called kapulasan. It is not known outside South East Asia.
Good variety of pulasan is very favoured and garners a higher price than the rambutan.