Kusum oil is a type of oil extracted from the seed of the Kusum tree (Schleichera oleosa). The plant, which is also commonly known as Ceylon oak, lac tree, or Macassar oiltree,[1] belongs to the family Sapindaceae. The sapindaceae family is named after J. C. Schleicher, a Swiss botanist, and the species name means "oily"[2] or "rich in oil." The tree is native to South Asia, but is also found in some parts of Southeast Asia.