Sapindus emarginatus, commonly known as the Soap Nut Tree or Reetha, is a deciduous tree belonging to the Sapindaceae family. It is native to tropical and subtropical regions of Asia, particularly found in India, Nepal, and parts of Southeast Asia.

The fruit is a round, fleshy drupe that is 2-5 cm in diameter. It contains a hard seed encased in a thin, soap-like outer layer. The fruit turns blackish-brown when mature and is harvested for its saponin content. Sapindus emarginatus is not currently considered threatened; however, sustainable harvesting practices are essential to maintain healthy populations in the wild.

Sapindus emarginatus is a valuable tree with numerous ecological and economic benefits. Its natural soap properties, coupled with its use in traditional medicine and crafts, make it an important species for sustainable practices in various cultures. Its ability to thrive in diverse environments further enhances its value in agroforestry and conservation efforts.