Sapindus mukorossi, commonly known as Indian soapberry, washnut, ritha or Chinese soapberry, is a species of tree in the family Sapindaceae. It is a deciduous tree that grows in the lower foothills and midhills of the Himalayas at altitudes of up to 1,200 metres (4,000 ft). It is also native to western coastal Karnataka, Maharashtra, and Goa in India; as well as Nepal Indochina, southern China, Japan and Taiwan as known by its many indigenous peoples. It is tolerant to reasonably poor soil, can be planted around farmers' homes, and one tree can produce 30 to 35 kilograms of fruit per year.