The term 'Tree of the Cashew Family' is referring to the SUMAC tree, which is a flowering plant in the family Anacardiaceae. It is a shrub or small tree that grows up to 5 meters tall and is native to the Middle East, East Africa, and North America. The leaves are usually compound and the flowers are small and greenish-white. The fruit is a red drupe containing a single seed. SUMAC is used in traditional medicine, as a spice, and for its dye properties.