Boscia albitrunca

Boscia albitrunca, commonly known as the shepherd tree or shepherd's tree (Afrikaans: Witgat, Sotho: Mohlôpi, Tswana: Motlôpi, Venda: Muvhombwe, Xhosa: Umgqomogqomo, Zulu: Umvithi), is a protected species of South African tree in the caper family. It is known for having the deepest known root structure of any plant at: -68 metres (223 ft). The species epithet "albitrunca" refers to the white trunk it oftentimes develops. Traditionally, the shepherd tree was used by Dutch settlers, boers, to create a variant of coffee from the roots of the tree. It is an evergreen tree native to southern and tropical Africa, living in the hot, dry, and often seasonally brackish low-lying areas, sometimes on abundant lime or occasionally on rocky terrain. It is a common tree of the Kalahari, bushveld and lowveld. It is one of the most important animal forage trees in the Kalahari....read more on Wikipedia.