The Jerusalem artichoke (Helianthus tuberosus), also called sunroot, sunchoke, wild sunflower,[3]topinambur,[3] or earth apple, is a species of sunflower native to central North America.[4][5] It is cultivated widely across the temperate zone for its tuber, which is used as a root vegetable.[6]
^"Helianthus tuberosus". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 26 April 2019.