Melilotus indicus, sometimes incorrectly written Melilotus indica, is a yellow-flowered herb native to northern Africa, Europe and Asia, but naturalized throughout the rest of the world.Common names in English include sweet clover (or sweet-clover), sour clover (sour-clover, sourclover), Indian sweet-clover, annual yellow sweetclover, Bokhara clover, small-flowered sweet clover, common melilot, small-flowered melilot, small melilot, sweet melilot, Californian lucerne and Hexham scent.