Melilotus indicus

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. In Australia and New Zealand, where it is naturalised, it is sometimes called King Island melilot or King Island clover....read more on Wikipedia.