Its unique flavor comes from bergamot. Bergamot is a citrus fruit that comes from the Citrus bergamia plant. Commonly grown in the Mediterranean, it is the size of an orange and its coloring ranges from green to yellow. There is a lot of speculation about how the flavor was discovered. My favorite story was how the flavors infused by accident when a container of tea and bergamot oranges were shipped together from Chinese diplomats to an Earl Grey.