Coriander, also known as cilantro in some regions, is a herbaceous plant native to regions spanning from southern Europe to southwestern Asia. It's widely cultivated for its aromatic leaves and seeds, both of which are used in various cuisines worldwide. The leaves are often used fresh as a garnish or ingredient, adding a fresh, citrusy flavor to dishes, while the seeds are dried and used as a spice, providing a warm, nutty flavor with hints of citrus and pepper.