Coriander is an annual herb in the family Apiaceae. It is also known as dhania or cilantro . All parts of the plant are edible, but the fresh leaves and the dried seeds (which are both a herb and a spice) are the parts most traditionally used in cooking. Most people perceive coriander as having a tart, lemon/lime taste, but to nearly a quarter of those surveyed, the leaves taste like dish soap, linked to a gene that detects some specific aldehydes that can produce soapy sensation from the odorant substances.