Coriander is an annual herb that belongs to the carrot family. All parts of this plant are used in cooking. The leaves, known as Cilantro, are used in Middle Eastern and Mexican cooking. The roots are used in Thai recipes and the seeds are used both in their whole, cracked form or ground form. The seeds are reminiscent of orange peel and is the portion referred to as Coriander, the cracked and ground seeds are essential ingredients in curries.