Plant cilantro seeds to harvest both a herb and spice. This annual herb is known officially as coriander just about everywhere outside of the Americas. We often think of the fresh leaves as cilantro, and the seeds (which are very easy to harvest) as coriander. Cilantro is the Spanish name for coriander. The plant is native to North Africa and Mediterranean Europe, and is a member of the carrot family, Apiaceae. Its close relatives include parsley, fennel, and dill, which is easy to see when the plant flowers, producing tall umbels of white flowers.