Coriander and cilantro come from the same plant whose Latin name is Coriandrum sativum. The name of the herb can vary from region to region, but cilantro generally refers to the plant’s leaves and stems. Coriander, on the other hand, is more variable but often refers to the seeds of the Coriandrum sativum plant. When it gets confusing is in regions where cilantro is coriander, and coriander is then referred to as coriander seeds.