Cinnamon is a kind of spice obtained from the inner bark of several species of trees of the genus Cinnamomum that is used for sweet and savory dishes . Although cinnamon is sometimes regarded as " true cinnamon " , most of cinnamon bark in the international trade of other species nearby , which is also called " cassia " to distinguish it from the " true cinnamon " . Cinnamon is the name for a dozen species of trees and herbs commercial product produced by the partial pepophan . Everything belonging to the genus Cinnamomum in the family Lauraceae . Only a few of these species are grown to be sold as a spice .