Cinnamomum Zeylanicum or Real Cinnamon, is the inner bark of a small evergreen tree indigenous to Sri Lanka (Ceylon). Ceylon Cinnamon and Sri Lanka's affinity is so strong that the very botanical name of the spice - Cinnamomum Zeylanicum is derived from the island's former name, Ceylon...
Coumarin is a flavoring which is found in high concentrations in "Cassia" .Relatively small amounts of Coumarin can damage the liver of particularly sensitive individuals.