High Quality Content by WIKIPEDIA articles! Cinnamomum cassia, called Chinese cassia or Chinese cinnamon, is an evergreen tree native to southern China, Bangladesh, India, and Vietnam. It is one of several species of Cinnamomum that are used primarily for their aromatic bark, which is used as a spice. In the United States of America, Chinese cassia is often sold under the culinary name of "cinnamon". The buds are also used as a spice, especially in India, and were once used by the ancient Romans.