|From Koehler's Medicinal-Plants (1887)|
Cinnamomum cassia, called Chinese cassia or Chinese cinnamon, is an evergreen tree originating in southern China, and widely cultivated there and elsewhere in South and Southeast Asia (India, Indonesia, Laos, Malaysia, Thailand, and Vietnam). It is one of several species of Cinnamomum used primarily for their aromatic bark, which is used as a spice. The buds are also used as a spice, especially in India, and were once used by the ancient Romans.
The tree grows to 10–15 m (33–49 ft) tall, with greyish bark and hard, elongated leaves that are 10–15 cm (3.9–5.9 in) long and have a decidedly reddish colour when young.