Cinnamomum verum, called "true cinnamon tree" or Ceylon cinnamon tree is a small evergreen tree belonging to the family Lauraceae, native to Sri Lanka. Among other species, its inner bark is used to make cinnamon.

The old botanical synonym for the tree—Cinnamomum zeylanicum—is derived from Sri Lanka's former name, Ceylon. Sri Lanka still produces 80–90% of the world's supply of Cinnamomum verum, and it is also cultivated on a commercial scale in Seychelles and Madagascar.

Cinnamomum verum trees are 10–15 metres (32.8–49.2 feet) tall. The leaves are ovate-oblong in shape, 7–18 cm (2.75–7.1 inches) long. The flowers, which are arranged in panicles, have a greenish color, and have a distinct odor. The fruit is a purple 1-cm drupe containing a single seed.