Canellas, winter's-bark, and allies is distinguished by its aromatic, evergreen trees found primarily in tropical regions. These trees are notable for their simple, leathery leaves and small, clustered flowers, often with a spicy fragrance. The bark of canellas, winter's-bark, and allies is typically smooth and features a significant amount of essential oils, which play a crucial role in the plant's defense mechanisms against pests and diseases. The unique chemistry of the oils is also integral to its adaptation to humid, tropical climates.