Dirca is a genus of flowering plants in the family Thymelaeaceae. It is commonly known as leatherwood and consists of several species, primarily found in North America. These plants are characterized by their woody stems and leathery leaves, which give them their common name. The flowers of Dirca are small and typically yellow, appearing in clusters during the spring. They are often pollinated by insects. The plants thrive in moist, shaded environments, such as forests, and are valued for their ornamental qualities in gardens and landscapes.