Cascara Buckthorn

Cascara buckthorn is a deciduous tree or large shrub native to moist forests, streambanks, and riparian areas of the Pacific Northwest and northern California. It typically grows 15–30 feet tall, with smooth gray bark, deeply-ridged oval leaves, and inconspicuous greenish-yellow flowers that bloom in spring. By late summer, it produces clusters of black, berry-like drupes that are eaten by birds and mammals, aiding in seed dispersal. In autumn, the leaves turn bright orange to yellow. Ecologically, cascara is an important understory species that supports wildlife and contributes to riparian forest diversity. Its bark has long been used medicinally, and it tolerates sun, shade, wet, and drought, making it both culturally and ecologically significant. Its small stature makes it an excellent tree for yards and gardens.