Cascara, also known as Cascara Buckthorn and Bearberry (Rhamnus Purshiana) is a small tree in the Buckthorn Family (Rhamnaceae). It’s native to western North America, blooms May-Jun and grows 15-30 ft. It’s commonly found in the understory of taller trees in forests and savannas; likes moist to dry soils and partial shade to partial sun exposure.
Cascara can also be found at full sun exposure growing taller and wider. The dried bark was and may still be use as a laxative by Native Americans. Laxative properties of this tree made it a target causing a drop in population numbers. It’s commonly planted in the restoration of forests, streams and wetland edges.