Cascara Sagrada
Image: George Kral (cc-by-nc)
NameCascara Sagrada
Scientific NameFrangula purshiana
Common NamesCascara Sagrada, Cascara Buckthorn, California Buckthorn, Rhamnus purshiana
Plant FamilyRhamnaceae
Natural HabitatTypically found in moist woodlands, riparian zones, along stream banks, and in well-drained soils, often in partial shade to full sun, across western North America.
Parts Usedbark
Medicinal Actions
Traditional UsesTraditionally, the aged and dried bark of Cascara Sagrada has been used as a powerful stimulant laxative to relieve chronic constipation. It was also historically employed by indigenous peoples for various digestive complaints.
Active ConstituentsAnthraquinone glycosides, Cascarosides A, B, C, D, Aloe-emodin, Chrysophanol
Preparation Methodsdecoction,tincture,powder
Contraindications & WarningsNot recommended for long-term use due to potential for electrolyte imbalance, abdominal cramping, and dependence. Contraindicated in cases of intestinal obstruction, inflammatory bowel disease (e.g., Crohn's disease, ulcerative colitis), appendicitis, and during pregnancy or lactation.
Cultivation NotesPrefers moist, well-drained soil and can tolerate a range of light conditions from partial shade to full sun. It is a relatively hardy plant native to its region.
Raritycommon
Description
Cascara Sagrada is a deciduous shrub or small tree native to western North America, characterized by its simple, alternate, ovate to elliptical leaves with prominent parallel veins. It produces small, greenish-yellow flowers in clusters, followed by dark berries.
