Frangula
Synonyms
Frangula alnus
Frangula purshiana
Frangula purshianas
Frangulas
Rhammus frangula
Rhammus frangulas
Rhammus purshiana
Rhammus purshianas
frangulas, Rhammus
purshiana, Frangula
purshianas, Rhammus
A plant genus of the family RHAMNACEAE. This genus is often called buckthorn but should not be confused with other plants called that such as HIPPOPHAE or KARWINSKIA. Some RHAMNUS species have been reclassified into this genus. F. purshiana bark is cascara sagrada (CASCARA). Members contain emodine, frangulanin, frangulin, and anthraquinones such as EMODIN.