Definition: 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.
note X refs: RHAMNUS is also available; coord with specific PLANT STRUCTURES term if pertinent; for use in therapy coord IM with PHYTOTHERAPY (IM) + disease/drug ther (IM) + PLANT PREPARATIONS or its indentations/ther use (IM or NIM) + specific plant che
