The pharmacognosy of the Aspidosperma barks of British Guiana.  IV.  Quantitative numerical studies of the lignified elements in cascara and in Aspidosperma species.
D030009:Aspidosperma; D002400:Cathartics; D006172:Guyana; D010598:Pharmacognosy; D010944:Plants; D031955:Rhamnus
D002400:Cathartics
CATHARTICS; PLANTS