The aim of this research project was to provide a thorough and comprehensive analysis of ethnobotanical and floristic investigations of medicinal and food-based plants. The study was based on a collection of data on food and therapeutical uses among the people of Zerhoun area.A series of ethnobotanical surveys were carried out in the field for three months long(from April to June 2014). The research endeavourended up by the identification of samples in the field and in the laboratory.Scrutiny of these samples resulted in identifying three species: Cactus (OpontiaficusindicaL.Mill.), Carob (CeratoniasiliquaL.) and Caper (CapparisspinosaL.).Using computer processing, the results showed that the most used plants in the region were found to be: the Cactus, then Carob and finally the Caper. These plants arefamousasfood plants, therapeutic and commercial advantages
