The ethnobotanical potentials of Chamaerops humilis in the Béni Snous region (south-west of Tlemcen, western Algeria) has been studied to know the therapeutic utilities and the practices of the local populations, in order to valorize this resource. A series of ethnobotanical surveys were carried out using a questionnaire on the 3 municipalities of Beni Snous (Beni Bahdel, Azail, and Beni Snous). The frequency of use of Chamaerops humilis in the region of study is closely related to the profile of the investigated people. The results of this study reveal that Chamaerops humilis parts are used for therapeutic purposes by the local population: the heart of stipe as to treat dyspepsia (gastrointestinal attacks, 93.90%), fruits as an antiseptic (70.73%), roots for anemia (36.55%) and intestinal worms (30.10%), while the leaves are often used to treat diabetes (21.62%) and other gastrointestinal disorders (30.1%).

Of the four national hunting reserves in Algeria, the Mounts of Tlemcen Moutas reserve http://reservebio-tlm.com, characterized by a large area, reliefs and a specific climate, implies significant floristic and faunistic richness. Currently, the coexistence of species, such as Quercus faginea subsp. tlemcenensis (DC.) M., Lonicera implexa L., Ruscus aculeatus L., indicates a forest dominant ecological atmosphere, although the region has experienced repeated fires during the 90's. In this research, a phytoecologicaland syntaxonomical analysis is obvious. More than 300 species have been inventoried and indexed in more than 70 families and this shows the importance of phyto-diversity of the studiedregion. In the analysis of the phyto-ecological parameters, we could notice a regression of the vegetal cover in its diversity.

Contribution à l'étude de la thérophytisation des matorrals des versants sud des monts de Tlemcen (Algérie occidentale) 161 ÍNDICE forest-matorral-lawn. More than 3/4 of species found in the study area belong to therophytes and hemicryptophytes.

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