Etude phytoecologique et invantaire florstique de Chaab Z’rayeb de Sahara Septentrional Algerien -cas de la commune de Metlili -

Abstract

his work is a phytoecological study to determine the plants that grow in the Shaab Z'rayeb has Metlili (wilaya of Ghardaia) northern Sahara and see its floristic diversity, this study was conducted during the winter and spring seasons. To facilitate quantitative studies in each season must be sampled station of 100 m2 in which we applied the different floristic, from which have been determined. The number of species inventories of 20 spread over 13 families whose most representative is The Asteraceae. Among these species, 17 are alive and 03 are ephemeral. The common species between the winter and spring seasons are Resedavillosa, Piturantuschloranthus, Pergulariatomentosa .By against species that characterize winter are Atractylisaristata, Salsolavermiculata, while in the spring season we found Nolletiachrysocomoides, Thymeleamicrophylla