The study is to define the phytosociological units in which the formations of djebel Medjounes, to specify their floristic affinities with the groups that are close to them and their positions in the dynamic series of the region and finally to determine climatic conditions and edaphic in which they develop. The methodology used is called "phytosociological" or "sigmatist". This allowed individualization of thirteen associations and three under associations. These associations are arranged as follows: class of the Ilicis Quercetea with an integrated association in the Order of Quercetalia ilicis and the Alliance of Quercion ilicis, four associations integrated in the Order of Pistacian-Rhamnetalia and the Alliance of Genisto tricuspidatae- Calicotomion spinosi; Class of the Rosmarinetea officinalis with a single association comes to the Order of the Erinaceetalia anthyllidis and the Alliance of the Algerian Cast Understanding, two associations related to the Order of Cisto mauritanici-Thymetalia munbyani and the Alliance Genisto atlanticae- Cistion Villosi; Class of the Lygeo-Stipetea with an association belonging to the Order of Lygeo-stipetalia and the Alliance Stipo-launaiaon Acanthocladae, two associations adhering to the Noaeo mucronatae-Artemision, an association being at the Alliance Artemisia Herba-alba Asso and Plantago lagopus; An association with alliances in Artemisia herba-alba Asso and Poa Bulbos; Class of Tubererarierea guttatae marked by an associations related to the order of Brachypodietalia (Trachynietalia) Distachyae and the Thero-brachypodion.

The study is to define the phytosociological units in which the formations of djebel Medjounes, to specify their floristic affinities with the groups that are close to them and their positions in the dynamic series of the region and finally to determine climatic conditions and edaphic in which they develop. The methodology used is called "phytosociological" or "sigmatist". This allowed individualization of thirteen associations and three under associations. These associations are arranged as follows: class of the Ilicis Quercetea with an integrated association in the Order of Quercetalia ilicis and the Alliance of Quercion ilicis, four associations integrated in the Order of Pistacian-Rhamnetalia and the Alliance of Genisto tricuspidatae- Calicotomion spinosi; Class of the Rosmarinetea officinalis with a single association comes to the Order of the Erinaceetalia anthyllidis and the Alliance of the Algerian Cast Understanding, two associations related to the Order of Cisto mauritanici-Thymetalia munbyani and the Alliance Genisto atlanticae- Cistion Villosi; Class of the Lygeo-Stipetea with an association belonging to the Order of Lygeo-stipetalia and the Alliance Stipo-launaiaon Acanthocladae, two associations adhering to the Noaeo mucronatae-Artemision, an association being at the Alliance Artemisia Herba-alba Asso and Plantago lagopus; An association with alliances in Artemisia herba-alba Asso and Poa Bulbos; Class of Tubererarierea guttatae marked by an associations related to the order of Brachypodietalia (Trachynietalia) Distachyae and the Thero-brachypodion.