The mounts of the Tlemcen region are part of the Algerian national forest heritage. These landscapes offer a very interesting biological and edaphic diversity. In these physiognomic landscapes the groupings to Chamaerops humilis occupy an important place. This study aims to highlight the edaphic requirements of Chamaerops humilis in the mounts of Traras; An integral part of the northern geomorphological structures of the Tlemcen region. To end in our expectations of the physico-chemical analyses on six samples of the ground were realized.. The latter highlight the granulometric and chemical composition on which Chamaerops humilis can develop. The results show that the texture that favors good growth of Chamaerops varies between silt and sandy loam. The chemical composition of the soils analyzed reveals the edaphic variability that favors this taxon to develop.

Our study is focused on the characterization of Chamaerops formations in the western of Algeria. It is based on a phytoecological approach. For this, we realized this work who aims primarily to inventory the species of Chamaeropaies in the mounts of Tlemcen, and classifying the species in biogeographic type and characterize their belonging biologic. Four representative stations of Chamaeropaies were selected. 120 floristic surveys were conducted using a minimum area of 100 m2. The survey of level different floristic performed according to the method of Braun Blanquet shows a rich vegetation of the study area with 248 species distributed in 38 families. On the biological plan 59% on average species are therophytes followed by chamaephytes with 21,75%, the hemicryptophytes is less represented with 10,25 %. Geophytes and phanerophytes remain most weakly represented with respectively 6,5% et 2,25%. On the biogeographical plan 35% of taxed, are of mediterranean origin, 8 % are West-Mediterranean, Paleo-Tempered and Circum- Mediterranean(5%), Eurasian, and European-Mediterranean are represented by 3 % for each. Globally the zone of study tends towards a therophytisation.

The area, on which our search is driven, is situated in the north west of Algeria, it an integral part of Traras Mountains. The present study focuses on Tetraclinis articulata groups in the coastal region of Honaine, province of Tlemcen (Western Algeria). To identify the biological potentials of Tetraclinis articulata groups, our study has been based on two methodological approaches: - The method of Braun-Blanquet which relies on abundance and dominance realized on the three search areas (Sidi Driss, Ouled Youcef and Ziatene). - The method of Durietz based on relative frequencies. The results achieved show the different species which accompany Tetraclinis articulata. The analysis of different inventories have allowed us to find out 80 vegetal species, the main of which are Tetraclinis articulata, Pistacia lentiscus, Globularia alypum, Cistus monspeliensis, Calycotome intermedia, Chamaerops humilis, Erica multiflora, Pistacia lentiscus, Echium vulgare… The second approach has allowed us to find out four classes from which we identify the species related to each class as concern: Lavandula dentata, Calycotome intermedia, Pistacia lentiscus, Globularia alypum, Cistus monspeliensis, Ulex europeus, Urginea maritima, Asteriscus maritimus, Schismus barbatus, Chamaerops humilis, Phillyrea angustifolia, Ampelodesma mauritanicum, Helianthemum pilosum et Vicia villosa.