Abstract
The area of Algerian western north already subjected to a strong climatic rigour and an excessive anthropic activity for several decades, has been confronted with the threats of the alarming degradation of its natural resources, following the example Pistacia atlantica which occupies today only one quite thin proportion of the territory.
The study method was based on the phytoecological approach on a very large scale by approaching the anatomical and biometric study of the leaves of Pistacia atlantica in order to identify and confirm the name of the subspecies.
The analysis of the results obtained revealed that this subspeciesis atlantica, phenotypically very variable.