In this paper, vegetation were studied with Anglo-American approach in Ghamisheleh Marivan. In this approach, vegetation samples which could be defined as plant species by their distribution, could be considered as groups. Systematic-random sampling with 76 plots and 256 m2 in area, was selected. Combined methods of cluster analysis, two way indicator species analysis and similarity indices were used for the determination of ecological species groups. The results of this study showed that there are 6 ecological species groups in the region. Indicator species of these groups are:
Quercus libani, Quercus infectoria, Pyrus syriaca, Pistacia atlantica, Trifolium campestre and Teucrium polium.