(5) surface transects consisting of 47 samples collected from the northern and southern slopes of the Col de Navafría in Sierra de Guadarrama (Madrid, Spain) pass through several zonal and non-zonal ecosystems. Pollen analysis of each placeau makes it possible to establish the relationship between current pollen rain and vegetation. (6) the results of this analysis are presented in the form of a relative frequency diagram to highlight the different plant formations. (7) in order to clarify the relationship between pollen and vegetation and the significance of particular spectra, a number of statistical methods have been used: main Component Analysis (FPA), analysis of pollinic taxonomic diversity, variance between spectra and automatic zonation. Thus, the ACP shows that 61 % of the variance is explained by the pollination expression of taxa, and to a lesser extent by the importance of tree cover and the vegetation existing in the immediate vicinity of the sample. (8) considering that a current spectrum does not always represent the actual existing vegetation, the interpretation of a fossil spectra diagram will have to take into account the factors that leave the pollinian-vegetation rainy relationship.