Article

The study contributes to the knowledge of distribution and expression of phytodiversity (floristic and taxonomic richness) ofthe mountain floras in Sub-Mediterranean and Mediterranean floristic regions. The comparison deals with mountain floras ofNorth Pirin ML (Bulgaria) and Madonie Mt. (Sicily). Analyses are made by assessing floristic richness from one hands and taxonomic structure at family and genera level from other of both local floras using U-test as statistic method. Biological (after Raunkiaer), ecological spectra and distribution of the taxa in altitude are confronted and main trends are pointed out. Comparison of the geographical distribution of the species of the two floras is made by separate analysis of the different geoelements and special attention is paid to the endemie species.