The plant cover of the western macroslope of the Urals was studied by the researchers from the Institute of Biology of Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences since 1989. Investigations, that were carried out in the basin of the Unya river, Pechoro-Ilychsky biosphere reserve and national park «Yugyd va», allowed to obtain information on the structure, dynamics and species diversity for so far poorly studied fir (Abies sibirica) forests within the foothills and mountain zone of Northern and Subpolar Urals (Degteva, Dubrovskiy, 2014). Standard methods adopted in geobotany and forest typology (Ipatov, Mirin, 2008) were used, including Ipatov’s abundance scale for species in herb-dwarf shrub layer assess, at 79 sample plots of 400 m2 size. The data of 32 relevés kept in the phytocenarium of the Institute of Biology were taken into consideration. The level of α-diversity of vascular plants was assessed as a mean value of species number per plot. Ellenberg’s ecological scales (Degteva, Novakovskiy, 2012) adopted to the study area were used in assessing the relations of vegetation and main environmental factors (humidity, soil nutrition, soil acidity and illumination). Data processing was performed using the statistical packages SPSS and PC-ORD (McCune et. al., 2002). Coenoflora of fir forests of area in question includes 169 vascular plant species from 102 genera and 43 families. The leading families are Asteraceae and Poaceae. Species from 16 eco-coenotical groups are present in the coenoflora with 47.1 % belonging to "valley" eco-coenotical group and 29.7 % to taiga-forest one; 8 species are included into the Red Data Book of the Komi Republic.