A phytosociological survey was carried out on the right bank of the Iški vintgar river gorge. A total of 24 relevés were recorded according to the standard Central European phytosociological method. The following associations were identified: Hacquetio-Fagetum Ž. Košir ex. Horvat et al. 1974, Ostryo-Fagetum M. Wraber ex. Trinajstić 1972, Querco-Ostryetum carpini-foliae Horvat 1938. The site conditions were described in detail. An analysis of site factors based on Ellenberg's phytosociological indicator values revealed that light, temperature and soil nutrients are the most important ecological factors. The sites are generally quite moist, but also have a strong thermophilic character. It was found that there are no beech forests in the most exposed sites. In these areas, the association Querco-Ostryetum carpinifoliae was described by Horvat in 1938. Beech forests grow on richer sites. The vegetation observed is comparable to that on the left bank of the gorge. It was found that the species diversity on the right bank is lower than on the left bank, especially in the association Hacquetio-Fagetum Ž. Košir ex. Horvat et al. 1974.
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