The work analyzes the bottom and lithophilic vegetation of coastal cliffs of the Abrau Peninsula within the Abraussky Natural-Historical Reserve and its eastern border. Extreme unevenness in the distribution of phytocenoses was noted, associated with the relief heterogeneity. Landscape profiling was carried out with a detailed description of transects, which made it possible to assess features of the spatial distribution of plant communities on abrasion-accumulative banks. 70 species of vascular plants and 17 species of algae were found, including 15 endemics, 27 species included in the Red Data Book of the Krasnodar region, and 9 species from the Red Data Book of the Russian Federation. An analysis was carried out for the purity of coastal waters using saprobity coefficient (1.94) and Cheney’s coefficient (1.42). The environmental protection coefficient (16.4) was calculated. Measures are proposed to optimize the environmental regime of the nature reserve.