The Priazovsky Reserve is located in the Kuban River Delta (Krasnodar Region, Slavyansk District, Kuban-Priazovskaya Lowland). Based on the latest published data, 447 species of vascular plants have been recorded within the reserve. Research conducted in 2024–2025 identified 61 new species. Currently, the reserve's flora includes 508 species, 22 of which are protected and 28 are alien.

This paper analyzes existing views on the floristic zoning of Dagestan. It demonstrates the evolution of botanists' understanding of the concepts of "floristic region," "floristic district," and "floristic province." Existing logical contradictions in the process of subdividing the concept of "floristic region" are discussed. The need for introducing generally accepted criteria for integrating regional units of detailed floristic zoning into the generally accepted system of higher units of terrestrial floristic zoning is substantiated. A revision of existing floristic zoning units in Dagestan has been conducted, and four districts and twelve regions have been identified based on unified principles. These regions are included in the existing hierarchical system of higher-ranking units – I n two provinces: Dagestan and Turan.

This paper presents information on floristic finds in the Chechen Republic, identified during fieldwork in 2024 and 2025. Eight new species are reported for the region's flora for the first time: Cephalaria daghestanica, Cirsium argillosum, Onobrychis bobrovii, Pimpinella rhodantha, Psathyrostachys rupestris, Reynoutria japonica, Salvia beckeri, and Tanacetum leptophyllum. New locations have been identified for two species previously known only from isolated locations (Artemisia daghestanica and Astragalus salatavicus). Among the identified species, Psathyrostachys rupestris was considered a local endemic to the flora of Dagestan and is listed in the Red Data Book of the Russian Federation, while the other, Reynoutria japonica, is alien. For each species, a brief description of the habitat is provided.

The lichen flora of the Chechen Republic has been supplemented with new species and new locations of epiphytic and epixilic lichens. In 2025, surveys were conducted in the south of the Shatoyskiy District, on the northern macroslope of the Greater Caucasus, at altitudes ranging from 850 to 1550 m above sea level, in the least transformed mountain forest communities, within the former boundaries of the Sovetsky Federal Nature Reserve. The material was collected in beech and beech-hornbeam forests, sparse forests of the «shiblyak» type, poly-dominant forests of wet gullies, and in riparian small-leaved forests and shrubby thickets. According to the results of the 2025 expedition and the processing of the 2019 collections from the Nozhay-Yurtovskiy District, 30 lichen species were identified, including 5 new species from the genera Cetrelia, Collema, Lecania, and Leptogium. The presence of Heterodermia speciosa, Lecanora allophana, Ramalina farinacea, Peltigera praetextata, Pyrenula nitida etc. far in the republic has been confirmed.

A unique population of Rhododendron ponticum L. has been discovered in the Sochi National Park in Western Transcaucasia. Among the typically purple and lilac-violet-colored specimens, a compact group of plants of different ages with white flowers grows over an area of 0.3 hectares. Information is provided on the biotope, the number of white-flowered specimens and the species composition of the surrounding vegetation. A comparison was made with the flower colours of all species and notospecies of the genus growing in the Caucasus ecoregion.identifying species and a map of distribution in Russia and adjacent regions are given

Based on field collections in 2023–2025, 18 species and 3 genera (Abrothallus, Hypotrachyna and Sclerococcum) were identified as new to the lichen flora of Stavropol Territory. Five of these species — Chaenotheca hispidula, C. phaeocephala, Lecidea sarcogynoides, Leptogium brebissonii and Sclerococcum saxatile — are new to the Central Caucasus. The ecological peculiarities of the species and their distribution in the North Caucasus are provided. These findings are of significant botanical and geographical interest, adding to our knowledge of species distribution in the Caucasus.

This article presents the results of a study examining the variability of sweet potato (Ipomoea batatas L.) morphological traits depending on growing conditions and weight fractions. A comparative analysis of data for open (OG) and protected (CG) cultivation revealed that yield structure (weight fractions) is virtually independent of cultivation conditions. Tubers weighing 100 to 300 g provide the greatest contribution to overall yield. Data are presented on significantly smaller sizes and weights of sweet potato tubers harvested in the highlands of Dagestan, indicating a strong influence of climatic factors on growth processes. Lowland Dagestan offers the most suitable climatic conditions for sweet potato cultivation. The results confirm that sweet potato is a highly productive and flexible crop; however, the realization of its yield potential is directly dependent on agroclimatic conditions.