Abstract
<jats:p>This study is relevant due to the fact that as a result of human economic activity, in the Romen River basin in the territory of the Romen district of the Sumy region, the habitats of many species of higher vascular plants were destroyed, especially those that were biotopically tied to meadows and swamps. The purpose of the article is to obtain scientific information about the current state of natural vegetation and flora of the Romen River basin within the territory of the Romen district of the Sumy region, as well as to identify populations of rare species of higher vascular plants in this territory. The methodology for studying the phytodiversity of the territory of the Romen River basin within the territory of the Romen district of the Sumy region is based on the application of theoretical and practical methods. Theoretical methods included the analysis of literary sources with their subsequent systematization and generalization. Practical methods included field research and office data processing. Field research was conducted during 2019–2023 and the route-diagnostic method was used as the main method. The results of the study showed that the phytocenotic diversity of the study area is represented by groups of oak, ash, linden and pine forests, poplar and willow copses, shrubs, meadows, swamps and aquatic vegetation. 356 species of higher vascular plants were identified, which belong to 4 divisions, 5 classes, 54 orders, 73 families. A systematic analysis of the flora of the Romain River basin showed that the largest number of species belongs to such families as – Asteraceae, Asteraceae, Rosaceae, Labiatae, Umbelliferae. In this area, the largest number of species is found in meadow groups, followed by forest and wetland groups. The smallest number of species is characteristic of aquatic plant groups. Practical implications. Taking into account the rich biological diversity of the territory of the Romain River valley. Romen it is necessary to carry out work aimed at restoring the hydrological regime in the area of the villages of Zayzd, Vedmezhe, Mykolaivka and Rohyntsi, primarily by ensuring the regulation of the outflow of species from the melioration canals to the riverbed. Value/originality. For the first time, the natural vegetation and flora of higher vascular plants of the Romen River basin within the Romen district of Sumy region were studied. The places of growth were identified and the current state of populations of species of higher vascular plants that require special protection and are listed in the Red Book of Ukraine and the Official List of Regionally Rare Plant Species of Sumy region was studied.</jats:p>