Herbarium collection of the Institute of Ecology of the Volga basin of the Russian Academy of Sciences (PVB): results of the 2021 field season

In the article, the author sum up the results of the 2021 field season. The research was held by the laboratories of phytodiversity and phytocenology of the Institute of Ecology of the Volga River Basin of the Russian Academy of Sciences, and replenished the herbarium collection (PVB). The total number of collections of vascular plants per year was about 920 herbarium sheets from the territories of four regions: Samara, Penza, Ulyanovsk and Saratov. Specific research locations and the number of encountered species are indicated.