NEW DATA ON THE DISTRIBUTION OF RARE AND PROTECTED SPECIES OF VASCULAR PLANTS IN THE LENINGRAD REGION AND SAINT PETERSBURG

Abstract

New information is given on the habitats, distribution, population status and dynamics of 9 rare vascular plant species. The material was collected through floristic surveys carried out by the author in the Leningrad Region and St. Petersburg, mainly in 2018-2020. One of the species ( Dactylorhiza baltica ) is listed in the Red Data Book of the Russian Federation, three species ( Alisma gramineum, A. juzepczukii, Persicaria mitis ) are red-listed in Saint Petersburg, and two species ( Carex arenaria, Viola persicifolia ) are red-listed in the Leningrad Region. Most of the rare species records were made in the Zapadnyi Kotlin Nature Reserve. In addition, the article presents new information on rare alien species - Ambrosia artemisiifolia, Bidens frondosa, and Erigeron annuus . The invasive status of Bidens frondosa and the dynamics of its distribution in the region are discussed.