Floristic findings in Sakhalin Island (Russian Far East)

In 2022–2023 we carried out floristic research in the south of Sakhalin Island. As a result, new and rare species for this island were identified. For the first time, Campanula patula, Galeopsis tetrahit and Dracocephalum charkeviczii are reported for Sakhalin Island. Campanula patula is also a new species for the Russian Far East. Finding of Betula glandulosa (= B. exilis) in the Dolinsky district is the southernmost location on Sakhalin Island. New locations on the island have been identified for a number of rare alien species. For the first time in the Russian Far East, naturalized stands of Pinus banksiana were noted.