The charophytes (Characeae, Charophyceae) from the Yenisey Siberia (Russia)

The records of new localities charophytes from the Yenisey Siberia and confirmations for ones known before were summarized as a result study both available herbarium collections field studies during 2007–2021. twenty species, including one novel genus five species records, 59 (67 % its total number), 127 populations (83 number) found in this region. In particular, 12 (incl. 3 region) are Republic Khakassia, 17 (7) – Krasnoyarsk Territory, Tuva Republic. Chara is most species-rich frequent area study. taxonomic rank C. arcuatifolia sensu Hollerb. et Krassavina discussed. It seems to be morphotype globularis having clearly arcuate branchlets. Nitella tenuissima record Asian Russia. charophyte northernmost locality on continent was revealed. belongs virgata collected at Southern Taymyr. circumpolar Tolypella canadensis, far distant Komi Yakutia, region too. occurrence different ecoregions estimated. contemporary presence some after long intervals between observations their first confirmed. persistence same water bodies period revealed evidence stability populations, important protection. loss construction large Krasnoyarskoe Sayano-Shushenskoe reservoirs remarkable. red lists regions studied compiled suggested areas enabling protection