New findings of quillworts (genus Isoetes L., Isoetaceae) in the Sverdlovsk region

The article presents the results of the floristic study of the distribution of Isoetes in the Sverdlovsk region conducted as a part of the regional Red Data Book maintenance. Field research was carried out in 2021-2023. 21 lakes were studied. Populations of 2 rare plants species listed in the Red Book of the Russian Federation and the Red Book of the Sverdlovsk Region ( Isoetes lacustris L. and I. echinospora Durieu) were found. I. echinospora grows in 3 lakes (Peschanoe, Glukhoye and Beloe lakes), I. lacustris is found in Lake Tavatuy. All habitats are located in specially protected areas. These type of protection provide the conservation of Isoetes populations.