Salvinia natans (L.) All., 1785
Common names: Russ: Salviniya plavayuschaya; Ukr: Salviniya plavayucha
Taxonomic descriptions: Annual water plant 8-20 cm tall with both mega- and microspores. The stem is floating, filamentous and branched. The leaves are located in nodes in threes of which two of them are above the surface, and one - dissected submerged.
World level: NE
Black Sea Regional level: LR
Subregion level: LR (Ukraine)
Habitat type, Critical habitats, Limiting factors: Surfaces of slow waters.
Biology: Reproduction by spores and vegetatively. Spore ripening during VIII-IX.
Population trends: Numerous.
Threats: Drying and pollution of water bodies.
Conservation measures taken: The species has been entered in the Red Data Book of Ukraine (1996) and protected in the Danube delta (Ukraine and Romania).
Conservation measures proposed: To create new protected zones.
Compiled by: S.Dyatlov, T.Vasilieva