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Species	Bidens cernua L.;
Taxonomy	Asteraceae Dumort.; Bidens L.
Species distribution by Meusel et al. (1965)	Circumpolar; Boreal-Meridional
Life form by Raunkiaer	summer-green; helomorphe, mesomorphe
Relation to Central Russian Flora	original
Ecological-coenotic group and subgroup	Water-Swamp
Life strategy by Grime (1979)
Species indicator values
by Ellenberg et al. (1991)	Temperature = 0 Continentality = 5 Soil Moisture = 9 Soil Reaction = 0 Soil Nutrients = 9 Light value = 8
by Landolt (1977)	Temperature = 4 Continentality = 3 Soil Moisture = 5 Soil Reaction = 3 Soil Nutrients = 5 Humus value = 4 Aeration value = 4 Light value = 4
by Tsyganov (1983)	Temperature: 5-13 Continentality = 3-15 Ombroclimate = Crioclimate = 4-12 Soil Moisture = 15-19 Soil Reaction = 1-13 Soil Nutrients = 7-11 Mineral salt value = 3-13 Light value = 1-3