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Species	Gratiola officinalis L.;
Taxonomy	Scrophulariaceae Juss.; Gratiola L.
Species distribution by Meusel et al. (1965)	European-WestAsian; Temperate-Submeridional
Life form by Raunkiaer	winter-green; helomorphe
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 = 7 Continentality = 5 Soil Moisture = 9 Soil Reaction = 0 Soil Nutrients = 0 Light value = 7
by Landolt (1977)	Temperature = 4 Continentality = 4 Soil Moisture = 5 Soil Reaction = 3 Soil Nutrients = 3 Humus value = 4 Aeration value = 5 Light value = 3
by Tsyganov (1983)	Temperature: 6-13 Continentality = 3-14 Ombroclimate = Crioclimate = 5-12 Soil Moisture = 7-21 Soil Reaction = 1-11 Soil Nutrients = 3-9 Mineral salt value = 5-11 Light value = 1-5