Features
			
				It is a rather straggly perennial plant with slender underground runners.
			
			
				
					| Species | 
					Perrenial | 
				
				
					| Living space | 
					Dark forest, Lake, Pond, River edge, Swamp, Wet site | 
				
				
					| Size | 
					from 20 to 80 cm | 
				
			
			Description
			Leaves coarsely toothed, almost feathered at the base. The calyx teeth are 2 times longer than the calyx tube. Eurasian species, widespread from the lowlands to the Montana belt on occasionally flooded soils, on sedges, among embankment shrubs, in moist ditches.