Catalogue no.:	V-1111133
Taxon:	Potamogeton gramineus x perfoliatus
Label:	Potamogeton gramineus L.
Family:	Potamogetonaceae
Collector:	J. Lange
Date:	1846 07
Country:	Denmark
Province:	Sjælland
District:	Sorø
Locality:	Tisel Sø ved Sorø
Remarks:	Herb. E. Fries