Catalogue no.:	V-1113450
Taxon:	Potamogeton perfoliatus L.
Label:	Potamogeton perfoliatus
Family:	Potamogetonaceae
Collector:	Sven O. Björkman
Date:	1943 07 21
Country:	Sweden
Landskap:	Hälsingland
Socken:	Bollnäs
Locality:	Herten nedanför Tjuvberget