Catalogue no.:	V-1113451
Taxon:	Potamogeton perfoliatus L.
Label:	Potamogeton perfoliatus
Family:	Potamogetonaceae
Collector:	Einar Jansson
Date:	1905 08 08
Country:	Sweden
Landskap:	Hälsingland
Socken:	Järvsö
Locality:	Järfsö [Järvsö] Ljusnan