Catalogue no.:	V-1113415
Taxon:	Potamogeton perfoliatus L.
Label:	Potamogeton perfoliatus
Family:	Potamogetonaceae
Collector:	Carl G. Alm & Harry Smith
Collector no.:	517
Date:	1946 08 21
Country:	Sweden
Landskap:	Uppland
Socken:	Skokloster
Locality:	Lillåker, i Mälaren vid båtbryggan