Catalogue no.:	V-1110301
Taxon:	Potamogeton gramineus x perfoliatus
Label:	Potamogeton gramineus var. heterophyllus
Family:	Potamogetonaceae
Collector:	Th.M. Fries
Date:	1858 08
Country:	Sweden
Landskap:	Uppland
Socken:	Fasterna
Locality:	sjön Matsjön i Fasterna