Catalogue no.:	V-1112371
Taxon:	Potamogeton obtusifolius Mert. & W.D.J.Koch
Label:	Potamogeton obtusifolius
Family:	Potamogetonaceae
Collector:	H.W. Arnell
Date:	1920 07 20
Country:	Sweden
Landskap:	Uppland
Socken:	Rimbo
Locality:	sjön Björken