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Keywords from Image Description:
Potamogeton pectinatus . en Potamogeton pectinatus gigantic form of Dudley portion of leafy spray showing tubers November nl Schedefonteinkruid reuzevorm met knolletjes Cite book Potamogetons in Relation to Pond Culture Moore Emmeline Washington DC Government Printing Office Plate XXXV Creator Emmeline Moore PDUWASHFMIB Institution