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Keywords from Image Description:
Potamogeton crispus . en Potamogeton crispus burs in various stages of development June nl Gekroesd fonteinkruid juni Cite book Potamogetons in Relation to Pond Culture Moore Emmeline Washington DC Government Printing Office Plate XXXIV Creator Emmeline Moore PDUWASHFMIB Institution University of Washington FMIBsource accession