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Keywords from Image Description:
Potamogeton obtusifolius winter buds . Potamogeton obtusifolius winter buds october nl Stomp fonteinkruid met winterknoppen turions Cite book Potamogetons in Relation to Pond Culture Moore Emmeline Washington DC Government Printing Office Plate XXXVI Creator Emmeline Moore PDUWASHFMIB Institution University of Washington FMIBsource