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|Noun||1.||Groenlandia - a monocotyledonous genus of the family Potamogetonaceae|
liliopsid genus, monocot genus - genus of flowering plants having a single cotyledon (embryonic leaf) in the seed
family Potamogetonaceae, pondweed family, Potamogetonaceae - plants that grow in ponds and slow streams; sometimes includes family Zosteraceae
frog's lettuce - very similar to Potamogeton; of western Africa, Asia, and Europe