Potamogeton gramineous
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| Noun | 1. |  Potamogeton gramineous - of Europe (except the Mediterranean area) and the northern United Statespondweed - any of several submerged or floating freshwater perennial aquatic weeds belonging to the family Potamogetonaceae genus Potamogeton, Potamogeton - a large genus of aquatic herbs found in quiet waters in temperate regions; leaves usually float on the water |
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