English edit

 
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Etymology edit

ribbon +‎ weed

Noun edit

ribbonweed (usually uncountable, plural ribbonweeds)

  1. Any of various marine and freshwater flowering plants:
    1. Species of Posidonia
    2. Zostera capricorni
    3. Ribbonleaf pondweed, Potamogeton epihydrus
    4. Stuckenia pectinata (Potamogeton pectinatus)
    5. Species of Vallisneria