pondweed
(Science: botany) Any aquatic plant of the genus Potamogeton, of which many species are found in ponds or slow–moving rivers. Choke pondweed, an American water weed (Anarcharis, or Elodea, Canadensis) See anacharis. Horned pondweed, the Zannichellia palustris, a slender, branching aquatic plant, having pointed nutlets.
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