pondweed

pond +‎ weed

pondweed (countable and uncountable, plural pondweeds)

1. Any of several plants that grow in ponds or similar aquatic conditions:
   1. (most commonly) Potamogeton, a diverse and worldwide genus
   2. Elodea, found in North America
   3. Azolla, of cosmopolitan distribution
      • 2018, Tim Flannery, Europe: A Natural History, page 76:

        If you have ever had a pond you will know Azolla, a.k.a. pondweed, duckweed fern or fairy moss.

   4. Aponogeton, in Africa, Asia and Australasia
   5. opposite-leaved pondweed, Groenlandia densa, only plant of its genus, found chiefly in the Mediterranean region.
2. Charales, an order of green algae

• American pondweed
• broad-leaved pondweed (Potamogeton natans)
• Cape pondweed (Aponogeton distachyos)
• Canadian pondweed (Elodea canadensis)
• choke pondweed (Elodea canadensis)
• curled pondweed (Potamogeton crispus)
• curly-leaf pondweed (Potamogeton crispus)
• curly pondweed (Potamogeton crispus)
• fennel pondweed (Stuckenia pectinata)
• horned pondweed (Zannichellia palustris)
• loddon pondweed (Potamogeton americanus, Potamogeton nodosus)
• long-stalked pondweed (Potamogeton praelongus)
• perfoliate pondweed (Potamogeton perfoliatus)
• ribbonleaf pondweed
• sago pondweed (Stuckenia pectinata)
• white-stem pondweed (Potamogeton praelongus)

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