Elodea canadensis (American or Canadian Waterweed or Pondweed) is a perennial aquatic plant, or submergent macrophyte, native to most of North America. It was first recorded from the British Isles in about 1836. Native to most of North America. Widely naturalised in the British Isles (female plants only). In Ireland found at several sites along the Eglinton Canal, County Galway and Co. Down. and from the Lagan Canal near Lisburn, Ireland.
Elodea canadensis
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