Photographs: © Dr. Michael Millane

Canadian Waterweed Elodea canadensis Tím uisce Family: Hydrocharitaceae Flowering July-August. Submerged aquatic perennial. Introduced. Inconspicuous pinkish flowers but only female flowers are produced and all reproduction is vegetative. The transluscent dark-green leaves are usually in whorls of 3. Stems to 3m. The first Irish record was in 1836 and now widespread in slow-moving or still water to a depth of 3m+. It is replaced in some locations by Nuttall's Waterweed. Listed as an invasive plant in Ireland. Thank you to Dr. Michael Millane, Inland Fisheries Ireland for correcting the photographs previously shown, which were of Nuttall's Waterweed, E. nuttalli

Canadian Waterweed, Elodea canadensis, Tím uisce