Parrot’s Feather is a perennial aquatic plant which has underwater stems up to 2 metres long. It bears very attractive, feathery, blue-green leaves and tiny white (female only) flowers in whorls of 4-6 in the leaf axils on stems emerging from the water. The leaves have dense, stalkless glands. The plant flowers from May to August and belongs to the Haloragaceae or Water-milfoil family. This is not native to Ireland.
I first saw Parrot’s-feather in Co Offaly in August 2016 and I photographed it at that time.
If you are satisfied you have correctly identified this plant, please submit your sighting to the National Biodiversity Data Centre