Information on Thread-leaved Water-crowfoot

Common Name: Thread-leaved Water-crowfoot
Scientific Name: Ranunculus trichophyllus
Irish Name: Néal uisce ribeach
Family Group: Ranunculaceae
Distribution: View Map (Courtesy of the BSBI)
Flowering Period


Click for list of all flowering by month

This is an annual or perennial plant which grows on wet mud, in brackish water, ponds and damp ditches. It has no floating leaves, but has submerged, finely divided and – as its name would suggest – thread-like leaves which fan out and branch repeatedly. The flowers (6–10 mm) are white with yellow centres, have five well-spaced petals and crescent-shaped nectaries. They flower in May and June, are not too commonly found around the country. They are native plants and belong to the Ranunculaceae family.    

I first found this plant growing on Dublin's North Bull Island in 2010 when I also photographed it. 

If you are satisfied you have correctly identified this plant, please submit your sighting to the National Biodiversity Data Centre

Water-crowfoot, Thread-leaved
Water-crowfoot, Thread-leaved