A small, low-growing perennial herb found in damp, wet or boggy places on acidic soils, occurring on heaths, heathy pastures, moors, open woodland and Salix carr, and by streams and in flushes. In Ireland, it is most frequent beside streams and is absent from pastures. It prefers areas with moving, rather than standing, water. 0-485 m (Killakee, Co. Dublin).
The decline in this species from the edges of its range was already apparent by the 1962 Atlas, and has continued since then. Reasons for losses include habitat destruction, improvement of pastures, increased grazing and peat extraction.
Oceanic Southern-temperate element.
PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.