A perennial herb of calcareous mires, marshy grassland, water-meadows, flushes, Salix fen-carr and Alnus woods. 0-780 m (Cross Fell, Cumberland).
This species showed some losses before 1930 in the 1962 Atlas, and this decline has accelerated since then. This has followed the degradation or loss of its wetland habitats.
European Temperate element; also in C. Asia and N. America.
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.