A creeping, evergreen perennial of wet open sites. In S. and E. Britain it is mostly restricted to bare soil or bryophyte mats in calcareous dune-slacks and short-sedge fens, and sometimes on acidic bogs. In the west it also occurs in a variety of soligenous and peaty mires, hillside flushes and rush-pastures, and relying on cattle, sheep or periodic flooding to keep sites open. 0-610 m (Buck of Cabrach, N. Aberdeen).
This species was lost from many 10-km squares in S. & E. England before 1930. Since then, further sites have been lost to grassland improvement, eutrophication and drainage. The distribution is stable elsewhere.
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.
Atlas text references
1962. La flore atlantique européenne. Documents pour les cartes des productions végétales serie Europe-Atlantique, vol. 1.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
1978. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 2. 2 vols.