A deciduous, colony-forming herb which generally grows on deep, mildly acidic, often peaty soils that are kept permanently damp by flushing. It occurs on the lower slopes of mountain valleys, steep streamsides, wet ledges and open flushes, beside lakes and on the edges of drainage ditches. It also occurs on wet road verges and railway embankments. 0-850 m (Breadalbanes, Mid Perth).
There is little evidence of a decline in upland areas since the 1962 Atlas. The decline in the British lowlands was already apparent then, and has continued.
Circumpolar Boreo-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
Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols,
, Königstein, (1986)
Jalas & Suominen (1972)
Ferns and their allies,
, The Island of Mull: a survey of its flora and environment, London, p.12.1-12.7, (1978)
Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols,
, Jena, (1965)
The ferns of Britain and Ireland, edn 2,
, Cambridge, (1997)