This evergreen species is a calcicole, growing in well-drained, cool and moist positions at the base of cliffs, on rocky ledges, and particularly in stabilised boulder-scree. It also grows in deep grikes of limestone pavements. P. lonchitis is a poor competitor, but is long-lived once established. From 180 m at Inchnadamph, W. Sutherland, but generally above 600 m and reaching 1150 m in the Breadalbanes (Mid Perth).
Although some sites were lost to collecting before 1930, there has been little evidence of a change in the distribution since the 1962 Atlas.
Circumpolar Boreal-montane element, with a disjunct distribution.
Count of 10km squares in Great Britain: 181
Count of 10km squares in Ireland: 20
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: -0.76
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
1988. The Irish Red Data Book. 1. Vascular Plants.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1972)
1978. Ferns and their allies. The Island of Mull: a survey of its flora and environment. :12.1-12.7.
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.
1997. The ferns of Britain and Ireland, edn 2.