This cushion- or mat-forming perennial herb is confined to base-rich substrates. It is characteristic of a species-rich dwarf-herb ledge community on Scottish mountains. However, it also grows in sparse vegetation on exposed mountain plateaux, serpentine fell-fields, cliff-slopes and stabilised sand dunes. From sea level in W. and N. Scotland to 1305 m on Ben Macdui (S. Aberdeen).
There has been no appreciable change in the distribution of S. acaulis since the 1962 Atlas. It may still be present in many squares for which there are only pre-1987 records.
European Arctic-montane element; also in E. Asia and N. America.
Count of 10km squares in Great Britain: 236
Count of 10km squares in Ireland: 9
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: -0.47
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 (1986)
1962. Biological Flora of the British Isles. No. 83. Silene acaulis (L.) Jacq. Journal of Ecology. 50:475-487.
1996. Scottish Wild Plants: their history, ecology and conservation.
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.