The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Range & Status
Native. European Temperate species. Found throughout mainland Britain in large but localised areas. Also found in Northern Ireland and the Channel Islands.
Most of the extant sites are on Bodmin Moor (SX17) and the St. Austell granite area
(SW95, SX05), with localised populations near Porkellis (SW63), Rinsey (SW52), east of Downderry (SX35) and Rame Head (SX44). It probably still occurs at other coastal sites.
Habitat & Ecology
Grows mostly in a therophytic community on the top and sides of open and dry, moorland walls made of granite, on closely shaved (from mechanical flails) Cornish Hedges or in open rocky areas along the coast.
The main threat is from the scrubbing over of Cornish Hedges, particularly on the
Carnmenellis granite area, where is has declined markedly.
A few of the sites are within SSSI.
I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.
The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.