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
This fruticose lichen is found on coastal siliceous rocks in south-western Britain. In the Isles of Scilly it is not uncommon on steep inaccessible south to west facing granite cliffs on Gugh and St. Agnes where it grows amongst R. cuspidata . It has an Atlantic coastal distribution that also includes south-western Ireland, southern France, the Canary Islands and Madeira. The sites on the Isles of Scilly are SSSI whereas one of the West Penwith sites (Carn Galver) is under the protection of The National Trust. The other at Land' s End itself has no protection. There appears to be no immediate threat to this species at present.
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.