Hard acid rocks in dry underhangs and sheltered sides of old walls, usually near the coast.
SW England, W Scotland, W Ireland and W Wales. Outside the British Isles known only from Brittany.
|Location||Grid Reference||Last Rec'd||Recorder||SSSI|
|Cardigan: Coedmor NNR||SN14, SN24||1996||A. Orange & P. Wolseley||Yes|
|Caernarfon: Nantgwynant||SH65||1973||A. Pentecost||Yes|
|Meirionydd: Porthmadog||SH58274107||2002||A. Orange||No|
|Pembroke: Skomer Island - North Castle||SM7305||1750-1996||Unknown||Yes|
|Radnor: Coed Aberedw||SO0747||1960||Unknown||Yes|
Skomer Island - surveyed by Natural History Museum lichenologists in the mid-1990s, but this species not recorded.
Coed Aberedw - the record in the Welsh Threatened Lichen database puts this site in Ceredigion. But there is no site of this name in this vc and the grid-ref places the record in the Radnor site. This inland site is anomalous however.
Coedmor - occasional on rock outcrops in NNR compartments 2,6,9,10 and 11.
Porthmadog - Pen y Garn, Prenteg. On rocks below overhang in Quercus petraea woodland.
UKBAP Signposting Actions:
Monitor the habitat and species at two extant sites, at least every 6 years, to ensure that management maintains or expands woodland continuity and modify accordingly. Pay special attention to threats from excessive shade cast by climbers, and evergreen trees and shrubs, particularly invasive non-native species, and inappropriate grazing levels and forestry operations.
Promote agri-environment schemes capable of delivering appropriate site management.