(Schrad.) Zahlbr.
A species of exposed, worked timber, tolerant of chemical treatments. The brown apothecia are typically abundant over a granulose crust. There are few records from the recording area, though the typical habitats of this species are infrequently recorded and it is in all probability reasonably widespread thoughout the recording area.
Listed by Alan Orange in Flora of Glamorgan (Wade et al, 1994).