Found on bark with inconspicuous thallus - immersed in the bark or as a thin grey film. Soralia are numerous and very crowded, often contiguous, pale yellow to dirty yellow-orange-brown, flat and ulcer-like bcoming convex and rounded; soredia farinose (floury). Apothecia are unknown. Chemistry: Thallus K-, soralia K+ purple Ray Woods says: This is a very obscure species first described in 1988. It appears as a khaki/gold smear that is K+purple. I have had immense difficulty refinding it in a number of sites.
Photo: V. Alstrup
Caloplaca ulcerosa and C. obscurella are similar but have more scattered and discrete soralia which are K-.
|Location||Grid Reference||Last Rec'd||Recorders(s)||SSSI|
|Brecknock: South of Trefeinion, Llangorse||SO13372946||2003||R.G. Woods||No|
|Brecknock: Pwll-y-Wrach, valley S of Talgarth||SO163325||1989||R.G. Woods||Yes|
Brecknock: North of Llysdinam
|Brecknock: Cwm yr Esgob, Carngafallt||SN9338164915||2011||R.G. Woods, I. Blatchley & A.O. Orange|
|Ceredigion: Nanteos Mansion Park||SN616780||1992||R.G. Woods||No|
|Ceredigion: Trawscoed||SN670733||1996||S.P. Chambers||No|
|Meirionydd: Corwen Rug||SJ058445||1996||A.O. Orange||No|
|Radnor: Maesllwch - Castle Park||SO1640||2003||S.P. Chambers||No|
|Radnor: N of Pencerreg||SO044540||1997||R.G. Woods||No|