Caloplaca lucifuga
Description & Identification
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
Similar Species
Caloplaca ulcerosa and C. obscurella are similar but have more scattered and discrete soralia which are K-.
Records from Wales
| 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 |
SN998599 |
2009 |
R.G. Woods |
Yes |
| 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 |
NBN Taxon Key
NBNSYS0000039596
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