A yellow crust forming lichen usually with abundant apothecia (0.2-0.4mm) which are orange to orange-brown. The apothecia are usually more obvious than than the thallus.
On calcareous substrates: limestone, mortar and concrete.
All year round
Occasionally found parasitic on Verrucaria species.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015