Caloplaca citrina agg.
Description
A bright golden yellow or chrome yellow crust forming lichen. The true identity of British "citrina" is disputed at present and we have therefore treated this species as an aggregate.
Identification difficulty

Habitat
On rocks, walls and other artificial substrates.
When to see it
All year round.
UK Status
Apparently common throughout Britain, including urban areas.
VC55 Status
Fairly frequent in Leicestershire and Rutland.
Leicestershire & Rutland Map
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MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015