Yellow placodioid lichen growing on siliceous rocks on beach. Lumpy yellow isidia on parts of thallus inside the outer lobes. Possibly Caloplaca verruculifera.
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
Lat/Lng: 51.7364, -5.2444
OS grid ref: SM760091