Thick crustose lichen covered in isidia growing on a dry stane dyke.
Edit: title changed to match Synangium's ID - thanks.
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: 55.4737, -3.2026
OS grid ref: NT240206