Small thalli (compared to A. fuscata) scattered on siliceous coastal rock; apothecia concave (presumably why it is 'impressula'); C-, K-.
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: 52.9045665, -4.6487459
OS grid ref: SH219374