Acarospora impressula

Acarospora impressula

Observation - Acarospora impressula - UK and Ireland. Description: Small thalli (compared to A. fuscata) scattered on siliceous coastal rock; apothecia concave (presumably why it is 'impressula'); C-, K-.

Small thalli (compared to A. fuscata) scattered on siliceous coastal rock; apothecia concave (presumably why it is 'impressula'); C-, K-.