Lichen (c)

Lichen (c)

Observation - Lichen (c) - UK and Ireland. Description: Crust-like thallus, cream-grey colour. Volcano-like fruit structures (I think) with single dark (black) pore to each fruit structure. Segments of whole patch separated by sharply defined jigsaw-like lines rather than ragged, edge of torn paper lines. Foun

Crust-like thallus, cream-grey colour. Volcano-like fruit structures (I think) with single dark (black) pore to each fruit structure. Segments of whole patch separated by sharply defined jigsaw-like lines rather than ragged, edge of torn paper lines. Found on apple tree trunk. Maybe Pertusaria but no idea about species.