Dark crustose lichen

Dark crustose lichen

Observation - Dark crustose lichen - UK and Ireland. Description: Shiny, dark grey, cracked, crustose lichen growing on coastal, cliff-top, siliceous rocks. Dark almost black prothallus. Lecanorine apothecia with black discs. Possibly Rinodina luridescens.

Shiny, dark grey, cracked, crustose lichen growing on coastal, cliff-top, siliceous rocks. Dark almost black prothallus. Lecanorine apothecia with black discs. Possibly Rinodina luridescens.