Grey crustose lichen

Grey crustose lichen

Observation - Grey crustose lichen - UK and Ireland. Description: Areolate grey crustose lichen growing on quartzite outcrop. Mottled grey surface but in some patch

Areolate grey crustose lichen growing on quartzite outcrop. Mottled grey surface but in some patches brown (second picture). Black apothecia 1-2 mm in size. Spores simple, almost spherical (see pictures 3, 4 and 5, all x400). Average size of 10 spores: 9 x 7 μm. Range: (8 – 10 ) x (5 - 8) μm. Possibly Fuscidea kochiana.