White crustose lichen

White crustose lichen

Observation - White crustose lichen - UK and Ireland. Description: Powdery surface. very large about 30cm, some patches 60+cm (easily visible from 50 yards or more). Growing on a basaltic rock outcrop almost devoid of most other type of lichen, but absent elsewhere where there are plenty of lichen varieties!!

Powdery surface. very large about 30cm, some patches 60+cm (easily visible from 50 yards or more).
Growing on a basaltic rock outcrop almost devoid of most other type of lichen, but absent elsewhere where there are plenty of lichen varieties!!