Beige crustose on concrete slab

Beige crustose on concrete slab

Observation - Beige crustose on concrete slab - UK and Ireland. Description: These varieties of crustose were found in a suburban garden in Carlisle, Cumbria. Not familiar with any of their proper names.

These varieties of crustose were found in a suburban garden in Carlisle, Cumbria. Not familiar with any of their proper names.