? crustose lichen

? crustose lichen

Observation - ? crustose lichen - Global. Description: White lichen approx. 3cm diameter, tighly adherent to rock. Some black (?) reproductive bodies. Mainly sunny aspect, on horizontal surface.

White lichen approx. 3cm diameter, tighly adherent to rock. Some black (?) reproductive bodies. Mainly sunny aspect, on horizontal surface.