Crustose lichen on sycamore

Crustose lichen on sycamore

Observation - Crustose lichen on sycamore. Description: Grey/green crustose lichen on west-facing surface of Sycamore trunk. Tiny smooth discs and more fruit-tart like bodies

Grey/green crustose lichen on west-facing surface of Sycamore trunk. Tiny smooth discs and more fruit-tart like bodies