Crustose lichen on concrete path

Crustose lichen on concrete path

Observation - Crustose lichen on concrete path - UK and Ireland. Description: Lots of patches of this yellow-orange crustose lichen on concrete path. Orange apothecia with bright yellow edges. Chemical tests: C-, apothecia K+ deep red. Possibly Caloplaca species.

Lots of patches of this yellow-orange crustose lichen on concrete path. Orange apothecia with bright yellow edges. Chemical tests: C-, apothecia K+ deep red. Possibly Caloplaca species.