Parmelia sp.

 Parmelia sp.

Observation - Parmelia sp. - UK and Ireland. Description: Pale greeny-grey foliose lichen with whitish lines on upper surface. Sorry, I do not know English trees, needing flowers, leaves etc to even have a guess.

Pale greeny-grey foliose lichen with whitish lines on upper surface.

Sorry, I do not know English trees, needing flowers, leaves etc to even have a guess.