Added: 6th November 2011 Description:
Parmelia saxatilis or Parmelia tiliacea. Leafy, wavy at ends, grey-green. Sorry about the resolution in the photo's - I will try again with a better camera, I just cannot get good close ups with what I have.
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Some fungi are very poisonous so a mistaken ID could have serious consequences.
Confidence: It might be this. Notes: Parmeliaceae: I think this might be Parmelia tiliacea but I am not 100% sure, it could be Parmelia saxatilis, there is little between them I think - maybe someone could help out here. I find the lichen quite difficult - just when you think you have it, well there is always another it could be!
Confidence: It's likely to be this, but I can't be certain. Notes: I wouldn't have tried naming this - as you rightly recognise, the resolution of the photographs is insufficient for identification. However, the lobe shape is not right for Parmelia saxatilis and there appear to be no white flecks (pseudocyphellae) on the lobe surfaces. Parmelina tiliacea is just possible, as there is some evident browning towards the centre of the thallus, but the younger parts of the thallus appear to lack isidia. This is almost my home area, and P. perlatum is frequent to common, P. tiliacea is rare and I have not seen it in the area myself.
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