Quote:
Originally Posted by JennyS  Slight re-think on the possible A. radiosa - could it be Solenopsora candicans instead with that black prothallus? |
I don't think the black prothallus is diagnostic. As I said, I have never seen
Aspicilia radiosa, but your photograph seems to match other pictures with those narrow marginal lobes and black (not pruinose) apothecia.
On the other hand, I have seen quite a lot of
Solenopsora candicans very recently and I would say that your photograph does NOT match it.
I think your original diagnosis is correct. Evidently it is a good record in Ireland, but since it is widespread on the English and Welsh limestone, it seems reasonable that you should have it too.
By the way, I saw an American book last week with several photographs of fruticose
Aspicilia species looking not unlike
Cladonia furcata. (Contemplates, yet again, giving up on lichens.)
Alan