Notes: In this case is not properly the lichen, that I think to be Parmelina tiliacea, the reason of this observation but the black dots proliferating on some zones of the thallus. Of course these could be pycnidia, which are rare in P. tiliacea, according to the British Flora.
On the other hand, these black dots are full of filiform conidia with approximate dimensions of 7 × 1 µm. Again this can be the conidia of P. tiliacea, the form being like this and a bit smaller (4.5 × 1 µm, according to the British Flora). My doubt is that the internal structure of the dots seems to be a bit complicated for pycnidia and instead it could be a lichenicolous fungus at an imperfect state. What is the best option?
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Created: 2015-10-07 14:50:35 PDT (-0700)
Last modified: 2015-10-07 14:50:40 PDT (-0700)
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