Notes: Average dimensions of the spores: Me = 24.7 × 12 µm ; Qe = 2.1 (N=27).
Given the circunstances of growing on bark, being sorediate and having such large 1-septate spores lead to the most probable identification as Buellia arborea. I think that this specimen matches very well the description given in CNALH for that species. I was not able to find any photo of this species in the internet, corresponding to the description cited above. There is a similar (fertile) species, B. disciformis, which differs by lacking soredia and having shorter and narrower spores.
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Sure, it’s an excellent work:
Smith, C.W., A. Aptroot, A. Fletcher, O.L. Gilbert, P.W. James and P.A. Wolseley (eds). 2009. The Lichens of Great Britain and Ireland. The British Lichen Society, London. 1046 pages.
to have chosen a plausible species for this lichen, so that now one can have an available photo of it in the internet.
In your comments to my observations you frequently refer to “British Flora”. Can you give me the complete reference of it? Thanks.
Yours. :) British Flora concurs with your identification.
Created: 2012-06-10 17:04:29 PDT (-0700)
Last modified: 2012-06-10 22:05:28 PDT (-0700)
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