Dorset, Lecanora sinuosa?

That’s an odd-looking one, Jenny. But I’d agree with John that it’s probably not L. sinuosa. It seems to lack the ‘incurved apothecium margin and thallus warts with a sinuous outline’ that give L. sinuosa its name, and which jump out clearly from John’s photo (van Herk & Aptroot, 1999, p 548).

So is it L. hybocarpa auct. br. then? If you can resolve a sharper image of the epithecial granules, it would be interesting to check their size against obvious specimens. According to the dichotomous key for Lecanora in the LGBI3 volume on the Lecanoraceae, both L. sinuosa and L. hybocarpa auct. br. have fine granules. But the L. hybocarpa auct. br. I see have coarse granules — notwithstanding some strange observations such as this one (and I recall you said you’ve also made a similar observation): https://twitter.com/specanatura/status/1740328559712043044” class=”bbcode_url”>https://twitter.com/specanatura/status/1740328559712043044.

LGBI3 also suggests that L. hybocarpa auct. br. might be a morph of L. sinuosa. Presumably there’s a continuum of characteristics between them.

Here’s the link to van Herk and Aptroot’s 1999 article containing their protologue for L. sinuosa: https://www.researchgate.net/profile/Kok-Van-Herk/publication/230604285_Lecanora_compallens_and_L_sinuosa_two_new_overlooked_corticolous_lichen_species_from_Western_Europe/links/0f3175314c957b506a000000/Lecanora-compallens-and-L-Sinuosa-Two-New-Overlooked-Corticolous-Lichen-Species-from-Western-Europe.pdf” class=”bbcode_url”>https://www.researchgate.net/profile/Kok-Van-Herk/publication/230604285_Lecanora_compallens_and_L_sinuosa_two_new_overlooked_corticolous_lichen_species_from_Western_Europe/links/0f3175314c957b506a000000/Lecanora-compallens-and-L-Sinuosa-Two-New-Overlooked-Corticolous-Lichen-Species-from-Western-Europe.pdf