UK Fungi

Did you consider Candelaria concolor?

Thank you Neil,that looks very possible - I'll email the images to Brian Coppins and see what he thinks.

Sorry for another post but I find these sterile sorediate were-Opegrapha's difficult!

Small, non-fertile patches near the base of an old Horse-chestnut - originally I thought it C- and just staining yellow into the drop of C on the slide but looking at the second photograph showing the result ...

I was investigating what I thought was a lichenicolous fungus on a Pertusaria thallus on Hazel but the spores (in K) were green becoming brown, 1-septate, 20-27 x 8-10 µm - and looked rather familiar.

Is this Mycomicrothelia confusa growing through the Pertusaria or have I missed something?

z ...

Thank you both for your replies, and very interesting that Anthony has also come across specimens with few or no large crystals in the margins.

These are the size/abundance of crystals I usually find in hybocarpa thalli (below), which is why I'd hoped they were something else!

z Lecanora ...

I'm struggling to identify some Lecanora found on a thin Birch branch in Dorset and the lack of large crystals in the margins plus granules descending into the hymenium seems odd.

So far I've examined four different thalli, all +/- cracked / areolate, bluish-grey and with a whitish +/- fimbriate ...

Thank you so much Paul - I'd hoped you might come across this thread.

You might be in luck with a specimen as I saved the twig it was on and looking at the twig again there are possibly a couple smaller perithecia near the one posted here........

I only saved the twig as next to the possible ...

Thanks for the reply Maxine - and yes, I got nowhere with Ellis & Ellis but after checking all the non-lichenised lichens (thanks to a link Anthony Speca posted on Bluesky) its not one with a BLS number.

I gave a year or two to trying to get somewhere with micro-fungi but in the end gave it up as ...

On a twig - a small perithecium (?) with a flattened, concave apex, K+ brownish-green but photobiont absent.

Asci possibly less than 8-spored, spores green > brown, (1-)3(-4) septate, occasionally with a vertical septa, 22-25 x 10-12 µm. Some, but not all, of the septa were noticeably pale.

In ...

Thanks Neil - the lack of granules in the epithecium, but their presence in the margins confused me!

However checking the Italic 8 descriptium for M. dispersa it includes:

Thalline exciple corticate, obscured by granules insoluble in K

though that's not mentioned in the LGBI3 account

Following an interesting talk on Trapelia's on a Zoom lichen meeting I looked again at old photos (Ireland 2009) that I'd identified as Trapelia glebulosa and wondered if the two below are Trapelia involuta instead?


Trapelia involuta not glebulosa 0908270054b.jpg Trapelia involuta not glebulosa ...

I think this is Unguiculariopsis lesdainii on a fence post Lecanora - but I'm struggling with the host identity!
Unguiculariopsis apothecia with swollen-based, whitish hairs, becoming +/- open as mature and not bleeding K+ red. Spores 5-6(-7) x 2 µm.

w Unguiculariopsis lesdainii 250315 011.jpg w ...