Search found 33 matches

by Paul Cannon
Tue Mar 26, 2019 11:53 am
Forum: Lichens
Topic: Is this Vahliella leucophaea?
Replies: 4
Views: 294

Re: Is this Vahliella leucophaea?

I think that V. leucophaea is a good guess based on the images. V. leucophaea has a dark chocolate thallus that you see here, V. atlantica has a more greyish thallus and occurs on soil rather than rock (though V. leucophaea can also occur on soil over rock). I'm slightly hesitant because the lichen ...
by Paul Cannon
Tue Mar 26, 2019 11:02 am
Forum: Lichens
Topic: A new lichen for GBI?
Replies: 14
Views: 792

Re: A new lichen for GBI?

After a long delay (caused mainly by me forgetting to post off the specimen) I have had an identification from Othmar Breuss (the world expert in such species). His response is given below.... The " Placidiopsis cinereoides " specimen is Catapyrenium cinereum . I found only simple spores (but they m...
by Paul Cannon
Tue Mar 19, 2019 9:52 am
Forum: Ascomycetes
Topic: Perithecia in slits on Oak
Replies: 4
Views: 471

Re: Perithecia in slits on Oak

I still think this is a likely - ID - it may be colonising an existing fissure in the bark rather than causing it.

Best wishes
Paul
by Paul Cannon
Sun Mar 17, 2019 5:57 pm
Forum: Ascomycetes
Topic: Perithecia in slits on Oak
Replies: 4
Views: 471

Re: Perithecia in slits on Oak

I would look at Chaetosphaeria ovoidea (in Ellis & Ellis as Zignoëlla ovoidea), but more information on characters such as the ascus tip would be helpful. It's a common plurivorous species, so you wouldn't frighten the horses by giving it that name....

Best wishes
Paul
by Paul Cannon
Sat Mar 16, 2019 6:30 pm
Forum: Lichens
Topic: Another new lichenicolous species for the UK (and the Northern Hemisphere)
Replies: 3
Views: 218

Another new lichenicolous species for the UK (and the Northern Hemisphere)

Hello all At the recent BLS workshop at Cober Hill, Heather gave me a diseased specimen of Parmelia sulcata that she'd recently collected from Findhorn. After some digging around, I think that it is Endococcus parmeliarum , and I can't find any other records of the species except the type that was c...
by Paul Cannon
Tue Feb 26, 2019 12:33 pm
Forum: Ascomycetes
Topic: On Living Ivy
Replies: 6
Views: 607

Re: On Living Ivy

Sorry, have come to this rather late. Nothing much further to add regarding the first two species, but I think the third could be Vialaea insculpta . This has isthmoid ascospores (looking like two bananas in a chain) and can break up at the constricted part. However, the spores do look slightly narr...
by Paul Cannon
Sat Feb 23, 2019 5:31 pm
Forum: Lichens
Topic: Porpidia?
Replies: 4
Views: 244

Re: Porpidia?

If I had to give a name (any name!) on pain of death I would have plumped for P. cinereoatra as the apothecia look slightly pruinose from the picture, but this and contraponenda can only be told apart reliably by TLC. Porpidia is a really difficult genus, sometimes it's better to pretend you haven't...
by Paul Cannon
Sat Feb 23, 2019 5:21 pm
Forum: Lichens
Topic: Lichenicolous fungus on Ochrolechia parella
Replies: 2
Views: 203

Re: Lichenicolous fungus on Ochrolechia parella

Hello Chris
This is Lichenostigma alpinum (the Phaeosporobolus anamorph). It's been recorded once from the Outer Hebrides (by Brian Coppins from the Shiants) and around 20 times from Scotland - it's probably overlooked rather than rare, but a useful new record nonetheless.

Best wishes
Paul
by Paul Cannon
Sat Feb 23, 2019 5:00 pm
Forum: Lichens
Topic: Parmotrema on hazel
Replies: 3
Views: 222

Re: Parmotrema on hazel

Thank you, Neil. No KC+ reaction. I found another piece of Parmotrema this afternoon, no KC+ again so presumably perlatum. That also had the strong blue reaction with the Convoy UV light, but neither of the samples showed any blue reaction with my other UV light (the blue one recommended by Neil bef...
by Paul Cannon
Fri Feb 22, 2019 6:30 pm
Forum: Lichens
Topic: Parmotrema on hazel
Replies: 3
Views: 222

Parmotrema on hazel

Hello all I assumed the lichen with the attached images was just Parmotrema perlatum , but to my surprise the medulla is definitely UV+ ice blue (perhaps even bright blue, the image doesn't do it justice - and note also the brilliant yellow fluorescence of the K+yellow cortex). So that seems to make...
by Paul Cannon
Wed Feb 06, 2019 4:55 pm
Forum: Lichens
Topic: Porpidia?
Replies: 2
Views: 200

Re: Porpidia?

Hello Paul
There are only a few Porpidia species on calcareous substrata and none would be expected in your area. I would compare your specimen with Clauzadea monticola, which has a dark brown hypothecium and is common on limestone.
by Paul Cannon
Fri Jan 25, 2019 9:37 am
Forum: Lichens
Topic: Abrothallus on Melanohalea exasperata
Replies: 5
Views: 292

Re: Abrothallus on Melanohalea exasperata

<r>Hello Jenny<br/> No name for this yet, as far as I know. There are around 20 records of an unidentified <I><s>[i]</s>Abrothallus <e>[/i]</e></I>on <I><s>[i]</s>M. exasperata <e>[/i]</e></I>in the BLS database, mostly from western and Highland Scotland but a couple from SW England. However we need...