Search found 40 matches

by Paul Cannon
Tue Jan 21, 2020 11:18 am
Forum: Lichens
Topic: Thank you to Adam
Replies: 4
Views: 610

Thank you to Adam

I hope I won't get banned from the site for using it for an unauthorized purpose, but I've been reviewing use of the lichen forum since the BLS colonized it a year ago. If I've counted correctly, there have been 88 topics, 246 replies and an impressive 76040 views. It's been a great new resource for...
by Paul Cannon
Tue Jan 21, 2020 11:05 am
Forum: Ascomycetes
Topic: Catathecia
Replies: 5
Views: 891

Re: Catathecia

Rather late in the day, but hope this helps - a catathecium has a melanized lower wall and a thyriothecium just an upper wall, the asci forming on a bed of mycelium immediately over the underlying plant tissue. What this distinction means in evolutionary terms/real life I can't say...
by Paul Cannon
Tue Jan 21, 2020 11:03 am
Forum: Ascomycetes
Topic: On Oak Leaf
Replies: 2
Views: 477

Re: On Oak Leaf

Hello Chris I think this may be an Anthostomella. I started off thinking that it would be A. dryina (see http://fungi.myspecies.info/all-fungi/anthostomella-dryina) which I've found on oak leaves in Cornwall, but that has slightly smaller spores with a hyaline daughter cell, and the fruit-body size ...
by Paul Cannon
Mon Jan 13, 2020 10:37 am
Forum: Lichens
Topic: Hairy Jelly
Replies: 7
Views: 412

Re: Hairy Jelly

Hello everyone Feedback on all aspects of the LGBI3 project, especially keys, is very welcome, and I have tweaked the master copy to try to deal with this. In this case we are dealing with a terminology problem, that would probably be best dealt with in an extensively illustrated glossary (something...
by Paul Cannon
Tue Dec 31, 2019 12:27 pm
Forum: Rusts, Smuts, and Mildews
Topic: Coniothyrium on Yucca?
Replies: 4
Views: 1118

Re: Coniothyrium on Yucca?

Assuming those "small circular particles" are around 4-5 µm diam., they are consistent with conidia referred to as Coniothyrium concentricum. However, it is likely to be a species complex, and related to Paraphaeosphaeria species that have also been implicated in leaf spotting of Yucca. So use the n...
by Paul Cannon
Tue Aug 06, 2019 3:40 pm
Forum: Lichens
Topic: Small but perfectly formed
Replies: 2
Views: 797

Small but perfectly formed

Hello all Looking through a collection of bits and pieces from Dartmoor, I came across a fertile thallus of Cladonia portentosa . Not something I've seen before, apothecia aren't mentioned at all in LGBI2 and are noted as infrequent in the Nordic flora. Have I just not been looking beyond the gross ...
by Paul Cannon
Mon Jun 03, 2019 9:10 am
Forum: Lichens
Topic: Cladonia coccifera?
Replies: 4
Views: 988

Re: Cladonia coccifera?

Hello Bob Nice pictures! Cladonia coccifera is a species aggregate and your lichen certainly belongs here, but is probably not C. coccifera sensu stricto which is a Scottish mountain species. Most people would record this as C. diversa which is the common and widespread species of the aggegate, alth...
by Paul Cannon
Tue Mar 26, 2019 11:53 am
Forum: Lichens
Topic: Is this Vahliella leucophaea?
Replies: 4
Views: 987

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: 2375

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: 1603

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: 1603

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: 958

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...