Search found 159 matches

by Neil Sanderson
Fri Apr 24, 2020 4:24 pm
Forum: Lichens
Topic: Biatoropsis on Usnea flammea - hafellneri?
Replies: 8
Views: 619

Re: Biatoropsis on Usnea flammea - hafellneri?

Dave I'm right in thinking that U. flammea is part of the U. fragilescens group... Yes, fairly sure mainly as I have no idea what I'd be looking for! It is a basio, when I have had a look inside Biatoropsis galls the contents were best described as featureless mush. I have with difficulty found the ...
by Neil Sanderson
Sun Apr 12, 2020 3:31 pm
Forum: Lichens
Topic: Hypotrachyna afrorevoluta or revoluta ?
Replies: 3
Views: 534

Re: Hypotrachyna afrorevoluta or revoluta ?

I agree with Mark that this is Hypotrachyna afrorevoluta and would go further and say the lichen is as near as dammit definitely this.

Did you find this http://wessexlichengroup.org/Species/Hypotrachyna/, a page I put up some time ago on these two species.

Neil
by Neil Sanderson
Sun Apr 12, 2020 3:23 pm
Forum: Lichens
Topic: Arthonia cinnabarina group Sorted Out
Replies: 2
Views: 423

Re: Arthonia cinnabarina group Sorted Out

Paul Yes that looks like a very good candidate for Coniocarpon fallax Oh yes forgot to say, please ferret around in your Arthonia cinnabarina and Arthonia elegans (auct. brit. LGBI2), collections while we are grounded and see if any one has any more Coniocarpon fallax . One result I had in my herbar...
by Neil Sanderson
Sun Apr 12, 2020 12:48 pm
Forum: Lichens
Topic: Arthonia cinnabarina group Sorted Out
Replies: 2
Views: 423

Arthonia cinnabarina group Sorted Out

Brian has just alerted me to this new paper, Frisch, Moen, Grube & Bendiksby (2020) Integrative taxonomy confirms three species of Coniocarpon (Arthoniaceae) in Norway. MycoKeys 62 : 27-51 https://mycokeys.pensoft.net/article/48480/list/1/ . This sorts out the Arthonia cinnabarina group in Western E...
by Neil Sanderson
Thu Apr 09, 2020 3:57 pm
Forum: Lichens
Topic: Placynthium key
Replies: 6
Views: 753

Re: Placynthium key

Nigel Well outside of my comfort zone, and looks a difficult key, one of those where the writer knows exactly what they mean but really should put it in pictures not words! Being very innocent in this group can I ask why this is not Placynthium nigrum ? Italic has a description and picture at http:/...
by Neil Sanderson
Sat Apr 04, 2020 10:25 pm
Forum: Lichens
Topic: Rinodina capensis New to Britain
Replies: 1
Views: 443

Rinodina capensis New to Britain

I hope you are all OK, healthy and bearing up. I am luckier than most, my business is now totally stalled, but I have some resources so am OK and I can walk my dogs 10mins down the road and reach the common land of the New Forest. Here the dogs and I can wonder around one of the most lichen rich Bee...
by Neil Sanderson
Sat Apr 04, 2020 9:59 pm
Forum: Lichens
Topic: Chaenotheca trichialis?
Replies: 7
Views: 868

Re: Chaenotheca trichialis?

I can not be any more definite with those pictures, happy to have a look at the specimen. As for algae, I suspect the LGBI2 was using a need to know basis; Stichococcus looks like nothing else associated with Chaenotheca species, so I have no idea if there are other algae that look similar, I hope s...
by Neil Sanderson
Thu Apr 02, 2020 9:26 pm
Forum: Lichens
Topic: Chaenotheca trichialis?
Replies: 7
Views: 868

Re: Chaenotheca trichialis?

Yes your algae is Stichococcus. I would need to see a better picture of the thallus to be sure of the identity of the Chaenotheca species. Typically the thallus Chaenotheca trichialis is quite blue-grey and almost squamulose, but it can be greener and more granular, and I can not quite make out what...
by Neil Sanderson
Thu Apr 02, 2020 9:13 pm
Forum: Lichens
Topic: Chaenotheca: a Pd/UV Reaction & a Question
Replies: 5
Views: 2041

Re: Chaenotheca: a Pd/UV Reaction & a Question

Dave there was a slight yellowing of the thallus as you describe here so that's all good. Interestingly though, I'm not getting a Pd/UV reaction. Should be OK, the Pd typical produces a black stained mess with the yellow reaction only visible on the edge of the spot in this species. The UV + yellow ...
by Neil Sanderson
Thu Apr 02, 2020 9:04 pm
Forum: Lichens
Topic: Chaenotheca: a Pd/UV Reaction & a Question
Replies: 5
Views: 2041

Re: Chaenotheca: a Pd/UV Reaction & a Question

Alan Yes I was deeply impressed with what has survived here. The beginning of the Loftus ravine was dull but much better further in. The 2020 BLS winter workshop met further south and had a look at another ravine, May Beck. we were at the upper end of this so a bit different but found, astonishingly...
by Neil Sanderson
Thu Apr 02, 2020 8:52 pm
Forum: Lichens
Topic: Sterile crust on Aspen
Replies: 3
Views: 441

Re: Sterile crust on Aspen

Christine

Yes happy with Mycoblastus caesius, I just expected the UV florescence to be more obvious, but the lichen is poorly developed, so partly patchy florescence.

Neil
by Neil Sanderson
Wed Apr 01, 2020 12:40 pm
Forum: Lichens
Topic: Sterile crust on Aspen
Replies: 3
Views: 441

Re: Sterile crust on Aspen

Christine That is definitely not Pertusaria albescens . Also the K "reaction" is probably not a reaction, and is simply the algae becoming more visible as K clarifies the tissue (as it does with spores). The only thing I can think of is Lecidea nylanderi , this is general similar to Mycoblastus caes...