Search found 160 matches

by Neil Sanderson
Tue Aug 11, 2020 8:25 pm
Forum: Lichens
Topic: Protoparmelia hypotremella in Sussex?
Replies: 1
Views: 451

Re: Protoparmelia hypotremella in Sussex?

André Aptroot has confirmed that this collection is Protoparmelia hypotremella, so along with Mark's earlier record we have another, if expected lichen for Britain

Neil
by Neil Sanderson
Mon Jul 27, 2020 12:27 pm
Forum: Lichens
Topic: Crystals from confluentic acid??
Replies: 10
Views: 703

Re: Crystals from confluentic acid??

Yes it is a good easy test, confluentic is not common but the field test does solve a few difficult dichotomies. On trees Lecanographa lyncea / Lecanographa amylacea is especially valuable (the former with it and the latter without). I have another excellent use for Mark’s other new test K/UV (Dry) ...
by Neil Sanderson
Sat Jul 25, 2020 3:00 pm
Forum: Lichens
Topic: Crystals from confluentic acid??
Replies: 10
Views: 703

Re: Crystals from confluentic acid??

Dave

NaOH is quite exothermic too so needs care too on mixing with water. CaOH lime wash should work as well and I did read a report of Caloplaca species going K + red on the application of lime wash to a wall, but obviously NaOH much more practical.

Neil
by Neil Sanderson
Thu Jul 23, 2020 8:55 pm
Forum: Lichens
Topic: Crystals from confluentic acid??
Replies: 10
Views: 703

Re: Crystals from confluentic acid??

Dave, there is also Mark’s new confluentic test, shine a UV torch on a K spot test and you will get a bright mauve fluorescence if confluentic acid is present. KOH verses NaOH: there are a few differences, the confluentic acid as discussed, also Candelariella sp can go reddish, which is a bit confus...
by Neil Sanderson
Wed Jul 08, 2020 5:08 pm
Forum: Lichens
Topic: Protoparmelia hypotremella in Sussex?
Replies: 1
Views: 451

Protoparmelia hypotremella in Sussex?

Doing a reconnaissance survey of the landscape park at Knepp Castle in West Sussex I picked up one intriguing collection along with several other interesting species. I think this might be Protoparmelia hypotremella , a species recorded increasingly from the near continent and expected from Britain ...
by Neil Sanderson
Wed Jun 10, 2020 5:06 pm
Forum: Lichens
Topic: Stereocaulon from roofing felt
Replies: 2
Views: 505

Re: Stereocaulon from roofing felt

Jonas I am not very experienced with Stereocaulon species, so can not give a definite answer, but it looks like in the last picture the lower surface of pseudopodetia is thickly tomentose, which would rule out S. dactylophyllum . The LGBI 2 says this is usually without tomentum on lower surface, ver...
by Neil Sanderson
Mon Jun 01, 2020 9:41 am
Forum: Lichens
Topic: Lecanora hybocarpa an overlooked lichen
Replies: 11
Views: 3794

Re: Lecanora hybocarpa an overlooked lichen

Dave After I posted last noticed that the LGBI 2 had the solubility correct for Lecanora pulicaris i.e. dissolves in K but not N; Lecanora hybocarpa is the same as this. The LGBI 3 editorial committee (which I am on) really needs to start out this sort of error; not good at all! If any one has any p...
by Neil Sanderson
Sun May 31, 2020 9:52 pm
Forum: Lichens
Topic: Rummaging in my Herbarium
Replies: 0
Views: 1150

Rummaging in my Herbarium

As part of my lock down activities I have been rehousing my herbarium into more organised cabinets, a process which turned up specimens that just needed looking at, some with interesting results. A fertile Chrysothrix flavovirens specimen from lignum on standing dead Yew in Birch - Sallow -Oak - Hol...
by Neil Sanderson
Fri May 29, 2020 10:05 pm
Forum: Lichens
Topic: Lecanora hybocarpa an overlooked lichen
Replies: 11
Views: 3794

Re: Lecanora hybocarpa an overlooked lichen

Dave I am finding far more Lecanora argentata about than I realised was about until looked systematically. Mainly in woods down here. Yes those are fine for Lecanora hybocarpa , including the yellow colour of the crystals in polarising light, which might be diagnostic. If you find Lecanora pulicaris...
by Neil Sanderson
Thu May 28, 2020 1:04 pm
Forum: Lichens
Topic: Interesting Things from Coed y Rhygen
Replies: 6
Views: 1292

Re: Interesting Things from Coed y Rhygen

Paul Cannon might be interested for the LGBI 3 amount, then, if confirmed it should go to a national collection.

Neil
by Neil Sanderson
Wed May 27, 2020 6:53 pm
Forum: Lichens
Topic: Interesting Things from Coed y Rhygen
Replies: 6
Views: 1292

Re: Interesting Things from Coed y Rhygen

Dave I have now had a look on the computer and yes I think this very well maybe fertile Mycoblastus caesius ; well done! If correct just in time for LGBI 3. Mycoblastus sanguinarius can be sorediata ( Mycoblastus sanguinarius f. leprosus ) and this form has one of its few Welsh sites at the head of ...
by Neil Sanderson
Wed May 27, 2020 5:50 pm
Forum: Lichens
Topic: Interesting Things from Coed y Rhygen
Replies: 6
Views: 1292

Re: Interesting Things from Coed y Rhygen

Dave Looking on my phone, but I have an idea, looking at the thallus, how bright is the medulla UV fluorescence? because the thallus looks like some forms of Mycoblastus caesius to me. This means you might have fertile Mycoblastus caesius , which would be a first. It would also mean that this previo...