Search found 24 matches

by Paul Cannon
Fri Feb 22, 2019 6:30 pm
Forum: Lichens
Topic: Parmotrema on hazel
Replies: 1
Views: 21

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: 72

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: 110

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...
by Paul Cannon
Wed Jan 23, 2019 11:20 am
Forum: Lichens
Topic: Xanthoria
Replies: 14
Views: 471

Re: Xanthoria

I think Mark is right about Caloplaca (now Flavoplaca) marina. There is a very similar image on the FGBI site (which is misbehaving yet again) from the Isle of Muck. Looking back at the various images I have of this species, most of them have a black encrustation. Attached are three from Caloplaca m...
by Paul Cannon
Wed Jan 23, 2019 10:42 am
Forum: Lichens
Topic: Xanthoria
Replies: 14
Views: 471

Re: Xanthoria

I think Mark is right about Caloplaca (now Flavoplaca) marina. There is a very similar image on the FGBI site (which is misbehaving yet again) from the Isle of Muck. And the images are beautiful, though spores mounted in KOH are more useful for ID in this group as that's how the taxonomists have his...
by Paul Cannon
Mon Jan 21, 2019 12:44 pm
Forum: Lichens
Topic: A new lichen for GBI?
Replies: 13
Views: 369

Re: A new lichen for GBI?

Hello Maxine
I think this was the one we found in Galloway in April 2018!
by Paul Cannon
Sun Jan 20, 2019 2:07 pm
Forum: Lichens
Topic: White Crustose Lichen
Replies: 8
Views: 193

Re: White Crustose Lichen

Jenny's Herteliana suggestion is worth following up. The thallus is described as pale duck-egg blue but the colour isn't always well developed. Or it could be one of the Opegrapha species that are lichen parasites, which would account for the irregular apothecia. You are sure that the white is a lic...
by Paul Cannon
Sun Jan 20, 2019 2:01 pm
Forum: Lichens
Topic: Coastal Crustose
Replies: 2
Views: 80

Re: Coastal Crustose

Hello Chris, good to see you're getting your eye in! This is an Acarospora , I think, which has ascospores that fragment into hundreds of part-spores. The colour suggests A. smaragdula but it could also be the very common A. fuscata . The former is C- and usually K+ red, the latter is C+ red and K-....
by Paul Cannon
Sun Jan 20, 2019 1:19 pm
Forum: Lichens
Topic: A new lichen for GBI?
Replies: 13
Views: 369

Re: A new lichen for GBI?

Thank you to Mark for his opinion on the species (welcome to the forum!), and to everyone else who has commented. Othmar Breuss has offered to take a look at the specimen, and once I've got around to posting it and getting a response, I'll make another update. The Nimis & Martello book is available ...
by Paul Cannon
Thu Jan 10, 2019 12:07 pm
Forum: Lichens
Topic: A new lichen for GBI?
Replies: 13
Views: 369

Re: A new lichen for GBI?

Thank you for the info, Neil - I hadn't seen that paper. The picture looks not entirely different from my specimen, so cineroides still seems to be an option. Othmar Breuss has offered to look at it, so we may know more in time.

Best wishes
Paul
by Paul Cannon
Wed Jan 09, 2019 12:56 pm
Forum: Lichens
Topic: Phaeographis smithii?
Replies: 6
Views: 237

Phaeographis smithii?

Hello all I picked this up from an oak twig near Guildford yesterday afternoon. I had assumed that it was a parasitic fungus (probably Colpoma ) bursting through a young lichen thallus, but the fruit bodies do belong. It seems to be Phaeographis smithii which would be new to the VC (but then lots of...
by Paul Cannon
Mon Jan 07, 2019 6:10 pm
Forum: Lichens
Topic: A new lichen for GBI?
Replies: 13
Views: 369

A new lichen for GBI?

I am an eternal optimist when it comes to lichen identification, so this may turn out to be less exciting... I've been going through some samples from a soil pocket in siliceous maritime rocks near Stranraer (VC74) and have come up with what seems to be Placidiopsis cinereoides . This was described ...