Search found 8 matches

by Caz Walker
Mon Feb 24, 2020 8:46 pm
Forum: Lichens
Topic: Pseudocyphellaria norvegica chemistry
Replies: 2
Views: 249

Re: Pseudocyphellaria norvegica chemistry

Neil, thanks for your reply. I agree that the reactions I had matched P norvegica better than P intricata and that the lobe shape and arrangement of soralia also look right for the former. As you say, no K reaction is given for P norvegica so the K+ shades of red is not categorically wrong. I don't ...
by Caz Walker
Fri Feb 14, 2020 9:05 pm
Forum: Lichens
Topic: Pseudocyphellaria norvegica chemistry
Replies: 2
Views: 249

Pseudocyphellaria norvegica chemistry

Hi I have a specimen of what I'm pretty sure is Pseudocyphellaria norvegica collected in Argyll two weeks ago. Both in the field and back at home the chemistry of the medulla is consistent: C-, K+ pink or red, KC+ pale orange. According to Dobson this should be C+ red. I've tested mature very soredi...
by Caz Walker
Mon Feb 10, 2020 11:09 am
Forum: Lichens
Topic: A problematic Parmelia
Replies: 13
Views: 757

Re: A problematic Parmelia

Hi Have you considered Dermatocarpon? Mostly this genus is without rhizines but has immersed perithecia with visible ostioles, as in your pictures. Chemical reactions negative and it doesn't, in my experience, have adpressed lobes round the edge, as your photos show. The latter lobes do have the loo...
by Caz Walker
Tue Apr 02, 2019 12:48 pm
Forum: Lichens
Topic: Help with identification please
Replies: 9
Views: 1746

Re: Help with identification please

Pertusaria amara tastes very bitter, unlike P albescens (both fairly common).

http://www.lichens.lastdragon.org/Pertusaria_amara.html

Also P amara soralia KC+ purple (fleeting reaction).

Caz
by Caz Walker
Tue Apr 02, 2019 9:16 am
Forum: Lichens
Topic: Help with identification please
Replies: 9
Views: 1746

Re: Help with identification please

The zoned margin looks Pertusaia-like. Have you tasted it?!
Caz
by Caz Walker
Wed Mar 27, 2019 12:11 am
Forum: Lichens
Topic: Is this Vahliella leucophaea?
Replies: 4
Views: 1089

Re: Is this Vahliella leucophaea?

Thanks Paul. When we saw this it was probably dampish but not wet as it hadn't rained that day. We've reported our other records to the BLS but would you say there's enough certainty to also report this?
Caz
by Caz Walker
Tue Mar 26, 2019 10:52 am
Forum: Lichens
Topic: Is this Vahliella leucophaea?
Replies: 4
Views: 1089

Re: Is this Vahliella leucophaea?

Thanks for replying Chris. I appreciate how hard/impossible it is to id things from photos, but I was hoping someone had seen this before. The apothecia look fairly distinctive. BLS distribution maps show V leucophaea records being more numerous and occurring in the area where I saw this. V atlantic...
by Caz Walker
Tue Mar 19, 2019 11:28 am
Forum: Lichens
Topic: Is this Vahliella leucophaea?
Replies: 4
Views: 1089

Is this Vahliella leucophaea?

Hi This was seen in the Knapdale area of Argyll on a coastal rock in a semi-wooded area with top quality Lobaria nearby, ie fertile L amplissima etc. Hope the size is apparent from the first photo. Overall jizz of a very thin squamulose crust, not like Parmeliella, with a thin black stain-like hypot...