Search found 58 matches

by Paul Cannon
Wed May 06, 2020 11:03 am
Forum: Fungi on miscellaneous substrates (not soil or wood)
Topic: Myzocytium netrii?
Replies: 2
Views: 298

Re: Myzocytium netrii?

Hi Chris
I think you'll be on your own with this one! It doesn't look very much like the pictures in the original publication (as Lagenidium netrii) - see https://www.jstor.org/stable/24333375 but it could be a different stage in the life cycle, I suppose.
Best wishes
Paul
by Paul Cannon
Tue May 05, 2020 10:31 am
Forum: Rusts, Smuts, and Mildews
Topic: Puccinia brachypodii?
Replies: 2
Views: 182

Re: Puccinia brachypodii?

Hello Clare Welcome to the group - and a great first post! Rust fungi are broadly considered to be strongly host-specific, due to their biotrophic mode of nutrition that involves parasitism of living plant tissues (rather than necrotrophs that kill the tissue and eat it afterwards). There's actually...
by Paul Cannon
Wed Apr 29, 2020 3:51 pm
Forum: Lichens
Topic: Graphis handelii in Britain
Replies: 5
Views: 255

Re: Graphis handelii in Britain

Thanks, but I think you meant G. elegans at the end of couplet 2a? Mark's been tweeting about inconsistencies in description of K+ norstictic reactions in LGBI2, I guess this was another example. Would be good to send material to Gothamie if you can, she'll be the expert guru for the Graphidaceae in...
by Paul Cannon
Wed Apr 29, 2020 1:43 pm
Forum: Lichens
Topic: Graphis handelii in Britain
Replies: 5
Views: 255

Re: Graphis handelii in Britain

Interesting... Just to check, G. elegans also has K+ yellow to red with crystals? In LGBI2 it says K+ red (crystals) but I assume this is incorrect or a shortened description of the reaction.

Paul
by Paul Cannon
Mon Apr 27, 2020 1:09 pm
Forum: Lichens
Topic: Biatoropsis on Usnea flammea - hafellneri?
Replies: 8
Views: 292

Re: Biatoropsis on Usnea flammea - hafellneri?

Yes, both articulata and ceratina are in the cornuta clade. It is worthy of remark, however, that cornuta in its traditional circumscription is very polyphyletic...
Will send you the paper.
Paul
by Paul Cannon
Mon Apr 27, 2020 9:20 am
Forum: Ascomycetes
Topic: Lachnum mollissimum
Replies: 4
Views: 534

Re: Lachnum mollissimum

I've dug around the history of this a bit - the synonymy of Trichopeziza mollissima and T. leucophaea seems to originate in Dennis (1960) - the first edition of his ascomycete book. It does seem curious that two taxa with such different phenotype were combined by such an illustrious discomycetologis...
by Paul Cannon
Mon Apr 27, 2020 9:09 am
Forum: Lichens
Topic: Biatoropsis on Usnea flammea - hafellneri?
Replies: 8
Views: 292

Re: Biatoropsis on Usnea flammea - hafellneri?

U. flammea wasn't included in the most recent major phylogeny of Usnea for some reason (Truong et al., Mol. Phylog. Evol. 68: 357, 2013). However, combining the info in this with the phylogeny in Saag et al. (Lichenologist 43: 427, 2011), it seems reasonable to assume that U. flammea belongs to the ...
by Paul Cannon
Thu Apr 23, 2020 10:52 am
Forum: Ascomycetes
Topic: Lachnum mollissimum
Replies: 4
Views: 534

Re: Lachnum mollissimum

Not a group that I know all that well, but I think the latest placement is in Trichopeziza - see http://fungi.myspecies.info/all-fungi/trichopeziza-mollissima. There does seem to be variation in the amount of yellow pigment around the hairs, but I think the yellow morphs predominate. There is anothe...
by Paul Cannon
Mon Apr 13, 2020 10:31 am
Forum: Fungi on miscellaneous substrates (not soil or wood)
Topic: Penicillium vulpinum
Replies: 5
Views: 676

Re: Penicillium vulpinum

Hello all I've been reluctant to leap in here, but here goes... The good news is that you clearly have a species of Penicillium. That's most of the good news. The bad news is that there are lots (maybe hundreds) of species, which have been studied almost exclusively in pure culture. That makes thing...
by Paul Cannon
Sun Apr 12, 2020 2:13 pm
Forum: Lichens
Topic: Arthonia cinnabarina group Sorted Out
Replies: 2
Views: 271

Re: Arthonia cinnabarina group Sorted Out

Presumably C. cuspidans corresponds to what used to be called Arthonia elegans auct. brit. in LGBI2. I only have one decent candidate for C. fallax in my collections, from Nant Gwynant underneath the eastern flanks of Snowdon; the spore size is just about right. The older paper (I'll send that to Ne...
by Paul Cannon
Sun Apr 12, 2020 1:16 pm
Forum: Lichens
Topic: Placynthium key
Replies: 6
Views: 472

Re: Placynthium key

Steve Price kindly sent me an image of P. garovaglii, also from the Malham area, which I post here (also on FGBI). He thought that your collection was garovaglii, and as it doesn't appear to have any noticeable pruina, perhaps you were right all along... And an aside - re-examining the collection I ...
by Paul Cannon
Sat Apr 11, 2020 2:06 pm
Forum: Lichens
Topic: Placynthium key
Replies: 6
Views: 472

Re: Placynthium key

This may increase the confusion, but... 1. I don't think that Nigel's specimen is P. nigrum, as he said that should be isidiate and the ascospores are substantially too long for that species. 2. The key to Placynthium needs modification for LGBI3, I'll try to address that. Part (but not all) of the ...