Search found 32 matches

by Glos lichens
Wed Mar 18, 2020 1:37 pm
Forum: Lichens
Topic: Physconia grisea and P enteroxantha
Replies: 1
Views: 364

Physconia grisea and P enteroxantha

I came across an Ash in the Cotswolds, Vc33 East Gloucestershire, with Physconia enteroxantha and Physconia grisea side by side. It makes an interesting study, particularly when working the keys. mm-scale_20200317_085825_3170036.jpg Using the Key in the Flora 2009, p704, both are sorediate, so that ...
by Glos lichens
Wed Mar 11, 2020 11:47 pm
Forum: Lichens
Topic: Weddellomyces on Aspicilia?
Replies: 5
Views: 244

Re: Weddellomyces on Aspicilia?

OK thanks, everyone. At least I know what a cephalothecioid plate is now in theory, but, as you said Paul, if I can see them at all, they are much less well defined in my specimen than the scanning electron microscope photo you attached. A good hard squash of the perithecia can yield a sort of latti...
by Glos lichens
Tue Mar 10, 2020 10:32 pm
Forum: Lichens
Topic: Weddellomyces on Aspicilia?
Replies: 5
Views: 244

Weddellomyces on Aspicilia?

Is this Weddellomyces pachyosporula? It is parasitising Aspicilia contorta on ballast from the track of the Gloucestershire Warwickshire Steam Railway in Vc33 East Gloucestershire. crop20200310_190836_3100043.jpg crop20200310_190311_3100031.jpg I have keyed it out in the Draft Lichenicolous Pyrenoca...
by Glos lichens
Mon Jan 13, 2020 3:36 pm
Forum: Lichens
Topic: Hairy Jelly
Replies: 7
Views: 579

Re: Hairy Jelly

Thanks All for your responses. It's not just me, then! I attach two more photos showing that the small hairs definitely do occur on the upper surface, in this example anyway. I don't think they are evenly spread across the whole lichen, though it is hard to tell once the isidia become dense. Perhaps...
by Glos lichens
Sun Jan 12, 2020 9:53 pm
Forum: Lichens
Topic: Hairy Jelly
Replies: 7
Views: 579

Hairy Jelly

I'm having problems with this tiny hairy jelly from a Cotswold oolitic limestone walltop. I've tried several keys, including the Draft key to Collemataceae on the BLS website. https://www.britishlichensociety.org.uk/sites/www.britishlichensociety.org.uk/files/BLF3%20accounts%20-%20Collemataceae%201....
by Glos lichens
Sat Jan 04, 2020 6:29 pm
Forum: Lichens
Topic: Fertile Diploicia canescens and its spores
Replies: 1
Views: 262

Fertile Diploicia canescens and its spores

I was lucky enough to find fertile Diploicia canescens on the bark of a senescent ash pollard last week, within a few hundred yards of the Severn in the south of Gloucestershire, so fairly near the coast if not exactly maritime. It is only the second time I have found Diploicia canescens fertile in ...
by Glos lichens
Wed Jan 01, 2020 5:40 pm
Forum: Lichens
Topic: Xanthoria parietina is C+ red
Replies: 3
Views: 344

Re: Xanthoria parietina is C+ red

My quibble wasn't whether Domestos contained sodium hydroxide or not, but that it gives a red reaction. A few years back I was running a beginners' session and provided them with KOH, Domestos, and Xanthoria parietina. "Does a spot of K give a reaction?" I ask. Yes! they reply delightedly. "Does C g...
by Glos lichens
Wed Dec 18, 2019 5:22 pm
Forum: Lichens
Topic: ?Endococcus on Thelidium decipiens
Replies: 6
Views: 673

Re: ?Endococcus on Thelidium decipiens

I contacted Paul Diederich who agreed that this looks like a Polycoccum from the photos but not to worry about the species. He added that the genus Polycoccum needs serious revision, plus descriptions of the many as yet undescribed species. If you collect material of a well-known Polycoccum, it shou...
by Glos lichens
Tue Dec 17, 2019 12:20 pm
Forum: Lichens
Topic: ?Endococcus on Thelidium decipiens
Replies: 6
Views: 673

Re: ?Endococcus on Thelidium decipiens

I have pursued the key, assuming that there are interascal filaments, and it now goes to Polycoccum marmoratum. However, reading Notes on the genus Polycoccum, (Atienza, Calatayud and Hawksworth, The Lichenologist Volume 35, Issue 2, March 2003 , p130) it says that halonate spores are unlike those o...
by Glos lichens
Mon Dec 16, 2019 8:37 pm
Forum: Lichens
Topic: ?Endococcus on Thelidium decipiens
Replies: 6
Views: 673

Re: ?Endococcus on Thelidium decipiens

Yes, as Fay suggests, maybe I need reminding what interascal filaments are! Well, there are messy trails between the asci, but I had decided these were not filaments - perhaps expecting filaments to be neat like paraphyses, with obvious septa, whereas I recall being warned that trails between the as...
by Glos lichens
Mon Dec 16, 2019 1:12 pm
Forum: Lichens
Topic: ?Endococcus on Thelidium decipiens
Replies: 6
Views: 673

?Endococcus on Thelidium decipiens

Checking fruit from what I thought was Thelidium decipiens from a limestone Cotswold wall top I was surprised to come across something with large brown 1-septate spores. Squashing further pyrenocarps from the same thallus, I came across proper Thelidium decipiens spores, so I guess whatever the brow...
by Glos lichens
Fri Dec 06, 2019 2:07 pm
Forum: Lichens
Topic: Lempholemma polyanthes?
Replies: 2
Views: 366

Lempholemma polyanthes?

Is this Lempholemma polyanthes, please? It is from the top of a Cotswold drystone wall, exposed and fairly dry, with Leptogium gelatinosum in the same community. It will be the second record for Vc33 East Gloucestershire, the other one being from 1972, but this is an unexceptional roadside wall and ...