Search found 24 matches
- Fri Aug 28, 2020 1:38 pm
- Forum: Lichens
- Topic: BLS Virtual Identification Meeting
- Replies: 17
- Views: 2602
Re: BLS Virtual Identification Meeting
Me too for the Cladonia idea
- Thu Aug 20, 2020 2:56 pm
- Forum: Lichens
- Topic: BLS Virtual Identification Meeting
- Replies: 17
- Views: 2602
Re: BLS Virtual Identification Meeting
Yes, I'd be interested Neil, depending on what/when etc.
Dave
Dave
- Wed Aug 19, 2020 4:19 pm
- Forum: Lichens
- Topic: Graphis crebra in GB (probably)
- Replies: 0
- Views: 1388
Graphis crebra in GB (probably)
I bumped into this whilst working in a woodland on Dartmoor and was instantly reminded of a pic of Neil's Graphis handelii from the New Forest. Whitish thallus, somewhere between scripta and elegans in initial appearance, elegans style 'pursed lips' of young lirellae, but unfurrowed margins on matur...
- Thu Aug 13, 2020 2:45 pm
- Forum: Lichens
- Topic: Crystals from confluentic acid??
- Replies: 10
- Views: 1702
Re: Crystals from confluentic acid??
Flicking through 'Microchemical methods' the other day I spotted this at the end of the section on 'KOH confluentic acid test' which references Alan's 1992 paper.... 'A solution of sodium hydroxide will also produce some droplets [as with actual KOH], but these are rapidly replaced by needle-like cr...
- Tue Jul 28, 2020 3:28 pm
- Forum: Lichens
- Topic: Crystals from confluentic acid??
- Replies: 10
- Views: 1702
Re: Crystals from confluentic acid??
That's funny, I'd just yesterday drafted a post on Megalospora tuberculosa, prompted by a very sorediate specimen of something I think is probably tuberculosa, which led me to thinking about the K/UV for atranorin, and just the UV itself. I'll finish it and post it anyway, might be of interest. Chee...
- Mon Jul 27, 2020 11:48 am
- Forum: Lichens
- Topic: Crystals from confluentic acid??
- Replies: 10
- Views: 1702
Re: Crystals from confluentic acid??
Thanks Neil. The K/UV worked ‑ a good mauve reaction.
Cheers
Dave
Cheers
Dave
- Fri Jul 24, 2020 12:36 pm
- Forum: Lichens
- Topic: Crystals from confluentic acid??
- Replies: 10
- Views: 1702
Re: Crystals from confluentic acid??
Thanks Neil, handy to know the K/UV, will give it a go later.
And handy to know about KOH vs NaOH, wikipedia suggested KOH is 'strongly exothermic' when mixed with water so, yes, NaOH may be safer!
And handy to know about KOH vs NaOH, wikipedia suggested KOH is 'strongly exothermic' when mixed with water so, yes, NaOH may be safer!
- Thu Jul 23, 2020 5:58 pm
- Forum: Lichens
- Topic: Crystals from confluentic acid??
- Replies: 10
- Views: 1702
Re: Crystals from confluentic acid??
Thanks Alan. Well, that's intriguing, I've just checked the ingredients of the caustic soda I use and it is indeed NaOH! So it seems my 'K' has actually been Na for a few years now! Life's full of surprises. Are KOH and NaOH completely interchangeable or it worth actually tracking down some KOH? And...
- Thu Jul 23, 2020 4:21 pm
- Forum: Lichens
- Topic: Crystals from confluentic acid??
- Replies: 10
- Views: 1702
Crystals from confluentic acid??
Hi, I've been dabbling in the world of saxicolous lichens for a change and think I have Lecidea confluens, maybe. One of the most obvious features under the microscope was the formation of some pretty spectacular crystals with the addition of K, see pics. There is no mention of this in LGBI that I c...
- Mon Jun 01, 2020 8:39 am
- Forum: Lichens
- Topic: Lecanora hybocarpa an overlooked lichen
- Replies: 11
- Views: 4867
Re: Lecanora hybocarpa an overlooked lichen
Thanks Neil
- Fri May 29, 2020 8:00 am
- Forum: Lichens
- Topic: Lecanora hybocarpa an overlooked lichen
- Replies: 11
- Views: 4867
Re: Lecanora hybocarpa an overlooked lichen
Thanks for the introduction to this method Neil, it's been a revelation! And a spectacular one at that. As suggested, most of my 'chlaro' I'm seeing here in coastal NW Wales has turned out to be argentata. These two seem pretty straightforward, but I'm struggling a little with possible hybocarpa spe...
- Thu May 28, 2020 9:05 am
- Forum: Lichens
- Topic: Interesting Things from Coed y Rhygen
- Replies: 6
- Views: 1994
Re: Interesting Things from Coed y Rhygen
Thanks Neil. That's exciting. There was an orange-brown pigment in the hymenium/epithecium alongside violet and blues which didn't quite match descriptions in the Flora for the others. What shall I do with the specimen - who best to send it to for confirmation one way or the other? I'd normally send...