SylviaD
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Thanks Paul, My photos do look identical to your photo. But I will get sectioning and see if I can get some measurements for the epinecral layer or better still not find it much at all.
Thanks for your help.
Sylvia
Thanks for your help Neil, I’ll try and get some better photos for my files and store the sample. It’ll be interesting to see if anybody else finds something similar – the effect the LF gives is of tiny chameleon eyes on the lobes – a sphere with a tiny black pupil on top.
Best wishes,
Sylvia
Thanks for your reply Neil I’ve attempted some, hopefully better, slides. The spores seem quite resistant to staining, but I’ve attached a couple of photos from a new attempt and I can’t see any septa. The new staining also highlighted that the number of spores in each ascus seems to be 6 or 8.
Sylvia
Thanks for the information Paul – wishful thinking on my part there. Sylvia
That’s great, thanks Neil. Best wishes
Sylvia
Hi Peter, Is that on flint? Both Dirina massiliensis and Ingaderia vandenboomi form colonies that look like that on flint and other very smooth surfaces. They are often tricky to tell apart on Flint, although Dirina normally has a brown prothallus , whilst I. vandenboomi has a black prothallus. The soredia of I vandenboomii are pinker and finer/softer and I find the C reaction is instant and bright red. In contrast, Dirina soredia are much coarser, greyer and I find the C reaction is not nearly as bright red or as quick.
Sylvia
Thanks, Paul. The spores were very consistently that size and I had a large pool of material to look at, which did make me wonder if it was another Endococcus. Thanks for the link to the paper. I think sticking just with Endococcus might be best at the moment.
Best wishes
Sylvia
Thanks Maxine – I can’t believe I forgot to put in the spore size – it was 35-40 X 1.25-3.0 um There was little if any colour change with K, the only thing I noticed was the grey pigment in the exciple went from slightly grey/green to grey/lilac. I did a mount in K and thought the colour looked slightly different, so I then did a mount in water and flushed K through while on the microscope – and there was a change, but not sure I would say a great difference and probably not significant and might well just be my colour perception. I’ve attached a photo of the grey/lilac colour. Overall my general feeling was that not a lot or probably nothing happened with K.
Thanks for your help, Sylvia
Thank you so much Mark for your reply. Yes the healthy-looking apothecia were somewhat separate from the soredia as well also giving me some doubt. So I will focus on the soredia. Back to the microscope and see if I can find these haustoria. Thank you
Sylvia
Thanks both, Your photos were very helpful Jenny as there aren’t many photos available it seems. I’ll record as D pharcidium for the moment and keep the specimen – although this amounts to one mature apothecia and a tiny bit of thallus! I might have another tiny bit on another twig though.
Best wishes
Sylvia
Just an observation from Sussex. I’ve been monitoring the T.chrysophthalmus up on the South Downs above Brighton for about four years now. On one particular site on Wolstonbury Hill they seemed to completely disappear, but they have been pretty persistent at the other sites (Castle Hill, Waterhall – a particularly rich site, Newtimber Hill and Devils Dyke). But what I have noticed over the last two years is ‘babies’ – very tiny little thalli near the large well established ‘parent’ thalli, but also some on their own. The photos below show what I found at Castle Hill today. The largest thallus in the photo I have been visiting for four years – this year it’s surrounded by much smaller thalli in a range of sizes, which is new. Near it was also the thalli without apothecia, shown on the second photo, including very tiny thalli that can just about be seen. I’ve also found this at Devils Dyke and Waterhall over the past two years. If the large thallus dies though before the tiny thalli produce apothecia the chances of finding the tiny thalli are very low. This might not always be the case though – just something I’m seeing at my local sites. Sylvia
Hi, I did sections from four samples (four Oak trees). Photos are attached. The yellow was even more obvious in real life, in some of the medulla there was a very intense yellow, in other places a more mellow and buttery yellow, something impossible to capture with a photo. There was also variability within the same sample. These were all from Eridge Rocks near Tonbridge Wells, so almost in Kent, which is quite far east. It’s ancient woodland that is fairly humid.
I don’t think T Lueckingii has been recorded before in Sussex.
Thanks for your help,
Best wishes,
Sylvia
Many thanks Paul, I have brought a few samples back and will get sectioning and see what I find. I am really intrigued now as to how the two Thelotremas are distributed. I managed to see the media files OK, but I have had a few issues over previous days/weeks – the occasional error message and having to reload to get to a page, but never not being able to access it at all, which happened a while back.
Best wishes,
Sylvia
Thanks Pete, That’s what I thought but I was rather taken aback when the Thelotrema on every tree I tested went K+ orange. Well this is going to call for a bit of alteration to my records. Only one site done so far, it’ll be interesting in other areas where I’ve found Thelotrema.
Best wishes,
Sylvia
Thanks Neil, I don’t have a subscription to the lichenologist with my BLS membership, but that would be good to read. It’s probably T. coarctata – it’s not the first time it’s managed to confuse me!
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