Beiträge von Steve_mt

Zitat von ogni volta

I just had wished you let us participate a little of your knowledge and tell Steve something like "look thats the reason why these limits are correct even if they seem large" or at least "read this chapter on statistics in Wikipedia it might help you understand the term".

Kind regards, Ingo

It is a bit true Ingo. Sometimes, I ask for help and instead of two hands or a hand I get a finger, and that could sometimes be also good enough to help myself and try to understand. Usually, I ask for the second finger (as I did here) and hope I get some reply to my simplified hypothesis. Thanks for your support

Is this Physarum bitectum simply for its habit and habitat or I should investigate for other species.

As you know these white Physarum requires examination of the Capillitium, Columella and Spores. Ph. album and pusillum look like that but other look-alikes also do.

Good morning,

I have found this cute Coprinellus on horse dung on lawn under maquis trees which when young they are 2 mm orange-brown bodies and then develops into a 5 - 10 mm gray pileus with puntate veil remnants that are orange-brown. When young the veil is in isolated patches These are composed of globular cells. I should be in the genus Coprinellus (? Domestici)

The spores are 13 x 8 um (mean) dark brown with a tiny pore. I thought that I saw an oblique pole at the germ pore or it is just a bit eccentric. Another interesting feature is the presence of caulocystidia (also seen in macro pics) which have a long neck and a nice rounded head. I have seen these in the pileus too. The pileus was deliquescent and was not able to see Cheilo/Pleuros.

I am gonna suggest Coprinellus curtus (KALCHBR.) VILGALYS, HOPPLE & JACQ. JOHNSON although the spores are just not too large. It really matches to this:

Coprinellus curtus (Kalchbr.) Vilgalys, Hopple & Jacq. Johnson 2001 - 115305 - Biodiversidad Virtual / Hongos y Líquenes

Thanks Bjorne. The literature in the manual is quite heavy for me to understand and the french - English translation is not so good for this technical doc.

the format a [b ; c] z states that the min-max range is b - c for covering 80% sample(? did I understand well?) and a - z (mini / maxi) is more or less an estimated 100% range. Hence with a small sample size, the estimation on the mini/maxi may appear out of proportion.

It would be great if Pixmetere can allow formatting of the formulas. I really like a simpler (min-) mean (-max)

LG

Steve

Dear Ingo,

Thanks for going into this and writing back. I greatly appreciate you did this and have some answers. So as I see, these 'erroneous limits' (Min-Max) are a result of measuring a few spores but should be more reliable when measuring say > 20 as I usually do. Hmm, it is strange that it gives this weird reading to be honest! They should fix it without doing 'assumptions' and error corrections. Knowing this, it is a bit reassuring that the formulas by Pixmetre are fine to report in papers/literature.

With regards your other point, I was also noticing that spores located at about 10% border of the image are a bit stretched out giving false larger sizes. I hence measure spores around the centre and avoid the margins. I take several images when few spores are present.

Thanks Ogni

Zitat von thorben96

Hi Steve,

interesting question, because i don't know anything about C. dennisii and i'm not familiar with this genus.

If you are interested about more details you can contact Zotto on Ascofrance or E-Mail.

I haven't count the septa from the paraphyses.

best regards,

Thorben

Alles anzeigen

I got this ascomycete identified on Ascofrance too and everything seems to match except the number of speta of the paraphyses. The description says 2, I had 4. On the other hand this is never mentioned to be important character.

Some info dear friend

Hi, I am studying a similar (probably same) species ... Can you say how many septa the paraphyses have? Note there is also this ambiguous C. dennisii (GBIF: one occurrence in Japan, but recorded/described from central Europe).

[edit]

Rare species of Lepiota and other genera,

BŁAŻEJ GIERCZYK, ANNA KUJAWA, ANDRZEJ SZCZEPKOWSKI

and PIOTR CHACHUŁA[/edit]

Hi, I have to retreat from my first impression of being a Pseudobaeospora because this genus do not produce a ring and it has tubular straight (needle-like) hyaline rhizoids that are not present in the examined material. The other collection is a Pseudobaeospora so that was a different species from the one in this post. So, now I have to fall back to a small Leucoagaricus (or Lepiota?!).

Now this text from Wikipedia is crazy: " Leucoagaricus sericifer is an agaric fungus in the genus Leucoagaricus. It was originally described as Pseudobaeospora sericifera by French mycologist Marcel Locquin.^[1] It is widespread in Europe".^[2]

Well, I have to repeat the micro maybe from a younger specimen maybe something went wrong.

From my archives, here is an organism which I could not make a clue. I have only external images, no micro. I was thinking about some sort of structured mould (an anamorph of something maybe ?!?). Maybe someone has met something similar and can suggest some additional info... without expecting miracles! These were growing on fallen branches of Eucalyptus trees

Thanks in advance

Yes, I confirm that Cyanoboletus pulverulentus becomes deep blue in few seconds (=instantly). Problem with external colours form me is that they vary with maturation and also interspecific variety. Old specimens of Cyanoboletus are really dull and unattractive, young ones are quite more eye-pleasing. Thanks for your explanation Seb.

L.G.

Stephen

For my learning ... could the 6th mushroom which stains deep blue be Cyanoboletus pulverulentus? (also an oak lover!)

Thanks

Hello again. I found a few examples of this beautiful Lactarius with a burnt orange pileus and a reddish stipe which gradually deepens to blackish-red at the base. Spores subglobose with reticular ornamentation around 8 um diameter. Sap not abundant turbid (not milk-white) slightly bitter but not strongly so. I was thinking that this is the Lactarius atlanticus but after reading this site:

LACTARIUS ATLANTICUS

two look likes are mentioned: L. serifluus and L. subumbonatus, but I think both are not the same that I have photographed. The atlanticus epithet (hence indicating its distribution is far west) and the dark red stipe put some doubt in my mind... BUT I think I should not look elsewhere and confirm this as L. atlanticus!

Thank you.

Here Limacella is scarce-frequent and I think there is a single species. It is in the whereabouts of L. furnaceae or L. subfurnaceae, but I can't get the right knowledge how to differentiate between, if ever they are really different. I have plenty of material (exsiccata), images and micro-data to share if someone like Mollisia whish to investigate further. The ones I found are almost always associated with leaf/branch litter of carob trees. The smell is really distinct !

At this stage, I am sure that the genus is Pseudobaeospora (family Tricholomataceae) - hence that is already an equalizer
Regarding the species, that is a challenging task, and I try to get as much info as possible, but I already pinned P. albidula and P. calcarea are at the moment the strongest options.

(PDF) Pseudobaeospora albidula (Agaricales) found in the Czech Republic

This paper has an interesting discussion opening to further research and options, from a possible new species that gros on leaf litter of broad leaf trees (spec. to carobs?) because from what I gather, these 2 species prefer to grow on moss.

Then this is also interesting:

Pseudobaeospora paulochroma and P. bavariae differ from P. albidula and P. calcarea in a positive (ie yellow or pale sordid yellowish) reaction of the pileus surface with KOH. Pseudobaeospora terrayi has a mild taste and therefore dif - fers by a pale yellowish greenish reaction of the pileus surface with KOH and by the presence of well-developed suprapellis.

(14) (PDF) Pseudobaeospora albidula (Agaricales) found in the Czech Republic . Available from: (PDF) Pseudobaeospora albidula (Agaricales) found in the Czech Republic [accessed Nov 03 2021].

I judge a positive pale sordid yellowish reaction in my specimen (see photo above)!

Some micro images (not much to show!)

good evening mycophiles

This fungus is the same that I reported weeks ago but here it is from a different location:

Small white mushroom, with a tomentose covering

These are the new images taken yesterday.

MACRO:

Small basidiocarps with a tomentose veil, hence tomentose cap and ring.

Gregarious or fused at the base

Lamellae free but very close to the stipe

Taste fungoid-sweet, good and palatable

Scent indistinct

Stipe white, but sometimes greyish esp. after handling

Pruinose-puberulent esp. above the ring

Stipe hollow, inside there are longitudinal white fibres (not sure if it is a characteristic of species)

Base slightly swollen in solitary examples

Ring slowly evanescent, leaving a cottony scar

Spores hyaline, don't stain easily.

4% KOH on stipe forms a faint yellowish colour (with a hint of greenish tones?)

MICRO (quite boring)

Cheilocystidia and pleurocystidia not observed

Distinct feature: Spores 2.0-3.0 um which aggregates in pairs or clusters, pip-shaped.

Basidia 4-spore (I managed to see one!)

Veil (or pileipellis) trichoderm of cylindrical hyphae, a few with clamp junctions, unspecialised

Steve vs White fungus with ring: 0-1 in 2018!

Now I met the same fungus in the same locality and even almost the same date (23/10/2018) and I want to rechallange and try to identify this cute and curious species. I just came from the forray (super tired!) and still have my camera in the bag, but these are the images from 2018. I will document gradually this fungus here. It is small (2 cm) and grow in small clusters, with the base of the stipe fused / connexed. I am quite sure that the habitat is leaf litter of Quercus ilex or Ceratonia siliqua, not connifer ( pine leaves present in pic). Investigation for tonight or tmrw!

To be continued...

Ah ok for the BWB Strange u have that violet tinge, but I have to say that it did not stain the spores very well, so better you buy a fresh supply. It is not expensive. IN my humble opinion it should stain both in acid and in water but it does not work well when the pH is slightly alkaline (unlike Congo red). In pH > 10 or so it will precipitate or form some blackish colour if my memory is still good. Well ... just buy a new BWB and see if u can compare the spores of the same sample

Thank you Tuppie - enigma solved!!! I decrease the temp to 40C.

Good day!

Dear friends. Some years ago I built my own desiccatorfresh with temperature control, light, fan, etc. I wanted to ask if 42-49C is the ideal temp to desiccate fungi in a challenging climate with humidity >75% and warm winter temperatures where infections from moulding parasites are not uncommon. Is >50C to high that damages the hyphae/cystidia? TNX

P.s. I place the fresh fungi inside, and those dry I keep them on the lid while working with them which is pretty warm until I am ready and store them in boxes later on.

I had fair success in my last staining of S. crinitia with LACB - Lactic Acid Cotton Blue (what is BWB dear german folks!). Dont mind my question, just a re-assurance, is yr stain truly cotton blue or cresyl / methyl blue? It has that violet tinge which is not typical of cotton blue which is more pure blue. I applied white balance to yr image and there is still the violet hue evident.

Second point, be sure you focus away from the equatorial plane hence yr focus must be on the surface of the spore. I see thick wall perimeter meaning you are focusing inside the spore. One trick is to photograph a mass of spores clumped together and you will hit a bit of everything focus-speaking. My before-last image (no.5) is for example not focused in the right place, yet the perimeter seems nicely focused

Third, the common S. crinita (kindly confirmed for me by Nobi) has very fine punctations / ridges that are difficult even at x1000.

Finally don't be afraid to experiment with post-editing images (enhancing contrast) - see last image and compare the difference with untouched images.

Zitat von Tuppie

The Americans aptly call such a workshop located in a branch (or simply a place for undisturbed reading) a “she shed”.

Well, it reminded me about the fine interiors of a hobbit home in lord of the Rings