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14-12-2023 16:51

Khomenko Igor Khomenko Igor

Hi, I found these black cup fungi on recently brok

12-12-2023 18:18

Matthias Reul Matthias Reul

Hi altogether,a few weeks ago Torsten Richter foun

07-12-2023 11:22

Pierre-Yves Julien

Bonjour à tous, En étudiant un Pulvinula, j'ai

12-12-2023 23:18

Wim de Groot

I know, not enough details. But nevertheless I hop

13-12-2023 11:05

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous identifier

13-12-2023 12:10

Giovanni ANTOLA Giovanni ANTOLA

Bonjour,Je souhaiterais connaître votre avis sur

12-12-2023 14:43

Margot en Geert Vullings

We found these very small flattened "balls" on old

12-12-2023 11:28

Patrice TANCHAUD

Bonjour, sur mélange de fumier et débris de boi

09-12-2023 20:57

Wim de Groot

We found these little stalked discomycetes on a ra

09-12-2023 10:26

Pablo P. Daniëls

Buenos días,Encontré un lophodermium en las hoja

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Geoglossum sp. x2
Andy Overall, 24-12-2014 15:34
Would somebody be able to give me some assistance with these two Earth Tongues please. I have provided in situ shots and micro images of spores, asci and paraphyses. The fruit bodies were from different sites around Hampstead Heath. The first image on sandy soil among mosses in short grass, dry throughout..45-55mm x 2-3mm. The spores of the first specimen seemed to be late in forming septa, the paraphyses are straight with slightly swollen tips and septate in some. The second specimen has early forming septa and hosiery-like paraphyses. The second was growing in similar conditions to the first, is slightly taller and maybe a little wider. The photo of the 2nd fruit body is terribly out of focus, apologies..... I've only included it to give some idea at least of shape. This was dry throughout also. What I find intriguing about the second specimen is the constricted areas between septa on the spores, and the spear headed-like spores inside one of the asci..thanks in advance.
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Hans-Otto Baral, 24-12-2014 17:35
Hans-Otto Baral
Re : Geoglossum sp. x2
Hi Andy

I think this need images of more and well-developed spores. I do not know what these spores with constrictions are. They look more like conidia.

Important is to look at living asci. is your material  still fresh? Take photos of asci with spores inside, and do not apply any pressure. Then you hjave the chance to see many turgescent asci. It is possible that your first specimen concerns G. fallax. if so the spores must be hyaline inside the living asci and turn brown only a reasonalbe time after ejection (or within dead asci). Most other Geoglossums eject brown spores.

Zotto
Andy Overall, 24-12-2014 18:05
Re : Geoglossum sp. x2
Thanks Otto,

The material is fairly fresh, I have been keeping them in the fridge, would this effect the structures adversely in any way?  The first specimen shows dark spores in the ascus, 1st image below, the second, for the second species, shows hyaline spores in the ascus. Would you have any idea as to what the spear-headed looking spores in the ascus of the second image may be?  Andy
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Hans-Otto Baral, 25-12-2014 09:25
Hans-Otto Baral
Re : Geoglossum sp. x2
The left images shows a dead ascus. So this says little.

The tow asci right look alive, so they might eject hyaline spores. I never saw such swollen spore apex in Geoglossaceae. Maybe this is caused by the fridge?

here living asci that eject living spores (G. cf. hakelieri, phot. B. Fellmann).

Zotto
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Andy Overall, 25-12-2014 11:01
Re : Geoglossum sp. x2
Thanks Otto,  thats most useful.  Happy Christmas from London :-)