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24-12-2014 15:34

Andy Overall

Would somebody be able to give me some assistance

24-12-2014 20:01

Blasco Rafael Blasco Rafael

Felices fiestas para todos y prospero 2015.a ver s

23-12-2014 20:05

Chris Yeates Chris Yeates

Bonsoir tousfirstly may I apologise for moving Zot

23-12-2014 16:28

Hans-Otto Baral Hans-Otto Baral

Hello, dear all togetherI am very sorry for this d

22-12-2014 22:31

Alain GARDIENNET Alain GARDIENNET

Bonsoir forum, J'ai trouvé sur graminée des ama

13-12-2014 21:52

Vasileios Kaounas Vasileios Kaounas

Found 10-12-14, in Cistus incanus in forest with P

12-12-2014 13:06

Blasco Rafael Blasco Rafael

Hola esta Peziza estaba en el mismo habitat que la

20-12-2014 08:29

Blasco Rafael Blasco Rafael

Hola, tengo esta muestra sobre excremento de Conej

20-12-2014 18:45

M Jonathan M Jonathan

searching for that paper.  Revista de micologia E

20-12-2014 18:45

M Jonathan M Jonathan

searching for that paper.  Revista de micologia E

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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 :-)