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01-01-2014 19:04

Chris Yeates Chris Yeates

Bonsoir tous - and Happy New Year!I collected this

30-12-2013 10:29

Patrice TANCHAUD

Bonjour,récolte réalisée sur le littoral, sur d

01-01-2014 19:33

Caroline Hobart

Dear Ascofrance community, It is disappointing

29-12-2013 23:40

Maren Kamke Maren Kamke

Hi everybody,I found this one on decidious wood. T

31-12-2013 11:00

Alan Rockefeller Alan Rockefeller

Growing on Acer macrophyllum (bigleaf maple).  Se

31-12-2013 01:28

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos.El pasado sábado encontramos esta Ot

30-12-2013 19:13

Patrice TANCHAUD

Bonsoir,chaque hiver, sur différentes mousses (li

30-12-2013 23:32

Pavol Palo

Hi everybody, I found this one on decidious wood

28-12-2013 23:24

Michel Hairaud Michel Hairaud

Bonsoir à tous, Hi to everyone,Pour la 2eme anné

30-11-2013 00:23

Elsa Sousa

Hi,Could somebody give me any clues of possible ge

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Geoglossum confirmation please
Chris Yeates, 01-01-2014 19:04
Chris YeatesBonsoir tous - and Happy New Year!
I collected this on a mossy lawn (slightly acidic grassland) on Christmas Day (it has stayed mostly frost-free here - so far!). It seems to key out fine to Geoglossum fallax, especially with regard to characters of the paraphyses tips, which have relatively few septa and are embedded in a brown matrix, and of the spores which are rather slender and tapering at their bases.
But this collection of G. fallax on ASCOFrance http://www.ascofrance.com/search_recolte/1567 looks rather different.
Am I missing something?
Cordialement
Chris
  • message #26507
Martin Bemmann, 01-01-2014 19:22
Martin Bemmann
Re : Geoglossum confirmation please
Hi Chris,

stipe is hairy? If so check Trichoglossum (hirsutum). Spore length would fit better. Can you count the septa?

Regards
Martin
Chris Yeates, 01-01-2014 19:33
Chris Yeates
Re : Geoglossum confirmation please
Hi Martin
the stem has tufts of hyphae, but no setae either on stem or in hymenium;
spores with 7 to 12 septa
best wishes
Chris
Martin Bemmann, 01-01-2014 20:04
Martin Bemmann
Re : Geoglossum confirmation please
Hi Chris,

sorry I ignored the paraphyses. With checking more keys (Maas-Geesteranus, Priou, Olsen etc.) I come to G. fallax too. Though spore size varies.

Regards,
Martin
Michel Hairaud, 01-01-2014 20:58
Michel Hairaud
Re : Geoglossum confirmation please
Hi Chris, Martin and all, 

I would also go for G. fallax. Paraphyses tips are often more curved as inthe pic I attach  . 
Another regular character for fallax is that spores (even freed) are often not mature and then hyalin  

Amitiés
Michel
  • message #26513
  • message #26513
Hans-Otto Baral, 01-01-2014 20:59
Hans-Otto Baral
Re : Geoglossum confirmation please
Hi

G. fallax is a species that shows the rather rare feature that the spores are ejected when still hyaline. Look at my drawing Geoglossum fallax, HB 6546.JPG with turgescent ascus. In the centre of your collage I see a living ascus with hyaline spores. If you saw these often enough and never brown when turgescent then I have no doubt.

Spores on my drawing are 70-106 x 5-6.5 µm, with 8-12 septa, so fit perfectly.

For the specimen from 2006 (Ascofrance) I am not sure.

Zotto
Chris Yeates, 01-01-2014 21:40
Chris Yeates
Re : Geoglossum confirmation please
Martin, Michel and Zotto
thank you for these helpful comments
amitiés
Chris