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17-03-2024 15:50

Hardware Tony Hardware Tony

Found on last year's grass sps. on damp soil, I ha

18-03-2024 22:12

Charles Aron Charles Aron

Hi All, Another dessication-tolerant Orbilia, thi

17-03-2024 13:15

Patrice TANCHAUD

Bonjour, tous les ans je vois cette espèce sur P

18-03-2024 16:39

Juuso Äikäs

Hello,today I found a few scattered Orbilia fruitb

18-03-2024 12:24

Castillo Joseba Castillo Joseba

Me mandan el material de Galicia,  recolectsada e

18-03-2024 14:41

B Shelbourne B Shelbourne

• Polydesmia: Distinctive macro, mostly on strom

16-03-2024 20:17

éric ROMERO éric ROMERO

Bonjour, J'ai besoin de votre aide pour ce Mollis

17-03-2024 20:58

Stefan Jakobsson

For a few days we had temperatures above freezing

17-03-2024 13:00

éric ROMERO éric ROMERO

Bonjour, Apothécie sessile, hémisphérique, jau

17-03-2024 18:00

Margot en Geert Vullings

We found these black fungi on a fallen twig of mos

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mollisioid mystery
Chris Yeates, 18-09-2018 15:33
Chris Yeates
Bonjour tous

Normally I steer clear of this daunting group, but a recent collection with abundant apothecia was too tempting.

Apothecia densely gregarious; with a margin only when very young then plane; pale grey with some turning pale yellowish-brown. No reaction to KOH. Scale bar in photograph = 1mm.

Paraphyses with no vacuolar contents - apparently completely "empty" (hence my confusion). Scale bar in photograph = 10µm.

Asci 8-spored, IKI bb, apparently with croziers; occasionally a "Psilachnum body" was observed.

Ascospores ovoid-ellipsoid, occasionally slight fusoid, guttules as in photograph. Scale bar in photograph = 10µm.

Any suggestions very welcome.

Chris
  • message #54680
  • message #54680
  • message #54680
  • message #54680
Hans-Otto Baral, 18-09-2018 16:16
Hans-Otto Baral
Re : mollisioid mystery
Hi Chris
does the fungus also have a substrate? :-)

The living paraphyses look "empty", so logically the KOH reaction is negative.

This should be a Pyrenopeziza. The small spores appears to point to P. aquosa. That species has typically the Psilachnum-drop.
Zotto
Chris Yeates, 18-09-2018 17:44
Chris Yeates
Re : mollisioid mystery
Thanks for the quick response Zotto.

Here are photo's showing the collection site. The fungus was growing on the underside of a piece of decorticated wood - I assumed, from this area of Quercus - lying at the side of a long-disused concrete track at the edge of woodland.

I had assumed Pyrenopeziza but couldn't immediately think of lignicolous ones, and of course older works still put aquosa in Mollisia.

I think P. aquosa is definitely in the right area. I have quickly looked through the long and interesting http://www.ascofrance.com/search_forum/27917 thread, where the question of "Mollisia" dextrinospora is raised. I too think Ellis and Ellis's Mollisia aquosa is something different - the marginal cells on my fungus were only slightly larger and more enlarged than the rest of the excipulum, rather like your HB 7640. By contrast E & E's fungus has distinctly elongated marginal cells.

Best wishes

Chris
  • message #54684
  • message #54684
Hans-Otto Baral, 18-09-2018 17:55
Hans-Otto Baral
Re : mollisioid mystery
Yes there were some questions.....