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17-10-2018 07:10

Ethan Crenson

In Northeastern North America.  On the banks of a

15-10-2018 18:55

hannie wijers

Hello, I'd like some help if possibleIn Beilen I

16-10-2018 23:33

Valencia Lopez Francisco Javier

Hola a todos/asPeziza recolectada en el sur de Esp

03-10-2018 22:13

François Bartholomeeusen

Good evening forum members,Can this be Hyalorbilia

14-10-2018 19:25

Marja Pennanen

Hi, on a Populus leaf among other things, I found

15-10-2018 10:52

Castillo Joseba Castillo Joseba

Del pasado sabado en bosque de avellanos,   pare

14-10-2018 22:24

Castillo Joseba Castillo Joseba

De ayer sobre tierra en terrenos de cultivo con av

10-10-2018 23:11

Viktorie Halasu Viktorie Halasu

Hello forum,I would like to ask how to call correc

12-10-2018 20:15

Thorben Hülsewig

Hi there,two week ago i found this asco on pine co

12-10-2018 05:29

Danny Newman Danny Newman

Substrate/Host: on hollow, herbaceous twig in a ro

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