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21-09-2017 08:27


Bonjour à tous,Ci-joint ce que je pense être un

20-09-2017 11:27

Edvin Johannesen Edvin Johannesen

This Hymenoscyphus (?) was found on Gymnocarpium d

10-09-2017 20:58


Sur laissée de sanglier, en pessière fraîche.

13-09-2017 08:09

Ethan Crenson

Hello,In the Bronx, Pelham Bay Park, New York, US.

20-09-2017 13:32

Viktorie Halasu Viktorie Halasu

Hello forum,last week I finally found a Smardaea b

16-09-2017 12:45

Lothar Krieglsteiner Lothar Krieglsteiner

... collected this week in Nature Reserve "Žofín

18-09-2017 23:14

Philippe Louasse

Bonsoir à tous, Les 9èmes Journées mycologique

12-08-2014 11:56

Zuzana Egertova Zuzana Egertova

Hello, in this ascomycete everything seems to fit

18-09-2017 17:54

Rubén Martínez Gil Rubén Martínez Gil

Hola a todos. Estoy buscando este artículo: Med

21-08-2017 01:44

Ethan Crenson

In the Green Mountains of Southern Vermont, US. 

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Rhytismatales on Ribes
Marja Pennanen, 15-07-2017 23:16
Hello forum,

I collected some hyaloscyphaceae on the leaves of Ribes nigrum. On stereomicroscope I noticed something growing on the stem of a leaf. Sorry about the quality of photos, should try again tomorrow.

The apos are about 0,5-1mmx0,5 mm and very hard to see because of the dark grey colour and are propably visible only, when wet.
The spores are about 7-9x2 and asci 50-60x6-8, Iki blue.
Paraphyses are practicly not exceeding the asci and may be a bit curved, about 2 at the top.

I suppose, that this is a representative of some Rhytismatales, but found absolutely nothing fitting to these characters. Maybe someone here can help me...

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Hans-Otto Baral, 16-07-2017 07:35
Hans-Otto Baral
Re : Rhytismatales on Ribes
Hi Marja
can you exclude a Pyrenopeziza? Reminds me of P. petiolaris on Acer petioles.
Marja Pennanen, 16-07-2017 13:59
Re : Rhytismatales on Ribes
Dear Zotto,

these definitely grow under surface.  They really are visible only, when wet. I took many more photos, but these seem to try to avoid to be revealed ;)

The paraphyses are curved at the top and septate and seems to exceed at least young asci.

Could this be a Hypoderma species?

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Hans-Otto Baral, 16-07-2017 21:02
Hans-Otto Baral
Re : Rhytismatales on Ribes
Now I see a strongly hooked paraphysis also in your first series of images which rules out my suggetsion. Sorry, the quality is too low. The paraphyses aren't multiguttulate?
Marja Pennanen, 17-07-2017 13:38
Re : Rhytismatales on Ribes
Hi Zotto,

I supposed, that there were septas in paraphyses, but they may as well be guttules. I have these drying now, so I should collect more, but have not time now. My granddaugter is going to visit us and I surely have to move many things away from her curious eyes and fingers...