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31-10-2024 22:25

Karen Poulsen

Hello, On half weathered Betula leaf, I noticed t

31-10-2024 21:42

Karen Poulsen

Hello, On last year's pine needles on the ground

31-10-2024 04:07

Francois Guay Francois Guay

Last week, I found what appears to be an Amicodisc

28-10-2024 17:51

B Shelbourne B Shelbourne

• Macro and habitat suggest Hymenoscyphus s.l.,

24-10-2024 23:07

Patrice TANCHAUD

Bonsoir, récolte réalisée sous hêtres et chê

28-10-2024 23:30

Marc Detollenaere Marc Detollenaere

Dear Forum,I found some small fruit bodies of abou

24-10-2024 14:39

Jean-Luc Ranger

Bonjour à tous,Découvert sur un terrain calcaire

23-10-2024 17:27

Enrique Rubio Enrique Rubio

Hi againThese tiny apothecia (100-200 µm) were gr

25-10-2024 02:15

B Shelbourne B Shelbourne

• Very few macro characters and I initially thou

26-10-2024 16:19

Juuso Äikäs

Yesterday I found some small white Helotiales grow

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unknown Helotiales?
Björn Wergen, 13-10-2011 09:44
Björn WergenHello again,

this finding seems to be an inoperculate contrary to my mysterious Pezizales, which is perhaps somewhere between Boubovia and Sphaerosporella. It grows on wood of hardwood (Quercus?) and forms brownish-ochraceous fruitbodies which are 2-5 mm broad. There is no stem.
The microscopic features are:
Spores fusiform, very variable in size and form, with a thin gelatinous sheath, hyaline, permanently with 2 bigger oil droplets, 14-20x4-7µm. Asci with 8 spores, short stalked, without croziers, 110-130x8-10µm. Paraphyses with strongly refractive guttules, especially in the apical part, septate and branched. No hairs. Ascus apex in Lugol blue. 

If more information is needed, tell me, I have the finding right here in a plastic box ;)

lg kazyua
  • message #16424
  • message #16424
  • message #16424
Hans-Otto Baral, 13-10-2011 12:12
Hans-Otto Baral
Re : unknown Helotiales?
Hi Kazyua :-)

very fine presentation! Clearly a Hymenoscyphus s.l. (Phaeohelotium). I assume you are sure there is not long stalk hidden in the substrate (that is sometimes overlooked).

The spores do not look very variable. Are you sure with the absent croziers? I would be surprised but this is very important. I thought it could be H. epiphyllus or H. monticola, but I am not very happy with my idea.

A section of the margin and flanks would perhaps also help

Zotto
Björn Wergen, 13-10-2011 15:12
Björn Wergen
Re : unknown Helotiales?
Hi Zotto,

I tried to find some croziers but I did not have success with it. I also thought about a Hymenoscyphus, the size and shape remembered me on H. epiphyllus, but I know this specimen more yellowish...

I will try to make some more photos if there will be the time for it.

regards
kazuya
Hans-Otto Baral, 18-10-2011 19:41
Hans-Otto Baral
Re : unknown Helotiales?
Hi Kazuya

when looking again at your fungus I am sure that it is Hymenoscyphus fulvidulus. This species is somewhat variable, from brownish to grey, but the features all fit including absence of croziers and strongly refractive VBs in the paraphyses.

Zotto
Björn Wergen, 18-10-2011 19:48
Björn Wergen
Re : unknown Helotiales?
Hi Zotto,

many thanks. I didn't check this species again, so I am sorry that I cannot give you some more details.

lg kazuya