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27-10-2025 15:29

A new find for a Calycina on Rubus
Michel Hairaud Michel Hairaud

Bonjour à tous, Avec Elisabeth Stöckli nous avo

26-10-2025 13:39

Unknown ascomycete.
Joaquin Martin

Hi,I found this fungus in a mixed forest of spruce

27-10-2025 10:05

Pulvinula sp.
Tripodi Mario

Hello everyone,on October 25th, 2025 I found this

27-10-2025 00:34

Strange asco on Quercus acorn
Francois Guay Francois Guay

I found this strange species in Québec,Canada, gr

26-10-2025 21:23

Pale Hymenoscyphus on leaf
Juuso Äikäs

Hello, a couple weeks ago I found some pale, whit

26-10-2025 12:01

Blanc en troupe sérrée
Louis DENY

Hello forum,Trouvé à Belfort (400m) sur tige her

23-10-2025 20:59

Spores Aleuria cestrica & luteonitens
Patrice TANCHAUD

Bonsoir, est-ce que quelqu'un posséderait un com

24-10-2025 14:50

anamorph and teleomorph Apiospora
Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, Oct. 2025

24-10-2025 03:11

Unidentified asco on decaying wood
Francois Guay Francois Guay

I found this fungus growing on decaying conifer wo

20-10-2025 09:36

Searching for an article, Benedix 1962
Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for the following article:Bene

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Hymenoscyphus calyculus?
Zuzana Sochorová (Egertová), 01-10-2025 20:16
Zuzana Sochorová (Egertová)Hello,
I would appreciate your opinion on this yellow Hymenoscyphus growing on a little twig, maybe of Rubus idaeus.

Asci 114-125 x 11-12 µm, H+, bb.

Ascospores (16.6) 17.7-19.2-20.8 (23.1) × (4.2) 4.3-4.7- 5 (5.9) µm, Q = (3.37) 3.70-4.07-4.54 (4.94), without cilita, not septate.

Paraphyses with strongly refractive guttules. 
Using Bernard´s key, I have arrived to H. calyculus, but OCl is lower than 5 (but many pictures at the internet also show spores with lower OCl).

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Zuzana Sochorová (Egertová), 01-10-2025 20:18
Zuzana Sochorová (Egertová)
Re : Hymenoscyphus calyculus?
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Hans-Otto Baral, 01-10-2025 20:58
Hans-Otto Baral
Re : Hymenoscyphus calyculus?
Hi Zuzana

it is curious that H. calyculus is so rarely recorded, when I began with Helotiales about 50 years ago I thought that it is a common species. 

No, the spores here are not really scutuloid. Some of them have a recognizably upper and lower end, but there is no clear asymmetry at the upper apex.

It must be H. epiphyllus.

The stalk here is never higher then wide, while in H. calyculus it can be >5x longer than wide.

Zotto
Zuzana Sochorová (Egertová), 01-10-2025 22:15
Zuzana Sochorová (Egertová)
Re : Hymenoscyphus calyculus?
Hi Zotto,
thank you very much.
I have ommited Phaeohelotium and went directly to Hymenoscyphus...
Z