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09-01-2026 17:41

Arnold Büschlen

Hallo, F. dilatata wird von vielen Bryoparasiten

10-01-2026 20:00

Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

07-01-2026 22:22

Danny Newman Danny Newman

Tatraea sp. on indet. hardwood The Swag, Great Sm

10-01-2026 01:18

Danny Newman Danny Newman

cf. Neovaginatispora fuckelii on indet. shrub Pre

07-01-2026 10:24

Danny Newman Danny Newman

Pezicula sp. on indet. hardwood Appalachian Highl

09-01-2026 10:08

Blasco Rafael Blasco Rafael

Hola, en el mismo habitat que la anteriorRetamaDia

08-01-2026 21:22

Blasco Rafael Blasco Rafael

Hola, He recogido esta muestra de Orbilia sobre Re

07-01-2026 17:29

Marc Detollenaere Marc Detollenaere

Dear Forum,On a barkless Populus I found some smal

10-11-2021 17:33

Riet van Oosten Riet van Oosten

Add-on topic http://www.ascofrance.com/forum/7059

07-01-2026 10:05

Danny Newman Danny Newman

cf. Chaetospermum on XylariaCosby Campground, Grea

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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