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21-04-2026 22:14

Peziza
Margot en Geert Vullings

This cup fungus was found on April 10, 2026, on lo

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Peziza
Margot en Geert Vullings, 21-04-2026 22:14
This cup fungus was found on April 10, 2026, on loamy soil.
Diameter 4 cm. No moisture observed upon damage.
Outer surface light brown, slightly rough and white at the attachment. Inner surface light brown. Hymenium:
Cross-section is white, ectal excipulum resembling textura intricata, medullary excipulum with large round cells.
Asci: Measured in water: Me = 358.1 × 12.8 µm Croziers +, J + WTR type.
Paraphyses: Cylindrical with septa and guttules.

Spores: With loose medium-sized warts, not connected, sometimes somewhat closer to the poles. Sometimes with 2 large droplets, but most still developing? Measured in water: (14.7) 14.9 - 16.7 (17.3) × (8.4) 8.7 - 9.9 (10) µm, Q = 1.6 - 1.8

We would like to know which cup fungus this could be?

Thank you very much in advance, Geert & Margot
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Nicolas VAN VOOREN, 22-04-2026 14:37
Nicolas VAN VOOREN
Re : Peziza
The amyloid reaction of asci is WT type. And the ascospores contain BSG (bipolar spore granules).
These two characters point to Phylloscypha.
I let you identify the species with the key to this genus.
Margot en Geert Vullings, 22-04-2026 17:41
Re : Peziza
Thank you very much for your help.

We do not see the nice round warts of P. labessiana, but sometimes elongated warts; we do not see spores with tapered ends or elliptico-fusoid, so there is some doubt, but we think using the key this could be P. phyllogena?

Kind regards, Geert & Margot

Marek Capoun, 22-04-2026 22:31
Marek Capoun
Re : Peziza
I know P. phyllogena with entirely different colours, different spore shape and higher Q value. I can't think of anything other than P. labessiana, although I have no personal experience with it.
Greetings,
Marek
Nicolas VAN VOOREN, 23-04-2026 07:50
Nicolas VAN VOOREN
Re : Peziza
I agree with Marek, the spore ornamentation of P. phyllogena is different.
Margot en Geert Vullings, 23-04-2026 08:36
Re : Peziza
Thank you very much to both of you; we were hesitant partly because this species does not seem to be known in the Netherlands yet, even when looking at synonyms?

Kind regards, Geert&Margot
Patrice TANCHAUD, 23-04-2026 09:58
Re : Peziza
Bonjour,

je ne remets pas en question l'identification, mais je voyais P. labessiana nettement plus sombre avec des ponctuations sur la face externe rappelant P. boltonii, ayant en tête les photos publiées dans Ascomycetes.org 13 fasc. 3 de 2021.

Patrice
  • message #85141
Marek Capoun, 23-04-2026 11:10
Marek Capoun
Re : Peziza
I remembered one very bright "Peziza", which Stano Glejdura determined as P. labessiana...

https://www.nahuby.sk/obrazok_detail.php?obrazok_id=385138&poradie=1&form_hash=2229c9494ab28c50aa22526e589caa48