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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
  • message #85113
  • message #85113
  • message #85113
  • message #85113
  • message #85113
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 different colors, 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