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22-04-2026 20:54

Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

25-04-2026 11:34

Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

24-04-2026 03:16

David Chapados David Chapados

Found while looking at something else from wood in

22-04-2026 01:06

Richard VALERI Richard VALERI

Bonjour à tous.Je vous présente cette Nectria s.

22-04-2026 20:17

Marian Jagers Marian Jagers

Is anyone familiar with the Hyphomycetes genus Pse

23-04-2026 06:46

François Freléchoux François Freléchoux

Bonjour, Voici la description d'un minuscule asco

21-04-2026 22:14

Margot en Geert Vullings

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

22-04-2026 19:12

Louis DENY

Bonjour forum.Trouvé à Belfort, est de la France

21-04-2026 21:00

Sylvie Le Goff

Bonjour à tousJe sollicite votre aide pour cet as

21-04-2026 13:36

Gernot Friebes

Hi,I am out of ideas for this one. I collected Sal

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Acorn fungus
Guy Buddy, 19-10-2020 22:24
Good evening,
This is a common cup on Quercus acorns in Pennsylvania, USA. Medullary excipulum looks textura intricata while ectal looks angular to globose. Paraphyses filiform, septate, some forked, with small oil drops. Asci weak IKI +, no croziers. Spores measure 35.4 × 6.1 µm.
Thanks,
Devin
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Guy Buddy, 19-10-2020 22:25
Re : Acorn fungus
more pics
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Hans-Otto Baral, 20-10-2020 08:40
Hans-Otto Baral
Re : Acorn fungus
We had this fungus a few days ago: http://www.ascofrance.fr/search_forum/65321

It is Phaeohelotium geogenum (Cooke) Svrcek & Matheis, but perhaps better placed in Cudoniella.

The type is from near Paris and the type of the synonym Helotium longisporum Schweers from Netherlands.

Typically it grows on remnants of Quercus, preferably acorns.

From your scale I find the spores 30-38 x 5.3-6 µm.

Zotto
Guy Buddy, 20-10-2020 15:49
Re : Acorn fungus
Thanks Zotto for sharing your braincyclopedia.
Devin