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17-04-2026 19:16

Enrique Rubio Enrique Rubio

Hi to everybodyI would appreciate any assistance r

14-04-2026 05:32

Ethan Crenson

Hi all, A few weeks back a friend pointed out som

17-04-2026 15:14

Bruno Coué Bruno Coué

Bonjour.Récoltes du 16/04/2026, sur feuilles mort

12-04-2026 15:52

Gernot Friebes

Hi,I'm looking for help with this anamorph collect

14-04-2026 21:52

Gernot Friebes

Hi,found on dead leaves of Carex elata. Conidia: 4

16-04-2026 22:09

Buckwheat Pete

Hello, I'd like to ask about this older specimen:

15-04-2026 19:33

Fátima Durán Manzaneque

Hi!! I need help, I found this Ascomycete but I d

14-04-2026 20:31

Gernot Friebes

Hi,can this be Psilachnum lateritioalbum on Phragm

12-04-2026 17:56

Hardware Tony Hardware Tony

Found on dead stems in February earlier this year

12-04-2026 12:22

William Slosse William Slosse

In a dune grassland in Oostduinkerke (Belgium), on

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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