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21-04-2026 13:36

Wentiomyces-like on Salix
Gernot Friebes

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

21-04-2026 13:19

Lophodermium on Typha
Gernot Friebes

Hi,this Lophodermium on Typha has ascospores measu

21-04-2026 13:05

Hyphomycete on Typha
Gernot Friebes

Hi,this hyphomycete feels familiar but I was not a

20-04-2026 22:00

Trichobolus dextrinoideosetosus?
Malcolm Greaves Malcolm Greaves

These pale yellow, hairy ascos were growing on cul

19-04-2026 21:23

Hairy anamorph on plywood with beaked curved conidia
Steve Clements

Bonjour, I found this anamorphic fungus on old pl

19-04-2026 20:46

Anamorphic fungus on plywood
Steve Clements

1 mm diameter approx spherical conidiophores on pl

12-04-2026 17:56

Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Hardware Tony Hardware Tony

Found on dead stems in February earlier this year

17-04-2026 19:16

Small dark synnemata on rotten hardwood
Enrique Rubio Enrique Rubio

Hi to everybodyI would appreciate any assistance r

14-04-2026 05:32

Pyrenomycete with yellow subiculum on Aralia
Ethan Crenson

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

17-04-2026 15:14

sur feuilles de Luzula
Bruno Coué Bruno Coué

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

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Elaphomyces cyanosporus ou persoonii
Nicolas VAN VOOREN, 01-12-2012 18:01
Nicolas VAN VOORENBonjour.
On m'a confié la détermination d'un Elaphomyces récolté ces jours sous Quercus pubescens, mesurant 18-30 mm de diamètre. J'hésite fortement entre deux taxons : E. cyanosporus et E. persoonii.
Quels sont les critères objectifs pour séparer ces deux espèces ?
  • message #20598
  • message #20598
Alessio Pierotti, 01-12-2012 20:57
Alessio Pierotti
Re : Elaphomyces cyanosporus ou persoonii
Nicolas in the attachment you have a recent work about Elaphomyces cyanosporus
Enrique Rubio, 01-12-2012 21:37
Enrique Rubio
Re : Elaphomyces cyanosporus ou persoonii
Elaphomyces persoonii is a bigger and rare species with a conspicuous greenish yellow mycelial involucre and  it has an unpleasant aliaceous odour.
Elaphomyces cyanosporus lacks this involucre (or it's blueish and inconspicuous) and their smell is pleasant, like Tuber melanosporum.
I think your fungus is E. cyanosporus 
See my cards in Ascofrance
Nicolas VAN VOOREN, 02-12-2012 09:32
Nicolas VAN VOOREN
Re : Elaphomyces cyanosporus ou persoonii

Thank you all.
So the macro characters of this collection correspond to E. cyanosporus.

Enrique Rubio, 02-12-2012 13:26
Enrique Rubio
Re : Elaphomyces cyanosporus ou persoonii
Moreover E. persoonii has great black pyramidal scales on the peridium, whereas them of E. cyanosporus are small and rather smooth or aplanate.
Yes, I think is E. cyanosporus
Pierre-Arthur Moreau, 03-12-2012 15:34
Pierre-Arthur Moreau
Re : Elaphomyces cyanosporus ou persoonii
Bonjour Nicolas et tous,
Je pense aussi à E. cyanosporus, et j'en profite pour joindre le pdf d'un article paru récemment dans le Bulletin FAMCAL sur les Elaphomyces, avec une clé à tester...
Amitiés, Pierre-Arthur