Accès membres

Mot de passe perdu? S'inscrire

10-09-2025 23:53

Marcel Heyligen Marcel Heyligen

Found on Robinia pseudoacasia together with Diapor

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

10-09-2025 17:18

Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

02-09-2025 11:34

Thomas Læssøe

https://svampe.databasen.org/observations/10527903

07-09-2025 08:19

Josep Torres Josep Torres

Hello.Tiny pinkish discomycetes, photographed and

09-09-2025 12:07

Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

08-09-2025 19:07

ruiz Jose

Hola me pasan esta recolecta en madera de fraxinus

03-09-2025 21:59

Philippe PELLICIER

La Léchère, Col de la Madeleine, alt 1970m, au s

06-09-2025 21:40

David Chapados David Chapados

Hi, Does somebody know the genus that has those b

07-09-2025 11:34

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I have identified this fungus as Hymenoscyph

« < 1 2 3 4 5 > »
Yellow Otidea
Viktorie Halasu, 03-08-2016 00:25
Viktorie HalasuHello all,
could you please help me with this nice Otidea?

Found at a forest path, close to the city, nitrogen rich soil (Urtica, Impatiens sp.), young deciduous trees around.
Young apothecia lemon yellow, older (and dryer) discoloring to light yellow-ochre with a bit more yellow hymenium. Cup up to 30 × 15 mm, stem cca 10 × 3-6 mm.
Receptacle slightly wrinkled, no ribs, fine furfuration in the same color.

Sp. oblong, *(9,8) 10,3-11,5 (11,8) × (4,9) 5,4-5,8 (6) um, Me = 10,8 × 5,5 um, Q = (1,7) 1,8-2,1 (2,3), Qe = 2.
Paraphyses clavate or capitate, straight or slightly bent.
Ectal excipulum rich with yellow-brown (gold-brown) exsudate, in KOH yellowing, in MLZ very slowly dissolving (I didn't see those amber drops, but after about 10-15 min the preparate was completely without exsudate).
Medulla contains some angular bodies, hyaline in water, changing to brown in MLZ. Hyphae in medulla without exsudate.
Mycelium hyfae with very sparse exsudate, yellowing in KOH.

It looks a lot like O. concinna, but I didn't find any info about those "cells" in medulla, and character of the locality is perhaps a bit different too. 
Thank you very much.
  • message #44179
  • message #44179
  • message #44179
  • message #44179
  • message #44179
  • message #44179
  • message #44179
  • message #44179
Nicolas VAN VOOREN, 03-08-2016 18:31
Nicolas VAN VOOREN
Re : Yellow Otidea
All the characters correspond to Otidea concinna.
The special "cells" in medullary excipulum should be some exudates that dissolve in MLZ into amber drops.
Viktorie Halasu, 04-08-2016 09:47
Viktorie Halasu
Re : Yellow Otidea
Thank you, Nicolas.
This is a new genus for me, so I'm still learning to see the microchemical reactions.