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08-09-2024 21:31

B Shelbourne B Shelbourne

• Stromatised substrate and macro like genus Rut

26-09-2024 17:25

Hans-Otto Baral Hans-Otto Baral

Does someone have a pdf of this paper? I have it

27-09-2024 17:01

Stephen Plummer

A poor photo, but is there enough here for someone

25-09-2024 22:18

Bometon Javier Bometon Javier

Apotecios 100 y 350 um, estipitados.Pararafisis la

25-09-2024 14:24

B Shelbourne B Shelbourne

• Macro and habitat suggest Rutstroemia, and pos

23-09-2024 17:24

Karen Poulsen

Hi there, I found a few very small apothecia on o

24-09-2024 18:27

Pierre-Yves Julien

Récolte le 01/09/2024 – Paris (75) – France â

25-09-2024 20:07

François Bartholomeeusen

After I dipped a fallen Ilex leaf in water for a d

22-09-2024 20:24

Robin Isaksson Robin Isaksson

Dear all, I did found this one on on S. acauli

23-09-2024 20:46

B Shelbourne B Shelbourne

• Macro and habitat suggest Gelatinodiscaeae.•

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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.
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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.