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03-08-2016 00:25

Viktorie Halasu Viktorie Halasu

Hello all,could you please help me with this nice

03-08-2016 20:39

Miguel Ãngel Ribes Miguel Ángel Ribes

Good night, friendsI have this Ascobolus growing i

31-07-2016 11:43

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de una Peziza?? que

31-07-2016 19:14

Enrique Rubio Enrique Rubio

I'd like to know your opinion on these small (0.2-

31-07-2016 23:27

Elisabeth Stöckli

Bonsoir, Encore une espèce d'altitude (2'335m),

28-07-2016 22:28

Elisabeth Stöckli

Bonsoir, Sur bois mortes de Calluna vulgaris (Lan

01-08-2016 21:24

Bernard CLESSE Bernard CLESSE

Alors là, il n'y a vraiment plus du tout de saiso

31-07-2016 23:53

Bometon Javier Bometon Javier

Esporas 16-18 X 7-9 um, septadas, Lbs.Ascas 130-15

01-08-2016 20:38

Patrice TANCHAUD

Bonjour,récolte sur bord de chemin, dans une orni

24-07-2016 13:14

Salvador Tello

Hola a todos. Tengo estos apotecios creciendo sob

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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.