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15-01-2026 10:35

Johan Boonefaes Johan Boonefaes

Last week I found this fungus, possibly a hyphomyc

15-01-2026 10:34

Johan Boonefaes Johan Boonefaes

Last week I found this fungus, possibly a hyphomyc

15-01-2026 10:34

Johan Boonefaes Johan Boonefaes

Last week I found this fungus, possibly a hyphomyc

13-01-2026 07:28

Danny Newman Danny Newman

Chlorociboria glauca on indet. decorticate logThe

13-01-2026 08:43

Danny Newman Danny Newman

Tricladium varicosporioides on indet. decorticate

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Danny Newman Danny Newman

Tatraea sp. on indet. hardwood The Swag, Great Sm

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Danny Newman Danny Newman

Dasyscyphella chrysotexta on indet. decorticate ha

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Danny Newman Danny Newman

Cordieritidaceae sp. on indet. wood w/ Hypoxylon s

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Danny Newman Danny Newman

Neodasyscypha cerina on indet decorticate logThe S

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Danny Newman Danny Newman

Coccomyces sp. on fallen Rhododendron leavesPretty

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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.