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05-11-2025 11:33

Cladosporium ?
Pierre Repellin

Bonjpur,J'ai trouvé, sur une hampe florale d'Alli

04-11-2025 09:07

Hymenoscyphus on blueberry.
Josep Torres Josep Torres

Hello.A suspected Hymenoscyphus sprouting on a thi

04-11-2025 12:43

Protounguicularia transiens?
Edvin Johannesen Edvin Johannesen

Hi! One more found on old Populus tremula log in O

04-11-2025 14:53

Ophiobolus?
Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

03-11-2025 21:34

Tatraea sp. ? on Populus tremula
Edvin Johannesen Edvin Johannesen

These tiny (0.4-0.5 mm diam.), whitish, short-stip

03-11-2025 19:41

Ascomycetes
David Chapados David Chapados

Hi,Does anyone knows which genus could this be? G

28-10-2025 15:37

Bright orange stalked asco
Carl Farmer

I'd be grateful for any suggestions for this strik

03-11-2025 16:30

Hymenoscyphus phiala
Hans-Otto Baral Hans-Otto Baral

Hello I want to ask you if you have found this ye

01-11-2025 09:14

Telogalla olivieri
Francis Maggi

Bonjour,Trouvé sur Xanthoria parietina à Valdebl

28-10-2025 19:33

Rutstroemia firma
Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous,Je voudrais votre avis sur cette r

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Bisporic discomycete
Stefan Jakobsson, 27-05-2020 22:03
In a Finnish alder swamp I found two small apothecia growing on what i thinks is remnants of leafs of Alnus glutinosa. The colour is towards brick red or light orange brown and the diameter is 1.2 mm. The flanks seem covered with adpressed hairs on top of tissue of textura angularis.

To my surprise I found only bisporic asci under the microscope. The spores are cylindrical and the size is (13.5) 14.4 - 15.96 (16.0) × (5.4) 5.6 - 6.0 (6.6) µm. The asci are on average 61.8 × 7.1 µm and the paraphyses are once bifurcately branched, cylindrical 1.5 - 2 µm wide.


This one should not be difficult to identify but so far i have failed. Any help is welcome. Thank you in advance,


Stefan

  • message #63438
  • message #63438
Hans-Otto Baral, 27-05-2020 22:20
Hans-Otto Baral
Re : Bisporic discomycete
Yeah, this is "Hymenoscyphus" kermesinus, and we had it already in this forum, I remember I regretted there that still no sequence exists of it.


Surely it is sclerotiniaceous, but to determine a genus is difficult.
Stefan Jakobsson, 28-05-2020 10:47
Re : Bisporic discomycete
Thank you!

It looks like a Hymenoscyphus but with such hairs I did not combine it with that genus.

Stefan
Hans-Otto Baral, 28-05-2020 11:24
Hans-Otto Baral
Re : Bisporic discomycete
These hairs are inconspicuous and may exist also in hymenoscyphus. But the shape of the ascus apex and apical ring clearly point to a Sclerotiniaceae. I chose the folder Moellerodiscus for the time being.