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09-11-2025 13:20

Ascomycete on Rubus.
Josep Torres Josep Torres

Hello.A tiny ascomycete, appearing as erupting gra

08-11-2025 12:10

Phacidium
Elisabeth Stöckli

Bonjour, Trouvé sur tiges mortes de Rubus (ronce

08-11-2025 00:29

Allophylaria subliciformis?
Francois Guay Francois Guay

I found this species in Quebec, Canada, on herbace

04-11-2025 14:53

Leptosphaeria?
Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

08-11-2025 09:15

Mollisia sur Pinus
Michel Hairaud Michel Hairaud

Bonjour, Pouvez vous m'aider à identifier ce Mol

06-11-2025 16:50

Hymenoscyphus sp?
Rot Bojan

Hello! Yesterday I found a fungus on or near a nee

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

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

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Heterosphaeria patella?
hannie wijers, 12-04-2018 19:31
Hello.
a friend  found on a spot where there are many Achillea millefolium I saw old stems of which she thinks it is Achillea. These stems are all covered with black frb. I did it under the bino. Measure of the spores 12-17x3-5 µm. Asci 80 µm with croziers at the end. Parafysen Setpated and with drops in it J- with Melzer. Both of us think of Heterosphaeria patella. Are we right?

Sincerely Hannie Wijers
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Hans-Otto Baral, 13-04-2018 09:38
Hans-Otto Baral
Re : Heterosphaeria patella?
I think so. The ascus tip reacts faintly red, perhaps you used Melzer? It should be deeply red.

The medulla should be very thick and gelatinised.

Some other species of Heterosphaeria exist which are not always easy to identify.

hannie wijers, 13-04-2018 19:17
Re : Heterosphaeria patella?
Yes I used Melzer. Maybe sounds stupid, but what is the medulla? Thanks Zotto,

Groeten
Hannie
Hans-Otto Baral, 14-04-2018 08:02
Hans-Otto Baral
Re : Heterosphaeria patella?
Medullary excipulum is the inner excipulum. The ectal excipulum is a brown globulosa in Heterosphaeria but very thin.
hannie wijers, 14-04-2018 19:37
Re : Heterosphaeria patella?
Zotto, do you mean this? The first the inner and second the outer side?

GroetenHannie
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Hans-Otto Baral, 14-04-2018 20:37
Hans-Otto Baral
Re : Heterosphaeria patella?
Hmm, it doesn't look as it should. But you don't have a razor blade? Near the margin the inner texture may look like this, but at the lower flanks it changes to intricate with gel, see below.

But the genus is very clear.
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hannie wijers, 14-04-2018 20:44
Re : Heterosphaeria patella?
Hello, 

I have a razor blade. I will look if there is a new one Thanks fot explaning

groeten
Hannie