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04-11-2025 12:43

Edvin Johannesen Edvin Johannesen

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

04-11-2025 09:07

Josep Torres Josep Torres

Hello.A suspected Hymenoscyphus sprouting on a thi

04-11-2025 14:53

Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

03-11-2025 21:34

Edvin Johannesen Edvin Johannesen

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

03-11-2025 19:41

David Chapados David Chapados

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

28-10-2025 15:37

Carl Farmer

I'd be grateful for any suggestions for this strik

03-11-2025 16:30

Hans-Otto Baral Hans-Otto Baral

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

01-11-2025 09:14

Francis Maggi

Bonjour,Trouvé sur Xanthoria parietina à Valdebl

28-10-2025 19:33

Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous,Je voudrais votre avis sur cette r

31-10-2025 09:19

Lothar Krieglsteiner Lothar Krieglsteiner

Can somebody provide me with a file of:Rogerson CT

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Helotium sp. on litter of Ledum
Nina Filippova, 19-06-2014 08:08
This smallish Helotium sp. was found on Ledum palustre litter in the bog. May be there will be some tips on species identity ).

Coordinates: N60,891131° E68,688733°, 18.06.2014.

Apothecia smallish, sessile, translucent, grayigh when in water, site single or several nearby on both leaf sides, up to 200 mk in diameter.


Excipulum from prismatic to ellipsoid cells, hyaline, cells with thickened walls, near 12 x 6 mk at base, narrower at edge (4 mk), end cells at edge smooth, cylindrical; asci clavate, with badly recognized crozier, with euamyloid small ring, 33-46.5 x 5.4-6.6 mk; paraphyses filiform, rarely branched, about 1 mk broad; spores fusiform, 7.7 (5.6-8.7) x 1.7 (1.6-1.9) mk (n=11).

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Hans-Otto Baral, 19-06-2014 08:16
Hans-Otto Baral
Re : Helotium sp. on litter of Ledum
Difficult to say. Are there any short glassy caps on some of the "hairs"?

I assume something between Cistella, Hyaloscypha and Olla.

I was reminded a bit of my "Pezizella chapmanii" in my Olla folder, a fungus found on Picea bark.

Zotto
Nina Filippova, 27-06-2014 14:45
Re : Helotium sp. on litter of Ledum
A similar species was found on fallen leaves of other plant (Betula nana). The spores here are distinctly larger. But other microstructures quite remind previous species.

Apothecia sessile, whitish, translucent, up to 500 mk broad, hymenium surface minutely powdery (probably since incrustation of paraphyses).


Excipulum at base from textura globosa, at flanks and edge from prismatica to porrecta, cells with thickened walles; end cells ("hairs") at the edge cylindrical, obtuse, 10-20 mk long, 3-4 mk broad, without incrustations; asci clavate, with barely seen crozier, 53-68 x 8-11.5 mk; paraphyses cylindrical, with obtuse tip, with pale vacuoles, in upper part with minor incrustation or mucous sheath, near 2 mk broad; spores cylindrical, 12.3 (10.6-14.6) x 2.9 (2.7-3.2) mk (n=34).

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Hans-Otto Baral, 27-06-2014 16:23
Hans-Otto Baral
Re : Helotium sp. on litter of Ledum
I suspect this has croziers. Did you test IKI for the asci?

The texture reminds me a bit for a Durella, but only the margin.

Zotto
Nina Filippova, 27-06-2014 18:57
Re : Helotium sp. on litter of Ledum
Yes, asci with croziers.

YKY shows euamyloid reaction.