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12-06-2026 14:50

François Freléchoux François Freléchoux

Bonjour, Voici la brève description d'une Mollis

10-06-2026 21:16

François Freléchoux François Freléchoux

Bonsoir,Le dernier du jour, en attendant votre avi

11-06-2026 16:24

Ethan Crenson

Hi all, Recently, a friend found this Orbilia in

11-06-2026 19:01

William Slosse William Slosse

Hello all,In an attempt to make a culture of a sus

11-06-2026 19:03

Nicolas VAN VOOREN Nicolas VAN VOOREN

Chers membres d'Ascofrance,Le site sera placé en

10-06-2026 23:08

éric ROMERO éric ROMERO

Bonjour tous, Je vous propose un Mollisia trouvé

09-06-2026 18:32

Camille Mertens

Sur morceau de roseau immergé 0,5 - 0,7 mm de dia

10-06-2026 12:54

Steve Clements

Bonjour encore, Pouvez-vous m'aider, s'il vous pl

10-06-2026 21:07

François Freléchoux François Freléchoux

Toutes les tiges de gentianes jaunes de l'an passÃ

10-06-2026 13:41

François Freléchoux François Freléchoux

Bonjour à nouveau, Voici une trouvaille d'hier.

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Leucostoma niveum?
Mirek Gryc, 15-03-2021 20:12
Hello everyone

They grow on dead branch of Prunus padus.

Due to the fact that in recent times, including the type, there has been a lot of changes, I would like to ask whether these features fit Leucostoma niveum?

Spores:

(13.1) 13.2 - 15.3 (15.4) × (2.6) 2.62 - 3.1 µm

Mirek
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Peter Püwert, 15-03-2021 21:49
Peter Püwert
Re : Leucoscypha niveum?
Looks like Poronia, but Leucostoma/ Valsa are probably.
Edward Tuddenham, 15-03-2021 21:52
Re : Leucoscypha niveum?
The spores in Boudier's concept of L. niveum are eliptical with two large droplets. See plate 346. Leucoscypha leucotricha in Icones. According to Species fungorum that is synonymous with L. niveum.
Peter Püwert, 15-03-2021 22:05
Peter Püwert
Re : Leucoscypha niveum?
Hi,

Mirek wanted to write Leucostoma, not Leucoscypha.

Peter.
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Vera Hayova, 15-03-2021 22:34
Re : Leucoscypha niveum?
Hi Mirek,

This fungus is Leucostoma auerswaldii. Nice ascostromata typical of that fungus.

You can also see asexual morph on your first picture, on the right - a conidioma with dark orange drop of conidia (Cytospora personata).

Vera
Mirek Gryc, 16-03-2021 11:56
Re : Leucostoma niveum?
Thank you all for participating in the discussion!
Looking for the name for your collection, I took into account: L. niveum, L. auerswaldi and L. personnii. I compared the size of spores for these species, using various sources. However, due to the huge discrepancies, I totally lost myself.

Using your kindness if I could still ask: what should be the appropriate size range for the spores of L. auerswaldii. I'm asking because I found online collections so marked but about a slightly smaller spores and that's why I rejected this species?

Once again, thank you and best regards.
Mirek

Sorry for the mistake in the name ... I have already improved!