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17-03-2026 19:41

Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Pourriez-vous m'aider à

18-03-2026 17:22

Katarina Pastircakova

Hi there,I'm looking for the following literature:

19-03-2026 10:56

Thomas Læssøe

https://svampe.databasen.org/observations/10505643

18-03-2026 13:09

Khomenko Igor Khomenko Igor

I recently examined Celtis occidentalis branches

27-02-2026 11:21

Yannick Mourgues Yannick Mourgues

Hi to all. Here is a specie that can may be relat

18-03-2026 18:42

Gonzalez Garcia Marta

I have collected some lyre-shaped apothecia on the

27-11-2025 15:41

Thomas Læssøe

Spores brownish, typically 4-celled; 26.8 x 2.4;

18-03-2026 11:52

Thomas Læssøe

https://svampe.databasen.org/observations/10493688

11-03-2026 17:36

Michel Hairaud Michel Hairaud

Bonjour, Je cherche des indices  pour cette réc

17-03-2026 10:40

Martine  Vandeplanque Martine Vandeplanque

Bonjour à tous.Chaque année en mars ou avril, il

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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!