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07-02-2023 22:28

Fracchiaea callista? on Carpinus
Ethan Crenson

Hello friends, On Sunday, in the southern part of

19-02-2026 17:49

Ayuda con Tarzetta sp
Salvador Emilio Jose

Hola buenas tardes!! Necesito ayuda para la ident

09-02-2026 22:01

Sp
ruiz Jose

Hola, me paso esta colección en madera de pino, t

19-02-2026 13:50

Hairy disc on wood
Margot en Geert Vullings

We found this collection on deciduous wood on 7-2-

19-02-2026 12:01

Ayuda con esta
Castillo Joseba Castillo Joseba

Me mandan el material de Galicia (España), recole

17-02-2026 09:41

Diaporthe spiculosa?
Maren Kamke Maren Kamke

Good morning, I found a Diaporthe species on Samb

16-02-2026 21:25

Pyreno in the bark of Lonicera xylosteum
Andreas Millinger Andreas Millinger

Good evening,failed to find an idea for this fungu

08-12-2025 17:37

Cucurbidothis parmeliarum (pithyophila var. cembrae) - on Abies
Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

17-02-2026 17:26

Recherche biblio Lambertella WHETZEL 1943
Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous, Je recherche cette publication :

03-02-2013 19:50

Helotium schimperi
Nina Filippova

Good time), I've compared this specimen with the

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Vibrissea flavovirens?
Stefan Jakobsson, 08-07-2022 02:34
I found a Vibrissea which in most respects resemble V. flavovirens. However, the color is more greyish than "flavovirens". Also the asci and spores are somewhat small. The living asci are on average 175 µm long and the spores about 130 µm. The 16-segmented spores behave as they should, break up into four part-spores with four segments: (24.8) 26.6 - 35.8 (40.9) × (1.2) 1.4 - 1.6 (1.7) µm.

Can it be confirmed that this is V. flavovirens?

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Hans-Otto Baral, 08-07-2022 08:39
Hans-Otto Baral
Re : Vibrissea flavovirens?
I think the colour is not so important. Since I do not have an overniew on available measurements, I cannot easily say if such small measurements ever occurred, but I do not know a further species with these characters.
Stefan Jakobsson, 08-07-2022 11:49
Re : Vibrissea flavovirens?
Thank you!

I looked up the asci and spore size in a few sources.
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Hans-Otto Baral, 09-07-2022 09:42
Hans-Otto Baral
Re : Vibrissea flavovirens?
Thanks for this survey. In my key I wrote for flavovirens:

asci *260-343 x 6.5-8.8 µm

spores *125-195 x 1.2-1.8 µm

spore fragments *(27–)30-42(–51) µm

Ascus measurements in your table are probably mostly in dead state, but the differences to living asci are apparently not very high.

In the type of V. minima Velen. on Salix, which I restudied and considered a synonym, I found asci +154 x 4.8-5.3 and spore fragments 27-48 µm. So your spore fragments are a bit shorter than usual.

In a collection from Sheffield (HB 9520) I measured spores *125-134 µm long (like yours), breaking into 4 part spores of *27-38 x 1.3-1.6 µm, 4-celled (ascus length  not measured).

In the case there is a continuum of measurements among collections, I suspect that living asci much shorter than 260 µm also occur.

Identities in the literature are perhaps not certain. E.g. Zheng & Zhuang 2017 do not mention the number of spore cells and fragments, but the spore photo suggests flavovirens indeed.