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19-02-2026 12:01

Castillo Joseba Castillo Joseba

Me mandan el material de Galicia (España), recole

17-02-2026 09:41

Maren Kamke Maren Kamke

Good morning, I found a Diaporthe species on Samb

16-02-2026 21:25

Andreas Millinger Andreas Millinger

Good evening,failed to find an idea for this fungu

08-12-2025 17:37

Lothar Krieglsteiner Lothar Krieglsteiner

20.6.25, on branch of Abies infected and thickened

17-02-2026 17:26

Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous, Je recherche cette publication :

03-02-2013 19:50

Nina Filippova

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

15-02-2026 04:32

Tomaz Vucko Tomaz Vucko

One more specimen that is giving me some descent a

17-02-2026 13:41

Isabelle Charissou

Bonjour, est-ce que quelqu'un pourrait me fournir

16-02-2026 18:34

Thierry Blondelle Thierry Blondelle

Bonjour,La micro de cet anamorphe de Hercospora su

16-02-2026 17:14

Joanne Taylor

Last week we published the following paper where w

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Xylariaceae?
Lepista Zacarias, 18-03-2016 20:22
Stromatic fungi growing on the stem of an herbaceous plant.
I was not able to see any asci, but the spores are distinctive, with the following dimensions:
(13.5) 14 - 15.3 (15.6) × (7) 7.6 - 9.7 (11) µm
Q = (1.3) 1.4 - 2 (2.1) ; N = 26
Me = 14.6 × 8.5 µm ; Qe = 1.7.
I would apppreciate some help for its classification.
Thanks,
zaca
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Jacques Fournier, 18-03-2016 21:55
Jacques Fournier
Re : Xylariaceae?
Hi Zaca,
the substrate looks like bark, not herbaceous and the ascospores are not intact, most of them are burst with the germ slit wide open. I agree it is xylariaceous, likely Hypoxylon fuscum.
Cheers,

Jacques
Lepista Zacarias, 18-03-2016 22:15
Re : Xylariaceae?
Merci Jacques,
For your opinion . It has the overall appearance of Hypoxylon , but I do not know how to separate it from the other Xylareaceae . You must be right Also about the host, but the observation was made at a place with tropical vegetation (tropical garden inside the city) and I don't know how to classify the plant ; It was not a tree or shrub but it has some bulbous base where the fungus developed.
Thanks again for your help,
Grateful,
zaca
Lepista Zacarias, 20-03-2016 00:25
Re : Xylariaceae?
Dear all,This time I could see the spores well and at all stages of development. The dimensions are a bit different than previously:
(14) 14.8 - 16.5 (17.7) × (6.7) 6.8 - 7.9 (8) µm
Q = (1.9) 2 - 2.28 (2.3) ; N = 31
Me = 15.5 × 7.3 µm ; Qe = 2.1
I add a set of photos.

Best wishes,
zaca

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Jacques Fournier, 21-03-2016 09:01
Jacques Fournier
Re : Xylariaceae?
Hi Zaca,
now that you have seen asci which are unitunicate, cylindrical, with an amyloid apical apparatus and brown one-celled ascospores you are indeed dealing with a Xylariaceae. The stroma surface is coloured, inside is homogeneous, a small chip of external stroma should yield pigments in a drop of 10% KOH. If the pigment is greenish yellow to dark olivaceous, depending on how big is the chip of stroma and if ascospores have a sigmoid germ slit and a perispore dehiscing in 10% KOH, you can consider H. fuscum.
The fact you found it in a tropical environment expands considerably the range of possible species, especially if there are tropical shrubs and plants imported from tropics.
Now check the pigments, the perispore and the germ slit and get back to the forum.
Cheers,

Jacques