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18-03-2016 20:22

Lepista Zacarias

Stromatic fungi growing on the stem of an herbaceo

20-03-2016 22:07

Salvador Tello

Hola.He cogido estos hongos creciendo sobre madera

20-03-2016 21:06

Joaquin Martin

HiI found this Orbilia on Quercus ilex wood.I thin

18-03-2016 16:31

Angel Pintos Angel Pintos

hialine

19-03-2016 08:02

Patrice TANCHAUD

Bonjour,récolte sur déchets de tournesol pourris

20-03-2016 20:03

Adam Polhorský

Hello, one more asco for todayGrowing in groups/cl

20-03-2016 16:02

Adam Polhorský

Hi everyone,this blackish asco was found on bark o

19-03-2016 12:47

Uwe Lindemann Uwe Lindemann

Hi forum, I'm searching for the following article:

19-03-2016 20:49

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que he e

21-01-2014 19:13

Enrique Rubio Enrique Rubio

Hi to all Can you help me, with this scanty infor

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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