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19-11-2019 05:47

Ethan Crenson

Hello all, This was collected yesterday in New Y

15-11-2019 19:48

Koszka Attila

Bonjour! I found today this Boubovia-like fungus

18-11-2019 00:03

Yannick Mourgues Yannick Mourgues

Bonsoir. A friend of mine has transmetted to me p

23-02-2016 17:35

enrico ponzi

I am looking for ; Key of the genus Pseudombrophil

18-11-2019 00:03

Yannick Mourgues Yannick Mourgues

Bonsoir. A friend of mine has transmetted to me p

17-11-2019 16:46

Robin Isaksson

Ned help with this one found in Sweden in november

07-11-2019 20:59

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde on a young

17-11-2019 16:43

Riet van Oosten Riet van Oosten

Hello, Found 11-11-2019 by Laurens van der Linde,

17-11-2019 11:51

Peter Welt Peter Welt

Dear Nicolas, I have just seen that you use the na

06-11-2019 17:18

Edmond POINTE Edmond POINTE

Bonjour à tous,Récolté sur crotte de lapin, cul

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Hypoxylon s.l.
Stefan Blaser, 08-11-2019 17:43
Hello everybody,

I'm stuck with this collection and in need of some help.

I found it on a lying Tilia Trunk.

Macro:
Stromata in patches of variable size and shape from about 0.5-5 cm in Diameter. Very inconspicuous because they are nearly level with the wood surface. Stromatal surface dark brown, smooth, with very inconspicuous perithecial mounds that are level with the stromatal surface. Stroma about 0.6-0.8 mm thick with rather hard (carbonaceous) tissue. Perithecia globose to slightly tubular or pear-shaped, about 0.4-0.5 mm in diameter. Stromatal tissue yields no KOH-Extract.

Micro:
Asci 115-130 x 7-8 µm, with a short stalk, with no reaction in Melzer or IKI. Spores brown, smooth, nearly equilateral to slightly inequilateral, with a straight, spore-length germ slit, 11.5-14.0 x 5.5-6 µm.

Thanks for any suggestions,

Best wishes,

Stefan
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Jacques Fournier, 08-11-2019 17:58
Jacques Fournier
Re : Hypoxylon s.l.
Hi Stefan,

no longer a Hypoxylon but a Biscogniauxia, B. cinereolilacina, host specific for Tilia.

The stromata are purplish when young and become blackish brown. Your detailed description fits well, including the often inamyloid reaction of the apical apparatus.

Nice find!

Jacques
Stefan Blaser, 08-11-2019 19:42
Re : Hypoxylon s.l.
Hi Jacques, thank you very much. In retrospect I'm wondering why I didn't consider the Genus Biscogniauxia...
 I'm very happy about this find as I'm always looking for species of Biscogniauxia, Nemania and Hypoxylon I don't know.

Stefan