31-03-2026 21:18
Miguel Ángel Ribes
Good evening. oes anyone have the original descrip
31-03-2026 20:57
Stefan BlaserHello everybody, I hope somebody can help me with
26-03-2026 15:31
Åke Widgren
Hello,I found this one in October last year, on r
31-03-2026 16:20
Mlcoch Patrik
Hello, Please about help with determination. On
31-03-2026 08:19
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous m'aider à
30-03-2026 12:03
William Slosse
Hello all,On 27/03/26, in Kraaiveld in Wingene (Be
25-03-2026 10:35
Hulda Caroline HolteHello,I collected this species growing on a dead b
30-03-2026 09:53
Yanick BOULANGERBonjourVoici des petites fructifications poilues s
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.
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.
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
Jacques Fournier,
08-11-2019 17:58
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
I'm very happy about this find as I'm always looking for species of Biscogniauxia, Nemania and Hypoxylon I don't know.
Stefan